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ER400TRS-02
Easy Radio Transceiver, 433-4 Mhz
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- Manufacturer: LPRS
- Product type: RF Transceivers - Sub 2.4GHz ISM Band
- Supply Current: 25mA
- Sensitivity dBm: -102dBm
- Module Interface: UART
- Supply Voltage Max: 5.5V
- Supply Voltage Min: 2.5V
| Delivery and price | |
|---|---|
| Units per pack | 50 |
| Price | 40.48 € |
| Current stock | 10+ |
| Lead time | 7 days |
Datasheet
**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Low Power Radio Solutions Ltd**
**“ERx00-02 Series Data Sheet (Rev 2.5).pdf”**
## **Modules Included:**
- **ER400TS-02**
- **ER400RS-02**
- **ER400TRS-02**
- **ER900TS-02**
- **ER900RS-02**
- **ER900TRS-02**
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Contents**
Contents.................................................................................................................................2 Changes to this Document.....................................................................................................3 Disclaimer...............................................................................................................................3 Introduction to easyRadio......................................................................................................4 New ‘02’ Added Features..................................................................................................5 ERx00TS-02 Transmitter.......................................................................................................6 Pin Description..................................................................................................................6 ERx00RS Receiver................................................................................................................7 Pin Out...............................................................................................................................7 Pin Description..................................................................................................................8 Application & Operation ERx00TS-02 & RS-02.....................................................................9 ERx00TRS-02 Transceiver Description...............................................................................10 Pin Description................................................................................................................11 Application & Operation ERx00TRS-02...............................................................................12 Absolute Maximum Ratings ERx00TS-02, ERx00RS-02 and ERx00TRS-02.....................13 Easy-Radio Configuration Command Set............................................................................16 Notes:...................................................................................................................................20 RSSI Output....................................................................................................................20 Application Notes.............................................................................................................20 Compatibility....................................................................................................................20 PCB Layout.....................................................................................................................21 Power Supply..................................................................................................................21 Antennas.........................................................................................................................21 IMPORTANT NOTE REGARDING ESD ON ANTENNA.....................................................21 Technical Characteristics.....................................................................................................22 easyRadio errata notes:.......................................................................................................23 ISSUE1............................................................................................................................23 ISSUE2............................................................................................................................23 ISSUE 3...........................................................................................................................24 ISSUE 4...........................................................................................................................24 Product Order Codes...........................................................................................................25 Easy-Radio Module Firmware Version................................................................................25 Document History.................................................................................................................26 Copyright..............................................................................................................................26 Certificates of Conformance to EN300-220 Part3...............................................................27 ER400TS-02 and ER900TS-02....................................................................................28 ER400RS-02 and ER900RS-02...................................................................................29 ER400TRS-02 and ER900TRS-02 ..........................................................................................................................................30 Disclaimer.............................................................................................................................31 CONTACT INFORMATION.................................................................................................31
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Changes to this Document**
This data sheet has been updated to reflect firmware changes throughout the range of modules. Specific alterations are recorded in the documentation history later in the document.
## **Disclaimer**
_Low Power Radio Solutions Ltd_ has an on going policy to improve the performance and reliability of their products; we therefore reserve the right to make changes without notice. The information contained in this data sheet is believed to be accurate however we do not assume any responsibility for errors or any liability arising from the application or use of any product or circuit described herein. This data sheet neither states nor implies warranty of any kind, including fitness for any particular application.
EasyRadio modules are a component part of an end system product and should be treated as such. Testing to fitness is the sole responsibility of the manufacturer of the device into which easyRadio products are fitted, as is also the deployment into the field.
**Any liability from defect or malfunction is limited to the replacement of product ONLY, and does not include labour or other incurred corrective expenses.**
## **Using or continuing to use these devices hereby binds the user to these terms.**
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Introduction to easyRadio**
The easyRadio (ER) ERx00TS Transmitter, ERx00RS Receiver and ERx00TRS transceiver incorporate ‘easyRadio’ technology to provide high performance, simple to use radio devices that can transfer data over a range of up to 250 metres Line Of Sight (LOS). Furthermore ‘Easy-Radio’ technology allows frequency, data rate and power output to be optimised for customer specific applications. The embedded software reduces design and development time significantly.
ER modules are available in two frequency versions: ER400 series (433-434MHz) & ER900 series (869.85MHz & 902-928MHz). For purposes in this document they will be referred to as ERx00.
## **2nd Generation Modules (please READ)**
This Data Sheet covers the new hardware/firmware revisions of the Easy Radio TS, RS & TRS modules. Their Part numbers are the same as before with the addition of “-02” (eg. ER400TRS-02).
The “02” modules address issues that have been identified in previous hardware. The primary objectives for its development was to solve two main issues:
- Unintentional Loss of user configured settings:
- The previously used micro-controller (µC) was susceptible to EEPROM corruption when a ‘brown-out’ condition occurred. Particularly when power cycling the module. This had the effect of triggering the automatic _Reset to Default_ behaviour of the module.
- Frequency Stability:
- Previous data sheets clearly show a frequency tolerance of +-50ppm. Despite operating within this specification, over some batches of product this has caused some unreliable communication to occur, as frequencies have been too far away from each other. If you are having issues in this area, please contact us.
- Back Compatibility:
- New Modules can be set to be compatible with any frequency variations in the past. Please contact technical for details or consult evaluation software help file.
- What improvements are there in ‘ **02** ’?
1. The µC has now been changed to one which also has a low-voltage brown-out-detect (BOD) circuit built in. Extensive testing has been done on this, and therefore power cycling techniques to conserve power are now easily achieved without the loss of programmed settings. The new µC also benefits from greater ROM size and peripheral features which means more functionality is being packed into the Easy Radio Modules.
2. The Crystal that controls the RF is now as low as +-10ppm, which guarantees consistent frequency stability over batches and over an extended temperature range of –40°C to +85°C.
Of course some specifications have been effected to allow these hardware changes, but we feel it has been a necessary move to improve the product. LPRS are committed to the continued development and enhancement of Easy Radio and enhancements may be made without prior notice. A list of development hardware and software known issues and changes are listed at the end of this document. Please always make sure you are reading the latest document for update information.
This data sheet describes the electrical and physical characteristics of the device. Operation of the Easy Radio software and Timing Specifications are described later in this document.
## **General Features**
## **Applications**
Crystal controlled synthesiser for frequency accuracy Handheld Terminals High sensitivity receiver – typically –103dBm @ 19.2 Kbps Environmental Sense & Control Up to 10mW Transmit Power (at 434MHz) Vehicle to Base Station Data Transfer Low operating Voltage – 2.5-5.5 Volts – Single Lithium Cell Remote Data Acquisition Low power consumption: Receiver - 21mA Electronic Point of Sale equipment Transmitter - 25mA Etc Sleep – 120µA (V2.01.6 + later) User programmable: Frequency of operation Data Rate Output Power
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **New ‘02’ Added Features**
- User Customisable RS232 BAUD rate
- Literally add any required BAUD rate in the new Easy Radio Evaluation Software and select your new BAUD using the new ER_CMD#U **0** command. *
- RS232 Parity **
- Odd/even parity is supported**
- FAST ACK feature
- Reduce the time to issue ‘ER’ commands, using the HEX06 ASCII ACK character.
- • Default Power Settings
- Set your own power defaults for each channel using lowercase ‘p’ command.
- Customisable Data ID **
- Set a 16-bit ID to prevent communication with other Easy Radio Users.
- Programmable Encryption **
- Secure your data with a user defined 16-bit seed.
- User programmable frequencies
- Change the channel frequencies to personalised settings. (Via PC Software)
- DCS (Digital Channel Selection)
- Prevent crosstalk between adjacent channels
- Repeater Mode **
- Extend transmission range
- 16-bit CRC **
- Increased error checking
* Note some BAUD rates may require two stop bits. (See Evaluation Software for details on specific BAUD)
** Available on firmware versions 2.01.6 and above
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **ERx00TS-02 Transmitter**
**==> picture [329 x 394] intentionally omitted <==**
**----- Start of picture text -----**<br>
Antenna (2)<br>Vcc (3)<br>Regulator<br>RF Transmitter<br>Micro TXD (5)<br>Processor<br>RF Gnd (1) Gnd (4)<br>Figure 1 Block Diagram<br>4 mm<br>31.0mm<br>12 mm Top View<br>(Transmitter)<br>20.32mm<br>1 2 3 4 5<br>Pin Pitch 2.54 mm PCB Hole Size 1.0 mm<br>**----- End of picture text -----**<br>
Figure 2 Physical Dimensions
## **Pin Description**
|**Pin**<br>**No**|**Name**|**Description**|**Notes**|
|---|---|---|---|
|||||
|1|RF Gnd|RF ground. Connect to antenna ground (coaxial cable screen<br>braid) and local ground plane. Internally connected to Pin 4||
|2|RF Out|50Ω RF output. Connect to suitable antenna||
|3|Vcc|Positive supply pin. +2.5 to +5.5 Volts. This should be a<br>‘clean’noise free supply with less than 25mV of ripple||
|4|Gnd|Supply 0 Volt and Ground Plane||
|5|TXD|Transmit Data Digital Input (SDI)||
## **Notes**
1. The module operates internally from an on board 3.3 Volt low drop regulator.
2. TXD input will be correctly driven by logic operating at 5 Volts (CMOS & TTL logic levels). Input should not be driven by an analogue source.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **ERx00RS Receiver**
The ERx00RS-02 Receiver is a complete sub-system that combines a high performance low power RF receiver, a ‘flash’ programmable microcontroller and a voltage regulator (Figure 3). The microcontroller programmes the functions of the RF receiver and provides the interface to the host system via a data output. It also contains programmable EEPROM memory that holds configuration data for the various receiveroperating modes. The microcontroller also relieves the host from the intensive demands of searching for signals within the noise, recovering the received data and then presenting it to the host. A Received Signal Strength Indicator output can be optionally used to measure received signal levels. The module connects to a 50Ω antenna such as a whip, helical or PCB loop.
**==> picture [347 x 226] intentionally omitted <==**
**----- Start of picture text -----**<br>
Antenna (1)<br>RSSI Output (3)<br>Regulator Vcc (8)<br>RF Receiver<br>Micro BSY (4)<br>Processor<br>Serial Data Output (5)<br>Serial Data Input (6)<br>RDY (7)<br>Ground (9)<br>RF Ground (2)<br>**----- End of picture text -----**<br>
Figure 3 Easy-Radio Receiver Block Diagram
The ERx00RS-02 will receive and decode any Easy-Radio transmission within range and on the same frequency and deliver clean RS232 data to the host system for further processing.
The Serial Data Output operates at programmable standard Baud Rates (default/typical 19,200Baud).
Key parameters (frequency, power output, serial baud rate etc.) of the module may be programmed using the Easy-Radio PC Software via SDI pin 6. (Easy Radio Configuration Command Set, later in this document)
## **Pin Out**
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**----- Start of picture text -----**<br>
4.0mm<br>38.0 mm<br>14.0mm Top View<br>(Receiver)<br>10.0mm<br>15.0 mm<br>1 2 3 4 5 6 7 8 9<br>Pin Pitch 2.54 mm PCB Hole Size 1.0 mm<br>**----- End of picture text -----**<br>
**Figure 4 Physical Dimensions**
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Pin Description**
|**Pin**<br>**No**|**Name**|**Description**|**Notes**|
|---|---|---|---|
|||||
|1|Antenna|50Ω RF input/output. Connect to suitable antenna.||
|2|RF Ground|RF ground. Connect to antenna ground (coaxial cable screen<br>braid) and local ground plane. Internally connected to other<br>Ground pins.||
|3|RSSI|Received Signal Strength Indication-Analogue||
|4|BSY|Output (Low-Ready for data from Host) (High-Not Ready)|CTS function|
|5|Data Out|Received Data Output|SDO|
|6|Data In|ER command Input|SDI|
|7|RDY|Input (Low–Host Ready to receive data) (High–Not Ready)|RTS function|
|8|Vcc|Positive supply pin. +2.5 to +5.5 Volts. This should be a<br>‘clean’noise free supply with less than 25mV of ripple.||
|9|Ground|Connect to supply 0 Volt and ground plane||
## **Checklist**
1. The module operates internally from an on board 3.3 Volt low drop regulator. The logic levels of the input/output pins are therefore between 0 Volt and 3.3 Volts. (See RS Performance Data).
2. All digital inputs and outputs are intended for connection to low voltage logic devices. Do not connect any of the inputs or outputs directly to an RS232 port. The receiver module may be permanently damaged by the voltages (+/- 12V) present on RS232 signal lines. See Application Circuit (Figure 11) for typical connection to an RS232 port via MAX232 interface IC.
3. Outputs will drive logic operating at 5 Volts provided the switching levels are less than 3V.
4. If in handshaking mode, pin (7) of the ERx00RS-02 module should be 0V for data to be delivered.
5. Fit 1K resistors in series with data lines if connecting to 5V logic.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Application & Operation ERx00TS-02 & RS-02**
Figure 5 shows a typical system block diagram comprising hosts (user’s application) connected to EasyRadio Transmitters and Receivers. Host (A) will be monitoring (collecting data) and Host (B) will be receiving and processing this data.
**==> picture [386 x 75] intentionally omitted <==**
**----- Start of picture text -----**<br>
Transmit Data (TXD) RF Link Receive Data Output<br>Host Easy-Radio Easy-Radio Host<br>(A) Transmitter Receiver (B)<br>**----- End of picture text -----**<br>
Figure 5 Typical System Block Diagram
The Host (A) should provide the serial data input (up to a maximum 180 characters per packet) to the EasyRadio transmitter. The data should be sent in ‘bursts’ therefore allowing adequate time for transmission and reception over the RF link (See Figure 6). The receiver, upon reception and decoding of the RF transmission immediately sends serial data to the Host B.
Data is sent and received in standard ‘RS232’ serial format (logic level only) and there is no restriction on the characters that may be sent. (HEX 00 – FF)
- A. Host (A) sends serial data to the Easy-Radio Transmitter (A). The data must be continuously streamed at the selected baud rate and it loads an internal transmit buffer until either it is full or a gap of two bytes is detected.
- B. After detecting either the ‘End of Data’ gap or the ‘Buffer Full’ condition the controller enables RF transmit and sends the data in the buffer using Manchester coding for efficient transmission across the RF link. Any Easy-Radio receivers within range that ‘hear’ the transmission will simultaneously decode the data and place it into their receive buffers.
- C. After checking the data for integrity, the Data within the receive buffer of Easy-Radio Receiver (B) is then sent continuously to the host at the selected baud rate.
There is no ‘RF handshaking’ provided at either the transmitter or receiver. The user should therefore ensure that sufficient time is allowed for the completion of transmission and reception of data. The Timing Specifications detail these requirements (see page 9). Transmitter Host (A) must allow time for the ‘Over Air’ transmission and for the receiving Host (B) to unload (and process) the data before sending any more new data. The receiver Host (B) must always be ‘ready and waiting’ for data to arrive. It should be possible to use fast response ‘interrupts’ without any loss of data.
With such a ‘one-way’ (simplex) system there is no confirmation of the satisfactory reception of the data and for added reliability it is recommended that the data be sent, perhaps, repetitively several times. For increased reliability the use of transceivers (which can acknowledge packet reception) is recommended. Easy-Radio services do not provide automatic acknowledgement (or re-tries) but these can be provided by the users application.
**A B**
Two Byte Delay for 'End of Data'
Host (A) sends serial data to Easy-Radio (A) Easy-Radio (A) Encodes data then Transmits Over Air Easy-Radio (B) Receives & Decodes
**==> picture [13 x 13] intentionally omitted <==**
**----- Start of picture text -----**<br>
C<br>**----- End of picture text -----**<br>
Easy-Radio (B) sends serial data to Host (B)
## **Figure 6 Serial Data**
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **ERx00TRS-02 Transceiver Description**
The Easy-Radio Transceiver is a complete sub-system that combines a high performance very low power RF transceiver, a microcontroller and a voltage regulator (Figure 7).
.
**==> picture [311 x 210] intentionally omitted <==**
**----- Start of picture text -----**<br>
Antenna (1)<br>RSSI Output (3)<br>Regulator Vcc (8)<br>RF Transceiver<br>Micro BSY (4)<br>Processor Serial Data Output (5)<br>Serial Data Input (6)<br>RDY (7)<br>Ground (9)<br>RF Ground (2)<br>**----- End of picture text -----**<br>
## Figure 7 **Easy-Radio Transceiver Block Diagram**
The Serial Data Input and Serial Data Output operate at the standard 19,200 Baud and the two handshake lines provide optional flow control to and from the host. The Easy-Radio Transceiver can accept and transmit up to 180 bytes of data, which it buffers internally before transmitting in an efficient over-air code format.
Any other Easy-Radio Transceiver within range that ‘hears’ the transmission will decode the message and place the recovered data within a receive buffer that can then be unloaded to the receiving host for processing and interpretation. Transmission and reception are bi-directional half duplex i.e. transmit OR receive but not simultaneously.
**==> picture [303 x 169] intentionally omitted <==**
**----- Start of picture text -----**<br>
4.0mm<br>38.0 mm<br>14.0mm Top View<br>(Transceiver)<br>10.0mm<br>15.0 mm<br>1 2 3 4 5 6 7 8 9<br>Pin Pitch 2.54 mm PCB Hole Size 1.0 mm<br>**----- End of picture text -----**<br>
## **Figure 8 Physical Dimensions**
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Pin Description**
|**Pin**<br>**No**|**Name**|**Description**|**Notes**|
|---|---|---|---|
|||||
|1|Antenna|50Ω RF input/output. Connect to suitable antenna.||
|2|RF Ground|RF ground. Connect to antenna ground (coaxial cable screen<br>braid) and local ground plane. Internally connected to other<br>Ground pins.||
|3|RSSI|Received Signal Strength Indication||
|4|Busy Output|Digital Output to indicate that transceiver is ready to receive<br>serial data from host.|CTS function|
|5|Serial Data Out|Digital output for received data to host||
|6|Serial Data In|Digital input for serial data to be transmitted||
|7|Host Ready<br>Input|Digital Input to indicate that Host is Ready to receive serial<br>data from transceiver|RTS function|
|8|Vcc|Positive supply pin. +2.5 to +5.5 Volts. This should be a<br>‘clean’noise free supply with less than 25mV of ripple.||
|9|Ground|Connect to supply 0 Volt and ground plane||
## **Checklist**
1. The module operates internally from an on board 3.3 Volt low drop regulator. The logic levels of the input/output pins are therefore between 0 Volt and 3.3 Volts. (See specifications/performance data).
2. The serial inputs and outputs are intended for connection to a UART or similar low voltage logic device. Do not connect any of the inputs or outputs directly to an RS232 port. The transceiver module may be permanently damaged by the voltages (+/- 12V) present on RS232 signal lines. See Application Circuit (Figure 11) for typical connection to an RS232 port via MAX232 interface IC.
3. The ‘Host Ready Input’ should be tied to 0 Volt (Ground) if not used, **only** when handshaking is enabled.
4. The ‘Serial Data In’ should be tied to Vcc if not used. (Receive mode only).
5. Outputs will drive logic operating at 5 Volts and inputs will be correctly driven by logic operating at 5 Volts (CMOS & TTL logic levels).
6. Fit 1K resistors in series with data lines if connecting to 5V logic.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Application & Operation ERx00TRS-02**
Figure 9 shows a typical system block diagram comprising hosts (user’s application) connected to EasyRadio Transceivers. The hosts (A & B) will be monitoring (collecting data) and/or controlling (sending data) to some real world application.
**==> picture [386 x 76] intentionally omitted <==**
**----- Start of picture text -----**<br>
Serial Data Output RF Link Serial Data Output<br>Host Serial Data Input Easy-Radio Easy-Radio Serial Data Input Host<br>(A) Busy Transceiver Transceiver Busy (B)<br>(A) (B)<br>Host Ready Host Ready<br>**----- End of picture text -----**<br>
**Figure 9 Typical System Block Diagram**
The hosts provide serial data input and output lines and two ‘handshaking’ lines that control the flow of data to and from the Easy-Radio Transceivers. The ‘Busy’ output line, when active, indicates that the transceiver is undertaking an internal task and is not ready to receive serial data. The ‘Host Ready’ input is used to indicate that the host is ready to receive the data held in the buffer of the Easy-Radio Transceiver.
The host should check before sending data that the ‘Busy’ line is not high, as this would indicate that the transceiver is either transmitting or receiving data over the radio link. It should also pull the ‘Host Ready’ line low and check that no data appears on the Serial Data Output line.
**Timing Specifications** – Applies to all Easy-Radio Modules.
|**Parameters**|**Min**|**Units**|**Notes**|
|---|---|---|---|
|||||
|Host Serial Input/Output|2400, 4800, 9600, 19200, 38400+Custom|baud|1|
|Host Character Format|1 Start, 8 Data, No Parity, 1 Stop|Bits|2 &2a|
|End of Data Delay|2 x BAUD BYTE Duration|mS|3|
|RF Transmit|13.2+(n Bytes X 0.8)|mS|4|
|Buffer Size|1-180|Bytes|5|
## **Notes**
1. Data is inverted i.e. Start Bit is logic low. The inputs are intended for direct connection to a microcontroller UART or to RS232 inputs and outputs via an RS232 Level translator such as a Maxim MAX232, which invert the logic of the RS232 signals. This allows direct connection to, for example a Microcontroller UART. The data rate is user programmable (Default 19200 baud) and may differ between individual units within a system. (See Application Circuit diagram for logic level to RS232 interface figure 11).
2. 1 start, 8 data, 1 stop = 10 bits @ 104uS/bit = 0.52mS/character at 19200 Baud. (Default)
- a. Some Custom BAUD rates require 2 stop bits, otherwise some characters may be lost. b. If parity is used, substitute in the above calculation using 11 bits.
3. The ‘End of Data’ delay is fixed at twice the character time.
4. A fixed package overhead of 13.2mS is added to all packets.
5. The buffer size is limited to 180 bytes. Sending more than 180 bytes will cause loss of data.
- a. CTS pin will go high 2 bytes before the buffer is full. This allows characters already sent to be accepted by the ER module.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Absolute Maximum Ratings ERx00TS-02, ERx00RS-02 and ERx00TRS-02**
Operating Temperature Range -40° C to +85° C Storage Temperature Range -40° C to +85° C Vcc - 0.3 to + 6 Volts All Other Pins (N.B.) - 0.3 to 3.3 Volts Antenna 50V p-p @ < 10MHz
## **Performance Data: ERx00TS-02 Transmitter** Supply +5.0 Volt ± 5%, Temperature 20° C
|**DC Parameters**|**Pin**|**Min**|**Typical**|**Max**|**Units**|**Notes**|
|---|---|---|---|---|---|---|
||||||||
|Supply Voltage (Vcc)|3|2.5|5.0|5.5|Volts||
|Supply current|3||23||mA|1|
|**Interface Levels**|||||||
|Data Input Logic 1||2.0||4|Volts||
|Data Input Logic 0||||0.2|Volts||
|Input Impedance|||100||KΩ||
|**RF Parameters**|**Pin**|**Min**|**Typical**|**Max**|**Units**|**Notes**|
|Antenna Impedance|2||50||Ohms||
|RF Frequency||433<br>868<br>902|434<br>869.85<br>915|434<br>870<br>928|MHz<br>MHz<br>MHz|See ER<br>Configuration<br>Command set|
|RF Power Output|2|-5<br>-5|+10<br>+7|+10<br>+7|dBm (434MHz)<br>dBm (869MHz)|50Ω load<br>(depends on<br>frequency)|
|Frequency accuracy|||±10||ppm|Overall|
|FM deviation|||64||KHz||
|Harmonics||-43|||dBc|Below fundamental|
|Data Rate||2.4|19.2<br>(Default)|38.4|Kbps|Custom Over Air<br>BAUD rates can be<br>set via software|
|**Logic Timing**|**Pin**|**Min**|**Typical**|**Max**|**Units**|**Notes**|
|Power Up Time|||13|35|mS|2|
|**Mechanical**|||||||
|Size||31 x 12 x 4||mm|||
|Pin Pitch|||2.54||mm|Standard 0.1 Inch|
|Weight|||2.5||gms||
## **Notes**
1. Measured on full RF power. Current will reduce as power decreases.
2. Time required to ‘lock’ synthesiser from power up. If not previously calibrated or after a channel change, power up time is increased to 35mS.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
**Performance Data: ERx00RS-02 Receiver** Supply +5.0 Volt ± 5%, Temperature 20° C
|**DC Parameters**|**Pin**|**Min**|**Typical**|**Max**|**Units**|**Notes**|
|---|---|---|---|---|---|---|
||||||||
|Supply Voltage (Vcc)|8|2.5|5.0|5.5|Volts||
|Receive supply current|8||19.5||MA||
|Sleep Mode current|8||120||µA||
||||||||
|**Interface Levels**|||||||
|Data Output Logic 1|||3.1||Volts|10k load to+Vcc supply|
|Data Output Logic 0|||0.1||Volts|10k load to+Vcc supply|
|Logic Output Current||||25|MA||
|Data Input Logic 1||2.0||3.6|Volts||
|Data Input Logic 0||||0.2|Volts||
|Input Pull-ups|||100||KΩ||
|**RF Parameters**|**Pin**|**Min**|**Typical**|**Max**|**Units**|**Notes**|
|Antenna Impedance|1||50||Ohms||
|RF Frequency||433<br>868<br>902|434<br>869.85<br>915|434<br>870<br>928|MHz<br>MHz<br>MHz|See ER Configuration<br>Command set|
|**Receiver**|||||||
|Receive Sensitivity||-99|-102|-105|dBm|BER=10-3|
|LO leakage|||< -60||dBm|Meets EN 300 220-3|
|Data Rate||2.4|19.2|38.4|Kbps||
|RSSI Output|3|0||1.2|Volt|See Figure 10|
||||||||
|**Logic Timing**|**Pin**|**Min**|**Typical**|**Max**|**Units**|**Notes**|
|Initial Power Up Time|||14|75|mS|1|
|**Mechanical**|||||||
|Size||38 x 14 x 4||Mm|||
|Pin Pitch|||2.54||mm|Standard 0.1 Inches|
|Weight|||3.5||gms||
## **Notes**
1. When power is first applied to the module the processor retrieves ‘calibration’ data for the RF section that compensates for temperature and power supply voltage variations. The receiver will then be ready to receive. It would normally be left in this powered state ready to receive data.
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**LPRS Data Sheet**
## **Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
## **Performance Data: ERx00TRS transceiver** Supply +5.0 Volt ± 5%, Temperature 20° C
|**DC Parameters**|**Pin**|**Min**|**Typical**|**Max**|**Units**|**Units**|**Notes**|
|---|---|---|---|---|---|---|---|
|||||||||
|Supply Voltage (Vcc)|8|2.5|5.0|5.5|Volts|||
|Transmit supply current|8||25||mA|||
|Receive supply current|8||21||mA|||
|Sleep Mode current|8||120||µA|||
|||||||||
|**Interface Levels**||||||||
|Data Output Logic 1|||3.1||Volts||10k load to+Vcc supply|
|Data Output Logic 0|||0.1||Volts||10k load to+Vcc supply|
|Logic Output Current||||25|mA|||
|Data Input Logic 1||2.0||3.6|Volts|||
|Data Input Logic 0||||0.2|Volts|||
|Input Pull-ups|||100||KΩ||1|
|**RF Parameters**|**Pin**|**Min**|**Typical**|**Max**|**Units**||**Notes**|
|Antenna Impedance|1||50||Ohms|||
|RF Frequency||433<br>868<br>902|434<br>869.85<br>915|434<br>870<br>928|MHz<br>MHz<br>MHz||See ER Configuration<br>Command set|
|**Transmitter**||||||||
|RF Power Output|1|-5<br>-5|+10<br>+5|+10<br>+5|dBm (434MHz)<br>dBm (869MHz)||50Ω load<br>Depends on Frequency|
|Frequency accuracy|||±10||ppm||Overall|
|FM deviation|||64||kHz|||
|Harmonics|||-25||dBc|||
|Over Air Data rate||2400|19200|38400|bps||Manchester Encoded|
|**Receiver**||||||||
|Receive Sensitivity||-99|-102|-105|dBm||BER=10-3|
|LO leakage|||< -60||dBm||Meets EN 300 220-3|
|Serial Data Rate||0.3|19.2|38.4|Kbps||Host interface. 6|
|RSSI Output|3|0||1.2|Volt||See Figure 10|
|||||||||
|**Logic Timing**|**Pin**|**Min**|**Typical**|**Max**|**Units**||**Notes**|
|Initial Power Up Time|||13|75|mS||2,3|
|||||||||
|**Mechanical**||||||||
|Size||38 x 14 x 4||Mm||||
|Pin Pitch|||2.54|||mm|Standard 0.1 Inches|
|Weight|||3.5|||gms||
## **Notes**
1. The ‘Host Ready Input’ and the ‘Serial Data Input’ have ‘weak’ internal pull-ups enabled. These inputs should not however be left ‘floating’ but should be tied to either Vcc via a resistor for the Serial input or Ground 0 Volts for the Host Ready Input.
2. When power is first applied to the module the processor retrieves ‘calibration’ data for the RF section that compensates for temperature and power supply voltage variations. The transceiver will then be ready to receive (default) or transmit. It would normally be left in this powered state ready to receive data.
3. During power up the Busy Output line goes high.
ERx00-02 Series V2.5.doc Datasheet Revision 2.5 September 2008
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **- Easy Radio Configuration Command Set**
The programming software sends ‘Text Commands’ to the modules and this action can be performed by terminal software or the host’s Microcontroller using the following list of commands: Note that shaded items are new **02** commands only.
|**Command**|**Function**|**ER400**|**ER900**|**Notes**|
|---|---|---|---|---|
||||||
|**RS232 Communication Settings**|||||
|ER_CMD#U0|Custom BAUD<br>rate|300|300|Programmable via<br>ER Windows<br>Software (ii)|
|ER_CMD#U1|UART Data Rate|2400|2400||
|ER_CMD#U2||4800|4800||
|ER_CMD#U3||9600|9600||
|ER_CMD#U4||19200|19200||
|ER_CMD#U5||38400|38400||
|ER_CMD#U?|Get UART Value|||The module replies<br>echos with the UART<br>value. Eg:<br>ER_CMD#U2<br>No ACK is required.|
||||||
|ER_CMD#H1|Handshaking ON|OFF|OFF|Only effects RTS<br>Pin.|
|ER_CMD#H2|Handshaking OFF||||
||||||
|ER_CMD#A70|PARITY DISABLE|DISABLED BY DEFAULT<br>When enabled data = 1 Start, 8 Data, 1 Parity, 1 Stop|||
|ER_CMD#A71|EVEN PARITY||||
|ER_CMD#A72|ODD PARITY||||
||||||
|ER_CMD#I7|FAST ACK Enable|OFF|OFF|(Upper case i)<br>See notes on “FAST<br>ACK”below.|
|ER_CMD#I8|FAST ACK Disable||||
||||||
|**RF POWER Settings**|||||
|||**ER400Series**|**ER900 Series**||
|ER_CMD#P0|RF Power Output|1mW|0.0625mW (TS)|0.0625mW (TRS)|
|ER_CMD#P1|Sets output|2mW|0.125mW (TS)|0.125mW (TRS)|
|ER_CMD#P2|<br>power on a|3mW|0.25mW (TS)|0.25mW (TRS)|
|ER_CMD#P3|<br>channel|4mW|0.5mW (TS)|0.5mW (TRS)|
|ER_CMD#P4|.<br>Wrnin! Thi ll|5mW|1.2mW (TS)|1mW (TRS)|
|ER_CMD#P5|ag s eve<br>will be set to the|6mW|1.5mW (TS)|1.2mW (TRS)|
|ER_CMD#P6|<br>default settin when|7mW|2mW (TS)|1.5mW (TRS)|
|ER_CMD#P7|g<br>the frequency is|8mW|3.1mW (TS)|2mW (TRS)|
|ER_CMD#P8|<br>changed or reset via|9mW|4mW (TS)|2.5mW (TRS)|
|ER_CMD#P9|<br>a Channel command.|10mW|5mW (TS)|3.1mW (TRS)|
|ER_CMD#P?|Get Power Value|||The module replies<br>with the power value.<br>eg:<br>ER_CMD#P9<br>No ACK is required.|
||||||
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**LPRS Data Sheet**
## **Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
|ER_CMD#p0|ER_CMD#p0|Set**Default**RF|Set**Default**RF|1mW|0.0625mW|0.0625mW|NOTE lower case‘p’|
|---|---|---|---|---|---|---|---|
|ER_CMD#p1||Power Output.||2mW|0.125mW|||
|ER_CMD#p2||This allows the host||3mW|0.25mW|||
|ER_CMD#p3||to set each channel||4mW|0.5mW|||
|ER_CMD#p4||to a different default<br>||5mW|0mW|||
|ER_CMD#p5||power setting. (Ideal<br>||6mW|1mW|||
|ER_CMD#p6||for automatic<br>||7mW|2mW|||
|ER_CMD#p7||selection between<br>||8mW|3mW|||
|ER_CMD#p8||bands like 869 & 914<br>||9mW|4mW|||
|ER_CMD#p9||etc.)||10mW|5mW|||
|||||||||
|**RF Channel Settings**||||||||
|ER_CMD#C0|Channel 0||433.23 MHz||869.9MHz|All channels can now be<br>chosen in software.<br>Custom frequencies can<br>only be set using<br>software available from<br>LPRS.||
|ER_CMD#C1|Channel 1||433.30 MHz||914.65MHz|||
|ER_CMD#C2|Channel 2||433.45 MHz||Not Set|||
|ER_CMD#C3|Channel 3||433.55 MHz||Not Set|||
|ER_CMD#C4|Channel 4||433.68 MHz||869.85MHz(i)|||
|ER_CMD#C5|Channel 5||433.83 MHz||Not Set|||
|ER_CMD#C6|Channel 6||433.88 MHz||Not Set|||
|ER_CMD#C7|Channel 7||434.00 MHz||Not Set|||
|ER_CMD#C8|Channel 8||434.15 MHz||Not Set|||
|ER_CMD#C9|Channel 9||434.35 MHz||Not Set|||
|ER_CMD#C?|Get Channel Value|||||The module replies<br>echos with the power<br>value. Eg:<br>ER_CMD#C9<br>No ACK is required.||
|||||||||
|**MISCELLANEOUS COMMANDS**||||||||
|ER_CMD#R1|Reset to<br>Default Settings||U4, P9, C7||U4, P9, C0|Factory Default||
|||||||||
|ER_CMD#L0|Sleep||This command shuts down the transceiver completely by<br>halting the oscillator and dropping the microprocessor<br>down to a slow clock speed.<br>Toggle the RTS pin to wake up. (Allow start-up Time)|||||
|ER_CMD#A00|DCS OFF (default)||Recommended ON for new designs where back<br>compatibilityto older devices is not required|||||
|ER_CMD#A01|DCS ON|||||||
|ER_CMD#A10|Encryption OFF<br>(default)||Encryption algorithm is created and owned solely by<br>LPRS. It uses a 16-bit seed that can be set by the<br>developer.|||||
|ER_CMD#A11|Encryption ON|||||||
|ER_CMD#A20|CRC16 OFF (default)||The CRC16 routines are more efficient and secure than<br>the old CRC8. For new applications it is recommended.|||||
|ER_CMD#A21|CRC16 ON|||||||
|ER_CMD#A30|Repeater Mode OFF<br>(default)||When enabled, this mode will simply echo EVERY<br>message it hears. Therefore no more than 1 repeater<br>should be used UNLESS specific rules are followed.<br>An application note will be available shortly to explain this<br>further.|||||
|ER_CMD#A31|Repeater Mode ON|||||||
|ER_CMD#Fds|FREQUENCY SWAP<br>‘d’ = destination<br>‘s’ = source||This feature allows you to transmit on a different channel<br>frequency to the receive frequency.<br>e.g. ER_CMD#F07<br>After reselecting channel 0, the module will listen on CH0<br>but transmit on CH7.<br>To reset the module to its default, send the same source<br>channel number to the destination:<br>e.g. ER_CMD#F00<br>**Warning DCS should be disabled to use this feature.**|||||
|||||||||
ERx00-02 Series V2.5.doc Datasheet Revision 2.5 September 2008
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **TEST MODES**
|**TEST MODES**|**TEST MODES**|**TEST MODES**|**TEST MODES**|**TEST MODES**|
|---|---|---|---|---|
|ER_CMD#T0|Upper FSK Carrier|||Test Mode 0|
|ER_CMD#T1|Modulated Carrier|||Test Mode 1|
|ER_CMD#T2|Lower FSK Carrier|||Test Mode 2|
|ER_CMD#T3|Get Firmware<br>Revision|||Returns Firmware<br>String: eg<br>ER400TRS-02V2.01.5|
|ER_CMD#T4|RAW Data Test|||Out of CTS pin|
- i) Recommended setting for EN300-220 compliance This setting is effective on ALL ER900TRS/RS/TS despatched on or after 5[th] September 2005.
- ii) Use the custom BAUD settings with extreme caution especially on versions up to V2.0.1.7. If the custom BAUD rate has been set to a speed that is not compatible with a PC, it can only be reset using a microcontroller set to the same BAUD. From firmware V2.01.8, a start-up reset to 19200 can be set by grounding the pin on the reverse of the module on power up. This mode is temporary and allows the user to recover the module, using ER commands at 19200.(See picture Below)
## **To successfully send a command do the following:**
1. Send Command from host: e.g. ER_CMD#U5 (Set UART BAUD to 38400)
2. In the case of a TRS/RS:
- Wait for echo of command from module. e.g. ER_CMD#U5
- In the case of a TS:
- Wait 20mS
3. Send the ASCII string from the host: ACK
The commands should be sent exactly as shown (case sensitive) with no spaces between characters. The ACK command is sent as three ASCII characters, ACK in sequence. ‘A’’C’’K’ .
Note that the TS (transmitter) devices send data ‘over air’ as they are not equipped with a serial data out or handshake pins. This takes approximately 20mS and time should be taken in to account before sending the ‘ACK’ sequence
## **“FAST ACK”**
In this mode the procedure to update settings is made much faster. In response to an ER_CMD#x string the TRS/RS module will reply with a single HEX 6 (0x06) which is the ASCII ACK value. The host will then issue the same single byte 0x06 in replacement of the Txt version of “ACK”.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Notes:**
## **RSSI Output**
The Receiver/Transceiver has a built in RSSI (Received Signal Strength Indicator) that provides an analogue output voltage that is inversely proportional to the RF energy present within the pass band of the receiver. It ranges from 0 Volt (maximum signal, –65dBm) to 1 Volt (minimum signal, -115bBm) and has a slope of approximately 50dB/Volt. This analogue output signal should only be connected to a high impedance load (>100kΩs) and can be used to provide a measure of the signal strength and any interfering signals (noise) within band during the installation and operation of systems.
**==> picture [362 x 162] intentionally omitted <==**
**----- Start of picture text -----**<br>
Figure 10 RSSI Output<br>1.3<br>1.2<br>1.1<br>1<br>0.9<br>0.8<br>0.7 433Mhz<br>0.6 868MHz<br>0.5<br>0.4<br>0.3<br>0.2<br>0.1<br>0<br>-115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65<br>Received Signal Strength (dBm)<br>Voltage<br>**----- End of picture text -----**<br>
## **Application Notes**
**MAX232 Application**
**==> picture [426 x 190] intentionally omitted <==**
**----- Start of picture text -----**<br>
Antenna 7805 Vin = 8-12V DC<br>+ 5V<br>VO VI<br>GND 1N4148<br>RF GNDANT 1 2 100n 100n<br>HOST RDYDATA OUTDATA INRSSIBUSYVCCGND 3 4 5 6 7 8 9 12345678 C1+V+C1-C2+C2-V-T2OUTR2INMAX232R1OUTR2OUTT1OUTT1INT2INR1INGNDVCC 161514131211 109 100n 1 6 2 7 3 8 4 9 5 PC AT RTSTXDCTSDTRRIGNDDCDDSRRXD<br>ER<br>0 Volt<br>100n<br>Host Ready Tied Low<br>**----- End of picture text -----**<br>
**Figure 11 MAX232 Application Circuit**
## **Compatibility**
The ERx00TS, ERx00RS & ERx00TRS use crystal controlled synthesisers to accurately define transmit and receive frequencies incorporating RS232 protocols, and so should not be used in connection with Non-Easy Radio RF modules unless the firmware allows.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **PCB Layout**
The Ground (0 Volt) pins of the receiver should be connected to a substantial ground plane (large area of PCB copper) connected to 0 Volt. It is suggested that a double sided PCB be used with one layer being the ground plane.
## **Power Supply**
The supply used to power the receiver should be ‘clean’ and free from ripple and noise (<20mV p-p total). It is suggested that 100nF ceramic capacitors be used to de-couple the supply close to the power pins of the receiver. The use of ‘switch mode’ power supplies should be avoided as they can generate both conducted and radiated high frequency noise that can be very difficult to eliminate. This noise may considerably reduce the performance of any radio device that is connected or adjacent to the supply.
## **Antennas**
The receiver can be used with the various common types of antenna that match the 50Ω RF Input/Output such as a monopole (whip), helical or PCB/Wire loop antennas.
Monopole antennas are resonant with a length corresponding to one quarter of the electrical wavelength ( λ /4). They are very easy to implement and can simply be a ‘piece of wire’ or PCB track which at 434MHz should be 16.4cms in length. This should be straight, in ‘free space’ (kept well away from all other circuitry) and should be connected directly to the Antenna pin of the receiver. If the antenna is remote it should be connected via a 50Ω coaxial feeder cable or transmission line. A 50Ω transmission line can be constructed on FR4 board material by using a 3mm wide PCB track over a ground plane. This should be kept as short as possible.
Helical antennas are also resonant and generally chosen for their more compact dimensions. They are more difficult to optimise than monopole antennas and are critical with regard to surrounding objects that can easily ‘de-tune’ them. They operate most efficiently when there is a substantial ground plane for them to radiate against.
Wire or PCB Loop antennas are the most compact antennas but are less effective than the other types. They are also more difficult to design and must be carefully ‘tuned’ for best performance.
The Internet can provide much useful information on the design of Short Range Device (SRD) Antennas.
## **IMPORTANT NOTE REGARDING ESD ON ANTENNA**
It has been reported that range/sensitivity is lost over time on a selection of modules. This has been traced to ESD to the antenna (Usually exposed to ESD sources without proper insulation). Good ESD prevention techniques should be used at all times, both in production and design of final product. We suggest full environmental testing to be done before deployment as LPRS cannot be held responsible for damage caused through ESD.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Technical Characteristics**
**==> picture [384 x 237] intentionally omitted <==**
**----- Start of picture text -----**<br>
ER900TRS: Power vs Temperature (868Mhz @ 5V)<br>5<br>4.5<br>4.343<br>4<br>3.5<br>3<br>2.739<br>2.5<br>2<br>1.624<br>1.5<br>1<br>0.5<br>0<br>-40 20 85<br>Temp 'C<br>Power (mW)<br>**----- End of picture text -----**<br>
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **easyRadio errata notes:**
## **ISSUE1**
## **(LPRS ERRATA-001.pdf)**
_This Errata sheet applies to all ER400TRS-02 & ER400RS-02 modules shipped prior to 4th May 2005._
## **ISSUE:**
Frequency Channels 1, 4 & 9 may have poor or no communication.
## **DESCRIPTION:**
The receiving frequency channels 1, 4 & 9 which can be selected using the easyRadio command structure, (“ER_CMD#Cx” where x is the channel number) as set by the factory may be sufficiently off frequency to cause poor communication and in worst cases none at all on these channels.
## **All other channels are unaffected.**
This has been caused during production where incorrect values have been set in the EEPROM locations that control each channel frequency. This is NOT a software bug, but rather a setting used by the firmware. A couple of workarounds can be suggested if this poses an issue, when frequencies other than the defaults are used.
## **Work Around:**
i) Do not use channels 1,4, or 9. ii) Update module settings.
## **ISSUE2**
## **(LPRS ERRATA-002.pdf)**
_This Errata sheet applies to all ER400TRS-02 & ER400RS-02 modules with firmware up to V2.01.5_
## **ISSUE:**
RTS (Host Ready) input, does not allow restart of data flow when set low after being held high.
## **DESCRIPTION:**
When Handshaking it enabled, the data received over air will only be delivered if the RTS pin is held low continually.
Any break in the sequence (ie. RTS being set) will prevent remaining data being streamed. The module may also reset, causing a recalibration to take place.
No settings will be lost and reception will carry on transparent to the host.
## **Work Around:**
1. Do not enable the handshaking mode, then:
2. Use the CTS to prepare the system for data and dedicate time to receive the data.
This issue will be resolved in the next firmware revision (V2.01.6 & above)
The latest easyRadio Evaluation software (Version 2 and above) incorporates the necessary settings to update the module and is available for download via http://www.lprs.co.uk As this is NOT a firmware update, the firmware version will remain unaffected.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **ISSUE 3**
## **(LPRS ERRATA-003.pdf)**
_This Errata sheet applies to all ER4/900TRS-02 modules up to and including firmware V2.01.5_
## **ISSUE 4**
_This Errata applies to all ER4/900TRS-02 modules with firmware V2.01.7_
## **ISSUE:**
## **ISSUE:**
Radio appears to stop responding after an undefined period.
Data is not delivered correctly with handshaking turned on.
## **DESCRIPTION:**
## **DESCRIPTION:**
When a host device is dependant on receiving a signal from another remote unit before transmitting and usually when a lot of data is being exchanged (ie multiple transmissions & receptions per second over long periods), occasionally the PLL may not lock in frequency when returning to RX mode after a transmission. In our tests this may only happen after thousands of exchanges, typically above 5000, although this number is not definitive.
When handshaking is turned ON, the RTS pin is used to control the flow of data from the module. When the RTS pin is held high, instead of stalling the flow of data from the received buffer the data is dumped and the module reset.
## **Work Around:**
There is no workaround for this, other than to not use the feature.
This issue has been rectified in firmware version V2.01.8
## **Work Around:**
1) Test for a lock condition: Send the command: ER_CMD#L30D?
After the final “ACK“ the module will return a twobyte ASCII number. E.g. 83.
The ‘3’ is the important number. Any other number will show the PLL is not locked and needs to be reset.
Either:
- i. Send a ‘Dummy’ transmission. This will force the RX to reset again after the transmission.
- ii. Send a channel update (eg. ER_CMD#C7 etc)
- iii. Reset Module through a power on reset
2) If you do not wish to test for a lock condition, you may be able to detect (through timeouts in your own software etc) that a problem has occurred, and perform one of the resolutions as described in 1).
This issue will be resolved in the next firmware revision (V2.01.6 & above)
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Product Order Codes**
|**Name**|**Description**|**Order Code**|
|---|---|---|
||||
|Easy-Radio 400 Transmitter|UK/European Transmitter Module on 433 MHz|ER400TS-02|
|Easy-Radio 400 Receiver|UK/European Receiver Module on 433 MHz|ER400RS-02|
|Easy-Radio 400 Transceiver|UK/European Transceiver Module on 433 MHz|ER400TRS-02|
|Easy-Radio 900 Transmitter|Europe/US Transmitter Module 869/915MHZ|ER900TS-02|
|Easy-Radio 900 Receiver|Europe/US Receiver Module 869/915MHZ|ER900RS-02|
|Easy-Radio 900 Transceiver|Europe/US Transceiver Module 869/915MHZ|ER900TRS-02|
Please contact the sales office for availability and other variants of the standard product. The software interface can be customised to specific requirements for high volume applications.
## **Easy-Radio Module Firmware Version**
|**Version**|**Date**|**Revision**|**Known Issues**|
|---|---|---|---|
|2.01.10|September<br>2008|**Fixes:**<br>2.01.9 Issue resolved|None at time of print.|
|2.01.9|June 2008|**Fixes:**<br>2.01.8 Issue Resolved<br>**Features added:**<br>1)<br>TS Modules brought up to<br>feature list of TRS/RS<br>modules.|September 2008:<br>ER_CMD#C?,ER_CMD#P?,ER_CMD#<br>U? all return with extra characters.|
|2.01.8|Feb 2006|**Fixes:**<br>2.01.7 Issues resolved.<br>**Features added:**<br>RS232 override (see Page 18 note ii)|May 2008: Unwanted transient on initial<br>power-up caused by start-up calibration<br>of transmitter.|
|2.01.7|Sept 2005|**Fixes:**<br>Busy pin sets when waking from<br>sleep|1) ER_CMD#R1 “Reset to Default” does<br>not work.<br>2) If HS enabled, delivery of data may<br>stop if interrupted by asserting RTS.|
|2.01.6|Sept 2005|**Fixes:**(See errata for published<br>issues)<br>RTS issue<br>Frequency lock issue.<br>Frequency settings updated.<br>**Features added:**<br>Encryption, 16-Bit CRC, Repeater,<br>RS232 Parity, Sleep mode|Busy will not set while waking from<br>sleep. Workaround: wait 14mS before<br>sending data after waking from sleep.|
|2.01.5|March<br>2005|Fixed 2.01.4 Issue<br>Added Default Power settings using<br>lowercase‘p’(See Command Table)|See errata sheets 001-003|
|2.01.4|Feb 2005|Fixed RSSI. (Previous Releases did<br>not work correctly)|ER_CMD#R1 Reset to defaults sets<br>UART/POWER/CHANNEL all to 0|
|2.01.3|Jan 2005|Initial Release||
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Document History**
|**Issue**|**Date**|**Revision**|
|---|---|---|
|2.5|September 2008|Added check-list item regarding addition of a recommended 1K resistor to be<br>used in Data Lines for connection to 5V logic.<br>Added ESD Note on page 20.|
|2.4|March 2006|Removed references to ‘Software guide’. Added items in command list.<br>Updates some specification values.|
|2.3|September 2005|Corrected Voltage and other minor Specifications. Added Temperature<br>Characteristic table, Contents, Command list items, errata.|
|2.2|March 2005|Removed Provisional status. Updated commands & feature lists.|
|2.1|Feb 2005|First Provisional Datasheet for‘02’series modules|
## **Copyright**
The information contained in this data sheet is the property of Low Power Radio Solutions Ltd and copyright is vested in them with all rights reserved. Under copyright law this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic medium or machine readable form in whole or in part without the written consent of Low Power Radio Solutions Ltd.
The circuitry and design of the modules are also protected by copyright law.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Certificates of Conformance to EN300-220 Part3**
The following pages contain the certificates of conformance to the regulations as set out in the ETSI documentation for EN300-220, and the essential requirements, as laid out within part 3.
You may add these certificates to your own technical construction file under the provisions provided within article 3 of the Directive 1999/5/EC.
However, during design, care must be taken so that there is no amplification made to the module, either by use of an antenna with gain or an external RF amplifier. Any such changes or modifications will make these certificates invalid, and further testing will remain the responsibility of the final product.
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **ER400TS-02 and ER900TS-02**
Low Power Radio Solutions Ltd Two Rivers Industrial Estate Station Lane Witney Oxon. OX8 6BH UK info@lprs.co.uk
## **Certificate of Conformance**
**Date:** 8[th] July 2005 **Module Family:** easy-Radio **Type:** ER400TS-02 and ER900TS-02 **Frequency:** 433.23 – 434.35MHz (ER400TS-02) 869.7MHz – 870MHz (ER900TS-02) **Description:** Low Power Radio Transmitter **Intended Purpose:** RF Short Range Devices **Equipment Class:** Class 3 Radio Communications Equipment
We hereby declare the above listed product complies with the essential requirements of article 3 and other relevant provisions of the Directive 1999/5/EC when used for its intended purpose, as self-certified and tested internally by LPRS Ltd under the provisions provided within article 3 of the Directive 1999/5/EC.
Measure for the efficient use of the radio frequency spectrum pursuant to Article 3.2 Standards applied: ETS 300 220-3 09/2000
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **ER400TRS-02 and ER900TRS-02**
Low Power Radio Solutions Ltd Two Rivers Industrial Estate Station Lane Witney Oxon. OX8 6BH UK info@lprs.co.uk
## **Certificate of Conformance**
**Date:** 6[th] July 2005 **Module Family:** easy-Radio **Type:** ER400TRS-02 and ER900TRS-02 **Frequency:** 433.23 – 434.35MHz (ER400TRS-02) 869.7MHz – 870MHz (ER900TRS-02) **Description:** Low Power Radio Transceiver **Intended Purpose:** RF Short Range Devices **Equipment Class:** Class 3 Radio Communications Equipment
We hereby declare the above listed product complies with the essential requirements of article 3 and other relevant provisions of the Directive 1999/5/EC when used for its intended purpose, as self-certified and tested internally by LPRS Ltd under the provisions provided within article 3 of the Directive 1999/5/EC.
Measure for the efficient use of the radio frequency spectrum pursuant to Article 3.2
Standards applied: ETS 300 220-3 09/2000
This certificate does not cover safety, fitness for any purpose or any requirements other than those stated
Signed for and on behalf of Low Power Radio Solutions Ltd
…………………………………..
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**Easy-Radio ‘02’ (2[nd] Generation Modules) ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver**
**LPRS Data Sheet**
## **Disclaimer**
_Low Power Radio Solutions Ltd_ has an on going policy to improve the performance and reliability of their products; we therefore reserve the right to make changes without notice. The information contained in this data sheet is believed to be accurate however we do not assume any responsibility for errors or any liability arising from the application or use of any product or circuit described herein. This data sheet neither states nor implies warranty of any kind, including fitness for any particular application.
EasyRadio modules are a component part of an end system product and should be treated as such. Testing to fitness is the sole responsibility of the manufacturer of the device into which easyRadio products are fitted, as is also the deployment into the field.
**Any liability from defect or malfunction is limited to the replacement of product ONLY, and does not include labour or other incurred corrective expenses.**
## **Using or continuing to use these devices hereby binds the user to these terms.**
## **CONTACT INFORMATION**
For further information or technical **Low Power Radio Solutions** assistance please contact: **Ltd**
Two Rivers Industrial Estate Station Lane Tel: +44 (0)1993 709418 Witney Fax: +44 (0)1993 708575 Oxon Web: http://www.lprs.co.uk OX28 4BH Email: info@lprs.co.uk England Web: http://www.easy-radio.co.uk
The above address is a dedicated web site for Easy-Radio
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Updated at February 9, 2023
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