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// Sample RFM69 sender/node sketch, with ACK and optional encryption, and Automatic Transmission Control
// Sends periodic messages of increasing length to gateway (id=1)
// It also looks for an onboard FLASH chip, if present
// **********************************************************************************
// Copyright Felix Rusu 2018, 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://www.github.com/lowpowerlab/rfm69
#include <SPIFlash.h> //get it here: https://www.github.com/lowpowerlab/spiflash
//*********************************************************************************************
//************ IMPORTANT SETTINGS - YOU MUST CHANGE/CONFIGURE TO FIT YOUR HARDWARE ************
//*********************************************************************************************
// Address IDs are 10bit, meaning usable ID range is 1..1023
// Address 0 is special (broadcast), messages to address 0 are received by all *listening* nodes (ie. active RX mode)
// Gateway ID should be kept at ID=1 for simplicity, although this is not a hard constraint
//*********************************************************************************************
#define NODEID 2 // keep UNIQUE for each node on same network
#define NETWORKID 100 // keep IDENTICAL on all nodes that talk to each other
#define GATEWAYID 1 // "central" node
//*********************************************************************************************
// Frequency should be set to match the radio module hardware tuned frequency,
// otherwise if say a "433mhz" module is set to work at 915, it will work but very badly.
// Moteinos and RF modules from LowPowerLab are marked with a colored dot to help identify their tuned frequency band,
// see this link for details: https://lowpowerlab.com/guide/moteino/transceivers/
// The below examples are predefined "center" frequencies for the radio's tuned "ISM frequency band".
// You can always set the frequency anywhere in the "frequency band", ex. the 915mhz ISM band is 902..928mhz.
//*********************************************************************************************
//#define FREQUENCY RF69_433MHZ
//#define FREQUENCY RF69_868MHZ
#define FREQUENCY RF69_915MHZ
//#define FREQUENCY_EXACT 916000000 // you may define an exact frequency/channel in Hz
#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!
//*********************************************************************************************
//Auto Transmission Control - dials down transmit power to save battery
//Usually you do not need to always transmit at max output power
//By reducing TX power even a little you save a significant amount of battery power
//This setting enables this gateway to work with remote nodes that have ATC enabled to
//dial their power down to only the required level (ATC_RSSI)
#define ENABLE_ATC //comment out this line to disable AUTO TRANSMISSION CONTROL
#define ATC_RSSI -80
//*********************************************************************************************
#define SERIAL_BAUD 115200
int TRANSMITPERIOD = 200; //transmit a packet to gateway so often (in ms)
char payload[] = "123 ABCDEFGHIJKLMNOPQRSTUVWXYZ";
char buff[20];
byte sendSize=0;
boolean requestACK = false;
SPIFlash flash(SS_FLASHMEM, 0xEF30); //EF30 for 4mbit Windbond chip (W25X40CL)
#ifdef ENABLE_ATC
RFM69_ATC radio;
#else
RFM69 radio;
#endif
void setup() {
Serial.begin(SERIAL_BAUD);
radio.initialize(FREQUENCY,NODEID,NETWORKID);
#ifdef IS_RFM69HW_HCW
radio.setHighPower(); //must include this only for RFM69HW/HCW!
#endif
#ifdef ENCRYPTKEY
radio.encrypt(ENCRYPTKEY);
#endif
#ifdef FREQUENCY_EXACT
radio.setFrequency(FREQUENCY_EXACT); //set frequency to some custom frequency
#endif
//Auto Transmission Control - dials down transmit power to save battery (-100 is the noise floor, -90 is still pretty good)
//For indoor nodes that are pretty static and at pretty stable temperatures (like a MotionMote) -90dBm is quite safe
//For more variable nodes that can expect to move or experience larger temp drifts a lower margin like -70 to -80 would probably be better
//Always test your ATC mote in the edge cases in your own environment to ensure ATC will perform as you expect
#ifdef ENABLE_ATC
radio.enableAutoPower(ATC_RSSI);
#endif
char buff[50];
sprintf(buff, "\nTransmitting at %d Mhz...", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915);
Serial.println(buff);
if (flash.initialize())
{
Serial.print("SPI Flash Init OK ... UniqueID (MAC): ");
flash.readUniqueId();
for (byte i=0;i<8;i++)
{
Serial.print(flash.UNIQUEID[i], HEX);
Serial.print(' ');
}
Serial.println();
}
else
Serial.println("SPI Flash MEM not found (is chip soldered?)...");
#ifdef ENABLE_ATC
Serial.println("RFM69_ATC Enabled (Auto Transmission Control)\n");
#endif
}
void Blink(byte PIN, int DELAY_MS)
{
pinMode(PIN, OUTPUT);
digitalWrite(PIN,HIGH);
delay(DELAY_MS);
digitalWrite(PIN,LOW);
}
long lastPeriod = 0;
void loop() {
//process any serial input
if (Serial.available() > 0)
{
char input = Serial.read();
if (input >= 48 && input <= 57) //[0,9]
{
TRANSMITPERIOD = 100 * (input-48);
if (TRANSMITPERIOD == 0) TRANSMITPERIOD = 1000;
Serial.print("\nChanging delay to ");
Serial.print(TRANSMITPERIOD);
Serial.println("ms\n");
}
if (input == 'r') //d=dump register values
radio.readAllRegs();
//if (input == 'E') //E=enable encryption
// radio.encrypt(KEY);
//if (input == 'e') //e=disable encryption
// radio.encrypt(null);
if (input == 'd') //d=dump flash area
{
Serial.println("Flash content:");
uint16_t counter = 0;
Serial.print("0-256: ");
while(counter<=256){
Serial.print(flash.readByte(counter++), HEX);
Serial.print('.');
}
while(flash.busy());
Serial.println();
}
if (input == 'e')
{
Serial.print("Erasing Flash chip ... ");
flash.chipErase();
while(flash.busy());
Serial.println("DONE");
}
if (input == 'i')
{
Serial.print("DeviceID: ");
word jedecid = flash.readDeviceId();
Serial.println(jedecid, HEX);
}
}
//check for any received packets
if (radio.receiveDone())
{
Serial.print('[');Serial.print(radio.SENDERID, DEC);Serial.print("] ");
for (byte i = 0; i < radio.DATALEN; i++)
Serial.print((char)radio.DATA[i]);
Serial.print(" [RX_RSSI:");Serial.print(radio.RSSI);Serial.print("]");
if (radio.ACKRequested())
{
radio.sendACK();
Serial.print(" - ACK sent");
}
Blink(LED_BUILTIN,3);
Serial.println();
}
int currPeriod = millis()/TRANSMITPERIOD;
if (currPeriod != lastPeriod)
{
lastPeriod=currPeriod;
//send FLASH id
if(sendSize==0)
{
sprintf(buff, "FLASH_MEM_ID:0x%X", flash.readDeviceId());
byte buffLen=strlen(buff);
if (radio.sendWithRetry(GATEWAYID, buff, buffLen))
Serial.print(" ok!");
else Serial.print(" nothing...");
//sendSize = (sendSize + 1) % 31;
}
else
{
Serial.print("Sending[");
Serial.print(sendSize);
Serial.print("]: ");
for(byte i = 0; i < sendSize; i++)
Serial.print((char)payload[i]);
if (radio.sendWithRetry(GATEWAYID, payload, sendSize))
Serial.print(" ok!");
else Serial.print(" nothing...");
}
sendSize = (sendSize + 1) % 31;
Serial.println();
Blink(LED_BUILTIN,3);
}
}
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