Hello ! For a university project, I would like to establish a connection between 2 RFM69HW modules to be able to read the RSSI and know if they are more or less far away.I use arduino uno boards.
for this I started from the TxPowerTest_Transmitter and Receiver examples (the most suitable I think for what I want to do?) but I have a problem, I receive in both monitor serie :
" radio.init() FAIL
Transmitting/Receiving at 240 Mhz...
Use:
+,- to adjust power in _powerLevel steps
<,> to adjust power in dBm "
I guess the error comes from the line:
if (!radio.initialize(FREQUENCY,NODEID,NETWORKID))
What can I do to resolve it please ?
There is the code I use :
#include <RFM69.h> //get it here: https://www.github.com/lowpowerlab/rfm69
#include <RFM69_ATC.h>
#define NODEID 123 //must be unique for each node on same network (range up to 254, 255 is used for broadcast)
#define NETWORKID 100 //the same on all nodes that talk to each other (range up to 255)
#define TONODEID 1 //
//Match frequency to the hardware version of the radio on your Moteino (uncomment one):
//#define FREQUENCY RF69_433MHZ
#define FREQUENCY RF69_868MHZ
#define FREQUENCY_EXACT 915500000
#define IS_RFM69HW_HCW //uncomment only for RFM69HCW! Leave out if you have RFM69CW!
//#define ENABLE_ATC //comment out this line to disable AUTO TRANSMISSION CONTROL
#define ATC_RSSI -90
#define SERIAL_BAUD 500000
#define DEBUG(input) Serial.print(input)
#define DEBUGln(input) Serial.println(input)
#define DEBUGHEX(input, param) Serial.print(input, param)
#ifdef ENABLE_ATC
RFM69_ATC radio/*(10,11) FOR M0 radio add-on board*/; //#if defined (__AVR_ATmega32U4__) RFM69_ATC radio(8,7);
#else
RFM69 radio; //#if defined (__AVR_ATmega32U4__) RFM69 radio(8,7);
#endif
int MODE;
void setup() {
Serial.begin(SERIAL_BAUD);
pinMode(LED_BUILTIN, OUTPUT);
pinMode(0, OUTPUT); digitalWrite(0, LOW);
pinMode(A0, INPUT_PULLUP);
DEBUGln("START RFM69_NODE_TX_TEST!");
if (!radio.initialize(FREQUENCY,NODEID,NETWORKID))
DEBUGln("radio.init() FAIL");
else
DEBUGln("radio.init() SUCCESS");
#ifdef IS_RFM69HW_HCW
radio.setHighPower(); //only for RFM69HW/HCW!
#endif
#ifdef FREQUENCY_EXACT
radio.setFrequency(FREQUENCY_EXACT); //set frequency to some custom frequency
#endif
#ifdef ENABLE_ATC
radio.enableAutoPower(ATC_RSSI);
#endif
char buff[50];
sprintf(buff, "\nTransmitting at %lu Mhz...", radio.getFrequency()/1000000L);
DEBUGln(buff);
DEBUGln("Use:\n+,- to adjust power in _powerLevel steps");
DEBUGln("<,> to adjust power in dBm");
#ifdef ENABLE_ATC
DEBUGln("RFM69_ATC Enabled (Auto Transmission Control)\n");
#endif
MODE = RF69_MODE_SLEEP;
radio.setMode(MODE);
}
int8_t dBm=-18; //start at minimum possible value for W/CW, gets bumped by library to -2 for HW/HCW
void loop() {
if (Serial.available() > 0) {
char input = Serial.read();
if (input == 'r') //d=dump register values
radio.readAllRegsCompact();
if (input == 'R') //d=dump register values
radio.readAllRegs();
if (input=='+') {
radio.setPowerLevel(radio.getPowerLevel()+1);
DEBUG("_powerLevel=");DEBUGln(radio.getPowerLevel());
}
if (input=='-') {
if (radio.getPowerLevel()>0) {
radio.setPowerLevel(radio.getPowerLevel()-1);
}
DEBUG("_powerLevel=");DEBUGln(radio.getPowerLevel());
}
if (input=='<') {
dBm = radio.setPowerDBm(dBm-1);
DEBUG("POWER=");DEBUG(dBm);DEBUG(" (dBm); _powerLevel=");DEBUGln(radio.getPowerLevel());
}
if (input=='>') {
dBm = radio.setPowerDBm(dBm+1);
DEBUG("POWER=");DEBUG(dBm);DEBUG(" (dBm); _powerLevel=");DEBUGln(radio.getPowerLevel());
}
//transmit mode toggle (enables unmodulated carrier at current power level)
if (input=='t') {
if (MODE == RF69_MODE_TX) {
MODE = RF69_MODE_SLEEP;
DEBUG("RADIO_MODE = 0/SLEEP; _powerLevel=");DEBUGln(radio.getPowerLevel());
}
else {
MODE = RF69_MODE_TX;
DEBUG("RADIO_MODE = 4/TX; _powerLevel=");DEBUGln(radio.getPowerLevel());
}
}
}
delay(200);
if (MODE == RF69_MODE_TX) radio.setMode(MODE);
else if (digitalRead(A0)==LOW) radio.setMode(RF69_MODE_TX);
else radio.setMode(RF69_MODE_SLEEP);
}
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