Sure! The frequency matches and the antennas are connected. My setup works with the Radiohead library, so I don't think the antenna or the soldering is the problem.
This is the code for the transmitter:
// ***************************************************************************************
// Sample RFM69 sketch for Moteino to illustrate:
// - sending
// - receiving
// - automatic transmission control
// - button reading/interrupts
// ***************************************************************************************
// When you press the button on the SENDER Moteino, it will send a short message to the
// RECEIVER Moteino and wait for an ACK (acknowledgement that message was received) from
// the RECEIVER Moteino. If the ACK was received, the SENDER will blink the onboard LED
// a few times. The RECEIVER listens to a specific token, and it alternates the onboard LED
// state from HIGH to LOW or vice versa whenever this token is received.
// ***************************************************************************************
// Hardware setup:
// ***************************************************************************************
// On the sender, hook up a momentary tactile button to D3 like this:
// __-__
// __| |___
// GND ----> BTN ----> D3 (D11 on MoteinoMEGA)
// Load this sketch on the RECEIVER with NODEID=RECEIVER (adjust in config section below)
// Load this sketch on the SENDER with NODEID=SENDER (adjust in config section below)
// RFM69 library and code by Felix Rusu - felix@lowpowerlab.com
// Get libraries at: https://github.com/LowPowerLab/
// Make sure you adjust the settings in the configuration section below !!!
// **********************************************************************************
// Copyright Felix Rusu 2016, http://www.LowPowerLab.com/contact
// **********************************************************************************
// License
// **********************************************************************************
// This program is free software; you can redistribute it
// and/or modify it under the terms of the GNU General
// Public License as published by the Free Software
// Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will
// be useful, but WITHOUT ANY WARRANTY; without even the
// implied warranty of MERCHANTABILITY or FITNESS FOR A
// PARTICULAR PURPOSE. See the GNU General Public
// License for more details.
//
// Licence can be viewed at
// http://www.gnu.org/licenses/gpl-3.0.txt
//
// Please maintain this license information along with authorship
// and copyright notices in any redistribution of this code
// **********************************************************************************
#include <RFM69.h> //get it here: https://www.github.com/lowpowerlab/rfm69
#include <RFM69_ATC.h> //get it here: https://github.com/lowpowerlab/RFM69
#include <SPI.h> //included with Arduino IDE (www.arduino.cc)
#include <LowPower.h> //get library from: https://github.com/lowpowerlab/lowpower
//****************************************************************************************************************
//**** IMPORTANT RADIO SETTINGS - YOU MUST CHANGE/CONFIGURE TO MATCH YOUR HARDWARE TRANSCEIVER CONFIGURATION! ****
//****************************************************************************************************************
#define NETWORKID 0 //the same on all nodes that talk to each other
#define RECEIVER 1 //unique ID of the gateway/receiver
#define SENDER 2
#define NODEID SENDER //change to "SENDER" if this is the sender node (the one with the button)
//Match frequency to the hardware version of the radio on your Moteino (uncomment one):
#define FREQUENCY RF69_433MHZ
//#define FREQUENCY RF69_868MHZ
//#define FREQUENCY RF69_915MHZ
#define ENCRYPTKEY "sampleEncryptKey" //exactly the same 16 characters/bytes on all nodes!
#define IS_RFM69HW_HCW //uncomment only for RFM69HW/HCW! Leave out if you have RFM69W/CW!
//*****************************************************************************************************************************
#define ENABLE_ATC //comment out this line to disable AUTO TRANSMISSION CONTROL
#define ATC_RSSI -75
//*********************************************************************************************
#define SERIAL_BAUD 9600
#ifdef __AVR_ATmega1284P__
#define LED 15 // Moteino MEGAs have LEDs on D15
#define BUTTON_INT 1 //user button on interrupt 1 (D3)
#define BUTTON_PIN 11 //user button on interrupt 1 (D3)
#else
#define LED 9 // Moteinos have LEDs on D9
#define BUTTON_INT 1 //user button on interrupt 1 (D3)
#define BUTTON_PIN 3 //user button on interrupt 1 (D3)
#endif
#define LED_GREEN 4 //GREEN LED on the SENDER
#define LED_RED 5 //RED LED on the SENDER
#define RX_TOGGLE_PIN 7 //GPIO to toggle on the RECEIVER
#define RFM69_RST 5
#ifdef ENABLE_ATC
RFM69_ATC radio;
#else
RFM69 radio;
#endif
void setup() {
pinMode(10, OUTPUT);
Serial.begin(SERIAL_BAUD);
radio.initialize(FREQUENCY,NODEID,NETWORKID);
#ifdef IS_RFM69HW_HCW
radio.setHighPower(); //must include this only for RFM69HW/HCW!
#endif
radio.encrypt(ENCRYPTKEY);
#ifdef ENABLE_ATC
radio.enableAutoPower(ATC_RSSI);
#endif
char buff[50];
sprintf(buff, "\nListening at %d Mhz...", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915);
Serial.println(buff);
Serial.flush();
pinMode(BUTTON_PIN, INPUT_PULLUP);
pinMode(LED, OUTPUT);
attachInterrupt(BUTTON_INT, handleButton, FALLING);
pinMode(LED_GREEN, OUTPUT);
pinMode(LED_RED, OUTPUT);
pinMode(RX_TOGGLE_PIN, OUTPUT);
digitalWrite(LED_GREEN, LOW);
digitalWrite(LED_RED, HIGH);
pinMode(RFM69_RST, OUTPUT);
digitalWrite(RFM69_RST, LOW);
// manual reset
digitalWrite(RFM69_RST, HIGH);
delay(10);
digitalWrite(RFM69_RST, LOW);
delay(10);
}
//******** THIS IS INTERRUPT BASED DEBOUNCING FOR BUTTON ATTACHED TO D3 (INTERRUPT 1)
#define FLAG_INTERRUPT 0x01
volatile int mainEventFlags = 0;
boolean buttonPressed = false;
void handleButton()
{
mainEventFlags |= FLAG_INTERRUPT;
}
byte LEDSTATE=LOW; //LOW=0
void loop() {
//******** THIS IS INTERRUPT BASED DEBOUNCING FOR BUTTON ATTACHED TO D3 (INTERRUPT 1)
if (mainEventFlags & FLAG_INTERRUPT)
{
LowPower.powerDown(SLEEP_120MS, ADC_OFF, BOD_ON);
mainEventFlags &= ~FLAG_INTERRUPT;
if (!digitalRead(BUTTON_PIN)) {
buttonPressed=true;
}
}
if (buttonPressed)
{
Serial.println("Button pressed!");
buttonPressed = false;
if(LEDSTATE==LOW)
{
LEDSTATE=HIGH;
digitalWrite(LED_GREEN, HIGH);
digitalWrite(LED_RED, LOW);
}
else
{
LEDSTATE=LOW;
digitalWrite(LED_GREEN, LOW);
digitalWrite(LED_RED, HIGH);
}
if (radio.sendWithRetry(RECEIVER, "Hi", 2)){ //target node Id, message as string or byte array, message length
Blink(LED, 40, 3);//blink LED 3 times, 40ms between blinks
} else{
Serial.println("sending failed");
}
}
//check if something was received (could be an interrupt from the radio)
if (radio.receiveDone())
{
//print message received to serial
Serial.print('[');Serial.print(radio.SENDERID);Serial.print("] ");
Serial.print((char*)radio.DATA);
Serial.print(" [RX_RSSI:");Serial.print(radio.RSSI);Serial.print("]");
Serial.println();
//check if received message is 2 bytes long, and check if the message is specifically "Hi"
if (radio.DATALEN==2 && radio.DATA[0]=='H' && radio.DATA[1]=='i')
{
if(LEDSTATE==LOW)
LEDSTATE=HIGH;
else LEDSTATE=LOW;
digitalWrite(LED, LEDSTATE);
digitalWrite(RX_TOGGLE_PIN, LEDSTATE);
}
//check if sender wanted an ACK
if (radio.ACKRequested())
{
radio.sendACK();
Serial.print(" - ACK sent");
}
}
radio.receiveDone(); //put radio in RX mode
Serial.flush(); //make sure all serial data is clocked out before sleeping the MCU
//LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_ON); //sleep Moteino in low power mode (to save battery)
}
void Blink(byte PIN, byte DELAY_MS, byte loops)
{
for (byte i=0; i<loops; i++)
{
digitalWrite(PIN,HIGH);
delay(DELAY_MS);
digitalWrite(PIN,LOW);
delay(DELAY_MS);
}
}
The receiver node is identical except for this line:
#define NODEID RECEIVER
I have added some prints in the library function bool RFM69_ATC::sendWithRetry() like so:
bool RFM69_ATC::sendWithRetry(uint16_t toAddress, const void* buffer, uint8_t bufferSize, uint8_t retries, uint8_t retryWaitTime) {
uint32_t sentTime;
for (uint8_t i = 0; i <= retries; i++) {
send(toAddress, buffer, bufferSize, true);
sentTime = millis();
uint8_t maxLevel = _isRFM69HW ? 23 : 31;
while (millis() - sentTime < retryWaitTime)
if (ACKReceived(toAddress)) return true;
if (_powerLevel < maxLevel) {
setPowerLevel(_powerLevel + _transmitLevelStep);
}
}
Serial.println("No ack received");
return false;
}
This is what is printed:
Listening at 433 Mhz...
Button pressed!
No ack received
sending failed
Button pressed!
on the node where the button is pressed twice, and
Listening at 433 Mhz...
on the listening node.
It sure seems like they're not communicating, but I'm not sure how to debug it. Also, the second time I press the button after a failed send, everything freezes and a reset is needed to get the sender node running.
