Add TX Power Testing examples
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Felix Rusu
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// TxPowerMeasurement_Receiver for RFM69 transceiver radios
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// This will switch on the Receiver and continuously sample RSSI
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// It also dials the AGC gain to the max value to simulate distance,
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// useful when bench testing to avoid RSSI saturation at high TX power levels
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// **********************************************************************************
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// Copyright Felix Rusu 2021, http://www.LowPowerLab.com/contact
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// **********************************************************************************
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#include <RFM69.h> //get it here: https://www.github.com/lowpowerlab/rfm69
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#include <RFM69Registers.h> //get it here: https://www.github.com/lowpowerlab/rfm69
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#define NODEID 1 //must be unique for each node on same network (range up to 254, 255 is used for broadcast)
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#define NETWORKID 100 //the same on all nodes that talk to each other (range up to 255)
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//Match frequency to the hardware version of the radio on your Moteino (uncomment one):
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//#define FREQUENCY RF69_433MHZ
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#define FREQUENCY RF69_915MHZ
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#define FREQUENCY_EXACT 915500000
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#define IS_RFM69HW_HCW //uncomment only for RFM69HCW! Leave out if you have RFM69CW!
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#define SERIAL_BAUD 500000
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#define DEBUG(input) Serial.print(input)
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#define DEBUGln(input) Serial.println(input)
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#define DEBUGHEX(input, param) Serial.print(input, param)
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RFM69 radio; //#if defined (__AVR_ATmega32U4__) RFM69 radio(8,7);
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int MODE;
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void setup() {
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Serial.begin(SERIAL_BAUD);
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pinMode(LED_BUILTIN, OUTPUT);
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DEBUGln("START RFM69_NODE_RX_TEST!");
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if (!radio.initialize(FREQUENCY,NODEID,NETWORKID))
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DEBUGln("radio.init() FAIL");
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else
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DEBUGln("radio.init() SUCCESS");
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#ifdef IS_RFM69HW_HCW
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radio.setHighPower(); //only for RFM69HW/HCW!
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#endif
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#ifdef FREQUENCY_EXACT
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radio.setFrequency(FREQUENCY_EXACT); //set frequency to some custom frequency
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#endif
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DEBUG("\nListening at %lu Mhz..."); DEBUGln(radio.getFrequency()/1000000L);
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//when bench testing, simulate "distance" between TX/RX radios
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radio.setLNA(RF_LNA_GAINSELECT_MAXMINUS48);
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radio.receiveDone(); //enable RX mode
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}
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void loop() {
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if (Serial.available() > 0) {
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char input = Serial.read();
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if (input == 'r') //d=dump register values
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radio.readAllRegsCompact();
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if (input == 'R') //d=dump register values
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radio.readAllRegs();
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}
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delay(200);
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Serial.println(radio.readRSSI());
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}
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@ -0,0 +1,125 @@
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// TxPowerTest_Transmitter for RFM69 transceiver radios
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// This turns on the Transmitter (unmodulated carrier) continuously
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// Should be used experimentally to measure power output and current of the transmitter
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// Use on a frequency that does not interfere with any other known active frequencies
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// Ensure settings match with the Receiver sketch if you use that to measure the RSSI
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// Trasmitter is toggled with 't' (or tactile/SPST button that pulls A0 to GND)
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// Transmitter power is controlled with +,- in steps, or <,> in dBm
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// **********************************************************************************
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// Copyright Felix Rusu 2021, http://www.LowPowerLab.com/contact
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// **********************************************************************************
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#include <RFM69.h> //get it here: https://www.github.com/lowpowerlab/rfm69
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#include <RFM69_ATC.h>
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#define NODEID 123 //must be unique for each node on same network (range up to 254, 255 is used for broadcast)
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#define NETWORKID 100 //the same on all nodes that talk to each other (range up to 255)
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//Match frequency to the hardware version of the radio on your Moteino (uncomment one):
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//#define FREQUENCY RF69_433MHZ
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#define FREQUENCY RF69_915MHZ
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#define FREQUENCY_EXACT 915500000
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#define IS_RFM69HW_HCW //uncomment only for RFM69HCW! Leave out if you have RFM69CW!
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#define ENABLE_ATC //comment out this line to disable AUTO TRANSMISSION CONTROL
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#define ATC_RSSI -90
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#define SERIAL_BAUD 500000
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#define DEBUG(input) Serial.print(input)
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#define DEBUGln(input) Serial.println(input)
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#define DEBUGHEX(input, param) Serial.print(input, param)
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#ifdef ENABLE_ATC
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RFM69_ATC radio/*(10,11) FOR M0 radio add-on board*/; //#if defined (__AVR_ATmega32U4__) RFM69_ATC radio(8,7);
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#else
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RFM69 radio; //#if defined (__AVR_ATmega32U4__) RFM69 radio(8,7);
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#endif
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int MODE;
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void setup() {
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Serial.begin(SERIAL_BAUD);
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pinMode(LED_BUILTIN, OUTPUT);
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pinMode(0, OUTPUT); digitalWrite(0, LOW);
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pinMode(A0, INPUT_PULLUP);
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DEBUGln("START RFM69_NODE_TX_TEST!");
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if (!radio.initialize(FREQUENCY,NODEID,NETWORKID))
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DEBUGln("radio.init() FAIL");
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else
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DEBUGln("radio.init() SUCCESS");
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#ifdef IS_RFM69HW_HCW
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radio.setHighPower(); //only for RFM69HW/HCW!
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#endif
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#ifdef FREQUENCY_EXACT
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radio.setFrequency(FREQUENCY_EXACT); //set frequency to some custom frequency
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#endif
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#ifdef ENABLE_ATC
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radio.enableAutoPower(ATC_RSSI);
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#endif
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char buff[50];
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sprintf(buff, "\nTransmitting at %lu Mhz...", radio.getFrequency()/1000000L);
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DEBUGln(buff);
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DEBUGln("Use:\n+,- to adjust power in _powerLevel steps");
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DEBUGln("<,> to adjust power in dBm");
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#ifdef ENABLE_ATC
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DEBUGln("RFM69_ATC Enabled (Auto Transmission Control)\n");
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#endif
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MODE = RF69_MODE_SLEEP;
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radio.setMode(MODE);
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}
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int8_t dBm=-18; //start at minimum possible value for W/CW, gets bumped by library to -2 for HW/HCW
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void loop() {
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if (Serial.available() > 0) {
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char input = Serial.read();
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if (input == 'r') //d=dump register values
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radio.readAllRegsCompact();
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if (input == 'R') //d=dump register values
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radio.readAllRegs();
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if (input=='+') {
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radio.setPowerLevel(radio.getPowerLevel()+1);
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DEBUG("_powerLevel=");DEBUGln(radio.getPowerLevel());
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}
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if (input=='-') {
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if (radio.getPowerLevel()>0) {
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radio.setPowerLevel(radio.getPowerLevel()-1);
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}
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DEBUG("_powerLevel=");DEBUGln(radio.getPowerLevel());
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}
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if (input=='<') {
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dBm = radio.setPowerDBm(dBm-1);
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DEBUG("POWER=");DEBUG(dBm);DEBUG(" (dBm); _powerLevel=");DEBUGln(radio.getPowerLevel());
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}
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if (input=='>') {
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dBm = radio.setPowerDBm(dBm+1);
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DEBUG("POWER=");DEBUG(dBm);DEBUG(" (dBm); _powerLevel=");DEBUGln(radio.getPowerLevel());
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}
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//transmit mode toggle (enables unmodulated carrier at current power level)
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if (input=='t') {
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if (MODE == RF69_MODE_TX) {
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MODE = RF69_MODE_SLEEP;
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DEBUG("RADIO_MODE = 0/SLEEP; _powerLevel=");DEBUGln(radio.getPowerLevel());
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}
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else {
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MODE = RF69_MODE_TX;
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DEBUG("RADIO_MODE = 4/TX; _powerLevel=");DEBUGln(radio.getPowerLevel());
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}
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}
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}
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delay(200);
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if (MODE == RF69_MODE_TX) radio.setMode(MODE);
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else if (digitalRead(A0)==LOW) radio.setMode(RF69_MODE_TX);
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else radio.setMode(RF69_MODE_SLEEP);
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}
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