Arduino walkie talkie /Arduino two way radio used RDA5807M & KT0803.
Please use IDE 1.5.7 to complete,or go worng.
pin 4 is indicate to transmit.
#include <Arduino.h>#include <Wire.h>#include <radio.h>#include <RDA5807M.h>#include <FMTX.h>RDA5807M radio; // Create an instance of Class for RDA5807M ChipRADIO_INFO ri;//rssi float fm_freq =108.0;//tx freuqencyint i=0;int k=0;int ptt=3;void setup() {pinMode(ptt, INPUT);//PTTpinMode(4,OUTPUT); i2c_init(); radio.init(); radio.setFrequency(10800);//rx frequency radio.setVolume(5);//set volume,max=15 radio.setMono(false); radio.setMute(false); digitalWrite(4,LOW); i=0;} void loop() { if(digitalRead(ptt)==HIGH){ radio.setMute(true); while(k==0) { i2c_init(); delay(200); fmtx_set_freq(fm_freq); digitalWrite(4,HIGH); k=1; } i=1;} delay(100); if (i==1&&digitalRead(ptt)==LOW) { radio.setFrequency(10800); radio.setVolume(5); radio.setMono(false); radio.setMute(false); digitalWrite(4,LOW); k=i=0; } radio.getRadioInfo(&ri);//mute control if((ri.rssi)>=7) radio.setMute(false); else if((ri.rssi)<7) radio.setMute(true); delay(100);}