DELTA-TRX8C1

Alarm Systems Module, FM, 500Kbps, 868MHz, -121dBm, 1.8V to 3.6V Supply, SPI, UART

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
Manufacturer: RF SOLUTIONS
Product type: RF Transceivers - Sub 2.4GHz ISM Band
Data Rate Max: 500Kbps
Frequency Max: 868MHz
RF Modulation: FM
Transmit Power: 20dBm
Sensitivity dBm: -121dBm
Module Interface: SPI, UART
Supply Voltage Max: 3.6V
Supply Voltage Min: 1.8V
RF Transceiver Applications: Alarm Systems, Fire and Security, Home Automation, Sensors and Networks, Telemetry
Delivery and price
Units per pack	100
Price	16.68 €
Current stock	10+
Lead time	30 days
Datasheet
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Note: The two programming pins “JP1” and ANT GND are not shown in diagram as these 12 are not required 5 or 11 GND GND 1 )O Vcc 2 SPIO MOSI 3 k ~~O~~ egq SPIO MISO 4 ~~TO~~ SPIO SCLK 5 im ~~——~~ im SPI NSS 6 **J** QL>O} 4. oOU [] U f : b ~~—~~ Oo NIRQ / UART TX 7 g ~~an~~ = Oo SPIO ENABLE/ 8 UART RX Md J ~~o~~ GND 9 10 GND 

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DELTA Class1 Capable RF Transceiver. 

## Generic Application Schematic —using UART to a PIC16F886 

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## Generic Application Schematic — — using SPI to a PIC16F886 

www.rfsolutions.co.uk 

## DELTA Class 1 Capable RF Transceiver 

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## SPI Command Set and Interface 

## Mode Select 

|Command for ATM Mode|Command for ATM Mode|Command for ATM Mode|
|---|---|---|
||||
|1|RX|When RXmode selected will default to last setting set usingATR<br>command or if not set.|
|3|Ready|Ready is a low powerwake state which can be used for fast entry<br>to RX or switching between TXand RX. Time to RX orTX from<br>READY <1ms|
|||Low power sleep mode with register retention.|



Example: Put the module into receiver mode 

|Command|A|T|M|1|
|---|---|---|---|---|
|Decimalbytevalue|65|84|77|1|



## Receiver Mode 

|Command for Receiver Mode: ATR CHANNEL, PACKET LENGTH|Command for Receiver Mode: ATR CHANNEL, PACKET LENGTH|Command for Receiver Mode: ATR CHANNEL, PACKET LENGTH|
|---|---|---|
||||
||Packet length|The length of the data packet to follow|



Example: Enter RECEIVE mode and wait for a 10 byte packet 

Command A T R 10 Decimal byte value 65 84 82 10 

## Transmit Mode 

|Command for Transmit Mode: ATS CHANNEL, PACKET LENGTH, DATA|Command for Transmit Mode: ATS CHANNEL, PACKET LENGTH, DATA|Command for Transmit Mode: ATS CHANNEL, PACKET LENGTH, DATA|
|---|---|---|
||||
|~~Fata~~|Packet length<br>~~Fata~~|The length of the data packet to follow. In 8 bit bytes.<br>~~Yourdatatobetransmitted.(Data=DataPacket*PacketLength)~~|
|~~Fata~~|~~Fata~~|~~Yourdatatobetransmitted.(Data=DataPacket*PacketLength)~~|



Example: Send a 10 byte data packet 

Command A T S 10 DATA PACKET 0-255 Decimal byte value 65 84 83 10 0-255 

www.rfsolutions.co.uk 

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## SPI Command Set and Interface continued 

## Module RF Sync Bytes: 

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Command for Sync Byte: ATA SYNC1, SYNC2, SYNC3, SYNC4<br>SYNCK Po Reverse Order Bits I.e. 2D = B4 and D4 = 2B<br>**----- End of picture text -----**<br>


Example: send SYNC BYTES to 12, 34, 56, 78 Command A T A 12 34 56 78 Decimal byte value 65 84 65 12 34 56 78 

## Set RF TX Power 

Command for ATP TX POWER TX PWR 0-127 in 0.25db steps, where +20dbm is 127 

Example: Sets the RF TX power to 19 

Command A T P 19 Decimal byte value 65 84 80 19 

## DATA Packet Received 

IRQ GOES LOW 

READ FIRST TWO BYTES FROM MODULE SHOULD BE #R 

FOLLOWED BY THE PACKET LENGTH, RSS! VALUE AND DATA PACKET 

NOTE: In order to be suitable for Class certification the DELTA modules Baud rates are fixed to the following values: 

RF Baud Rate : 9600bps (GFSK) 

Host Baud Rate: 19,200bps 

www.rfsolutions.co.uk 

DELTA a Class 1 Capable RF Transceiver 

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## Ping-Pong (Walk test) 

The DELTA has a built in walk test mode that allows users to performance test via simple commands. By setting both transmitter and receiver into this mode, the transmitter will broadcast a packet to the receiver (ping) and the receiver will output #RZYXWVUTSRO (this is simply #R and then 10 letters of the alphabet in reverse) to show that the ping command has been received. The receiver will then send a packet back to the transmitter (pong). The transmitter will output #T followed by the RSSI value (Received Signal Strength Indication). If no reply packet is received back from the receiver with 200ms the RSSI value will be O. 

The below command will place DELTA into ping-pong mode as a transmitter. The transmitter will output every 200ms the RSSI value of a valid packet through its UART RX pin. 

## AI T#000 

## Channel number (byte value) 

The screen shot below shows a terminal window and the received data on the RX pin. The image shows the data packet that is output when a successful ping-pong takes place on the transmitter. 

|& Terminalv1.9b - 201112308 - byBr@y++<br>Disconnect| { COM Patt<br>Baudrate<br>—<br>-<br>Data bits) Patty —)<br>ea<br>**|** [oeI Coo © samc tis200|/ 2 |cam <br>bow.|__coMs| vera eadseh v7<br>San <br>Quit<br>© 9600<br>56000 © custom ||© 8<br>© space|& Terminalv1.9b - 201112308 - byBr@y++<br>Disconnect| { COM Patt<br>Baudrate<br>—<br>-<br>Data bits) Patty —)<br>ea<br>**|** [oeI Coo © samc tis200|/ 2 |cam <br>bow.|__coMs| vera eadseh v7<br>San <br>Quit<br>© 9600<br>56000 © custom ||© 8<br>© space|-<br>Stop bits) -Handshaking<br> |S<br>||eaters<br> a<br>Perearcemnenre<br>|© 2<br>©RTS<br>onTx [7 invert|-<br>Stop bits) -Handshaking<br> |S<br>||eaters<br> a<br>Perearcemnenre<br>|© 2<br>©RTS<br>onTx [7 invert|a|x|
|---|---|---|---|---|---|
|=<br>ResetCounter| [OS] Counter= 171<br>HEN FF Dee TF Bin|Staittog||Request/Response|||
|ao<br>Send File fj IT CR=CR+LF<br>BREAK,||||Gor=|=|
|ee|<br>|<br>|<br>|<br>|<br>|<br>||||||<br>|<br>||||
||||||||
|Zonnected<br>Rx 987<br>Tx 4<br>RxOK||||||
|The screen shot below shows the values output by the transmitter during the walk testwhen no packet is received||||||
|back from the receiver.||||||
|About. |)_COMs||! ~ agog 3e400 ¢ 256000|| 7 |]@ mark<br>‘Quit<br>© 9600<br>© 56000<br>© custom || © 8<br>© space||||© 2|**©** **RTS**/CTS+XON/XOFF<br>onTX [<br>invert|||
|Receive||||||
|CLEAR| ResetCounter| [0 3] Counter= 2<br>Ces fe hee | Ot|Stathog||Request/Response|||
|a<br>SendFile<br>fo 3] > CR=CR+LF<br>BREAK||||Gore|Gyars|
|S| S| S| S|S| | SS)|| SS)||SS) SS) S||||
|fn|||||Ren|
|ee||||||
|Connected<br>Ax. 188<br>Tx 4<br>Rx OK||||||
||||wvww.rfsolutions.co.uk|||



DELTA a Class 1 Capable RF Transceiver 

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To configure the DELTA into receiver mode for the ping-pong walk test, the following string needs to be sent to the TX pin. 

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ATR#000#010<br>**----- End of picture text -----**<br>


Channel number (byte value) 10 byte payload (this is the only byte value that will enter the device into ping -pong) 

**==> picture [536 x 333] intentionally omitted <==**

**----- Start of picture text -----**<br>
The screen shot below shows a terminal window with a successful packet received, here you can see the HEX val-<br>ues for #RZYXWVUTSRQ (This being the TEN BYTES and the #R showing receiver).<br>About COMs Clason Flssa0 escnon 90 wae ae CIRTSCTSRON OFF<br>Quit © 9600 ¢ 56000 © custom || © 8 © space) © 2 © RTS on TX [~ invert<br>_ ResetCounter| OS] Couner= 16 |HEX, Bee F 8m statog Request/Response<br>P|<br>et Send File Pp a  CR=CR+LF BREAK Corre Garr<br>= ee ee ee | ee | | |<br>F a rr woootO1O R Send<br>**----- End of picture text -----**<br>


www.rfsolutions.co.uk 

## DELTA Cl Class Capabl ‘4 aS1 Capable RF Transceiver eo)aXN 

## Electrical Parameters 

## Absolute Maximums 

## Recommended Operating Conditions 

|~~fanbetenpeswre ~~|~~of ~~|~~of ~~|~~of ~~|~~of ~~||~~|~~|~~|~~|~~|~~|||~~ts | ~~|~~ts | ~~|~~ts | ~~|~~ts | ~~|~~|~~|~~|~~|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||||||||||||||||||
|DC Characteristics|||||||||||||||||||
||||||||||||||||||||
|Current|||||||||||||||||||
|Ready|||||||||||||||||||
|Sleep<br>~~fRemodecuret~~<br>~~|~~<br>~~|~~<br>~~[xmedecurens~~<br>~~|~~<br>SynthesizerAC Electrical Characteristics||||||||~~Cd~~|||||~~|~~||||||
||||||||||||||||||||
|Range|||||||||||||||||||
|Synthesizer frequency|||||F pes-s68|||850-870|||||14.4|||||Hz|
|Resolution|||||||||||||||||||



## Auxiliary Block Specifications 

|ter<br>~~seemed~~|||||||
|---|---|---|---|---|---|---|
||||||||
||~~seemed~~|~~seemed~~|~~seemed~~|~~seemed~~|~~seemed~~|~~seemed~~|



www.rfsolutions.co.uk 

axe® NY 

## DELTA Class 1 Capable RF Transceiver 

## Receiver AC electrical characteristics 

|~~RXfrequencyrange~~<br>~~|~~|~~|Fn~~|~~P85~~|~~P85~~|~~P85~~<br>~~870~~|~~P85~~<br>~~870|~~|~~P85~~<br>~~|MHZ|~~|
|---|---|---|---|---|---|---|
|~~RXfrequencyrange~~<br>~~|~~|~~|Fn~~|~~P85~~|~~P85~~|~~P85~~<br>~~870~~|~~P85~~<br>~~870|~~|~~P85~~<br>~~|MHZ|~~|
|~~RXfrequencyrange~~<br>~~|~~|~~| Fn ~~|~~P85~~<br>(2.4 kbps, GFSK, BT = 0.5,<br>DF = +30 kHz, 114 KHz Rx BW)|~~P85~~|~~P85~~<br>~~870~~|~~P85~~<br>~~870 |~~|~~P85~~<br>~~| MHZ |~~|
||Pro|(BER < 0.1%)<br>(40 kbps, GFSK, BT = 0.5,<br>DF = #25 kHz, 114 kHz Rx BW)||-108||dBm|
|||(128 kbps, GFSK, BT = 0.5,<br>DF = 70 kHz, 305 kHz Rx BW)|||||
||Pax. oox|(BER < 0.1%,1 Kbps, 185 kHz Rx BW, OOK,<br>PN15 data)||-113||dBm|
|||(BER< 0.1%,40 kbps,185 kHz RxBW, OOK,<br>PN15 data)||-102||dBm|
||||||||
|BERvariation vs power<br>Level2<br>~~RSSIresolution~~<br>~~PRES~~<br>~~+1-Ch~~|Prax res<br>~~PRES PO~~|Up to +5 dBm Input Level<br>~~PO~~|~~PO~~<br>~~05~~|~~PO~~<br>~~05~~|0.1<br>~~PO~~|ppm<br>~~PO~~|
|~~RSSIresolution~~<br>~~PRES~~<br>~~+1-Choffsetselectivity~~|~~PRES PO~~|~~PO~~<br>DesiredRefSignal3dBabovesensitivity,~~|~~|~~PO~~<br>~~05~~<br>~~|—|~~|~~PO~~<br>~~05~~<br>~~|-se|~~|~~PO~~<br>~~|—|~~|~~PO~~<br>~~|dB|~~|
|~~RSSI resolution~~<br>~~PRES~~<br>~~+1-Ch~~ ~~offsetselectivity~~|~~PRES PO~~|~~PO~~<br>Desired Ref Signal 3 dB above sensitivity, ~~|~~<br>BER < 0.1%. Interferer is CWand desired<br>modulated with 1.2 Kbps,<br>DF = 5.2 kHz, GFSK with BT= 0.5,<br>RX BW=58 kHz channel spac-<br>ing = 100 kHz<br>Desiredrefsignal3dBabovesensitiv-ity,~~|~~|~~PO~~<br>~~05~~<br>~~|—|~~|~~PO~~<br>~~05~~<br>~~|-se|~~|~~PO~~<br>~~|—|~~|~~PO~~<br>~~|dB|~~|
|~~offset selectivity~~<br>+2-Ch offset selectivity<br>~~Blocking200kHz-1MHz~~|C/locx||~~| — |~~<br>~~|—|~~|~~| -se |~~<br>_59<br>~~|8[|~~|~~| — |~~<br>~~[|—|~~|~~| dB |~~<br>~~|ab|~~|
|~~Blocking200kHz-1MHz~~<br>Blocking~~1Mizoffset~~|7M|Desired ref signal 3 dB above sensitiv- ity, ~~|~~<br>BER < 0.1%. Interferer isCWand desired<br>modviatedwith12kbos<br>DF = 5.2 KHz GFSK with BT = 0.5,<br>motes|~~|—|~~<br>~~|__~~|~~|8[|~~<br>61<br>~~|__~~<br>~~“et~~|~~[|—|~~<br>~~|__~~~~**|**~~<br>~~=~~|~~|ab|~~<br>~~**|**~~<br>~~8~~|
|~~Blocking 200 kHz-1 MHz~~<br>Blocking~~1Mizoffset~~|7M||~~| — |~~<br>~~|__~~|~~| 8 [|~~<br>61<br>~~|__~~<br>~~“et~~|~~[| — |~~<br>~~|__~~~~**|**~~<br>~~=~~|~~| ab |~~<br>~~**|**~~<br>~~8~~|
|~~1Miz offset~~<br>;<br>~~nga~~|8M||~~|__~~<br>~~Te~~|~~|__~~<br>~~“et ~~<br>-79<br>~~Te~~|~~|__~~~~**|**~~<br> ~~=~~<br>~~Te~~|~~**|**~~<br>~~8~~<br>~~Te~~|
||<br>‘ect<br>mage rejection|Mees|Rejection atthe imagefrequency<br>IF = 468 kHz||-35|||
|Spurious emissions|Pos-rxi|Measured at RX pins||-54||dBm|



www.rfsolutions.co.uk 

axe® NY 

## DELTA Class 1 Capable RF Transceiver 

## Transmitter AC electrical characteristics 

||Symbol||||||
|---|---|---|---|---|---|---|
|~~a~~|~~a~~||||||
|~~DOKdalerats~~|~~a~~|~~ee~~|~~eee~~|~~eee~~|||
|~~DOKdalerats~~|~~a~~|~~ee~~|~~eee~~|~~eee~~|||
|~~DOK dale rats~~|~~a~~|~~ee ~~|~~eee~~|~~eee~~|||
|resolution|||||||
||1X||||||
|TXRFoutputsteps||Usingswitchedcurrentmatch within<br>6 dB ofmax power||01|||
|TX RF output level||5|||||
|TXRFoutput level<br>Variationvs. frequency|pp<br>RF_FREQ|Measured across850-870MHz||0.5|||
|Transmit modulation<br>filtering|BT|Gaussian filteringbandwidth time<br>product||0s|||
|Spurious emissions|Posi|Pour = +13 dBm,<br>Frequencies<1 GHz<br>~~1-12.75GHz,excludingharmonics~~<br>~~|~~|~~|—|~~|o4<br>~~|-42|~~|~~|—|~~|dBm<br>~~|dBm|~~|
|||~~1-12.75GHz,excludingharmonics~~<br>~~|~~|~~|—|~~|~~|-42|~~|~~|—|~~|~~|dBm|~~|
|Harmonics|P2urem|~~1-12.75 GHz, excluding harmonics~~<br>~~|~~<br>Using reference designTX matching<br>network and filter with max output<br>power. Harmonics reduce linearlywith<br>output power.|~~| — |~~|~~| -42 |~~<br>-42|~~| — |~~|~~| dBm |~~<br>dBm|
||P3yisen|||-42||dBm|



www.rfsolutions.co.uk 

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2.45 9.96 18.37<br>LJ<br>PCB pad Layout<br>1.77<br>2.54<br>**----- End of picture text -----**<br>


® 

DELTA Class1 Capable RF Transceiver. 

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**----- Start of picture text -----**<br>
sd<br>XS on<br>0‘auta,<br>**----- End of picture text -----**<br>


## Range Test1 In a Built up area within buildings—2KM 

The range test was carried out in HOVE, East Sussex in clear atmospheric conditions. 

The DELTA modules were mounted on Small prototyping boards with a simple piece of wire as antenna (not ideall) 

One DELTA module was placed on the roof of a vehicle and connected to a laptop (via LVTTL RS232) and a packet was sent every 0.5 seconds via a terminal program. The second DELTA module was connected to a laptop anda terminal window was used to view the packet (ASCII characters) 

**==> picture [513 x 361] intentionally omitted <==**

**----- Start of picture text -----**<br>
J<br>aa f . a Mee et<br>< Mano t 4 - Portslade ==<br>Southwick g g T Hall Rd Shelldale Rd . ] Portland re<br>5 s Southwick % Portslade Cemetery ‘A Vale Rd 8 J<br>Albert S S Recreation Yay Fiehereqatese nerd vale R & 3 2<br> p 2 4 Ground cardner Rd cladsto® é g 2 g 2 §<br>Croft AV FISHERSGATE) = Sg 2 2 8<br>N & n g 82066 a & =<br>& Southwicki2= The Gardens "3 [epee 3 = StAng, ia<br>Butts Rd<br>a ii habe! Ra = q 5 ons 2 New ch<br>st & Wemoto Albion st A259 A259 2 2 Be es g<br>®iver Adur A259 2 : 3 > 2 < = @ od<br>Basin RdS C2 GS & é = & 5<br>" its Cafe Bar Kingsway © @&<br>Basin Rds ay<br>2km Basin rgg —Sn has ModelHoveYacht LagoonClub ~a g,<br>**----- End of picture text -----**<br>


www.rfsolutions.co.uk 

**9km**
Updated at February 9, 2023
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