I am attempting to connect an Arduino Uno to a Modern Device RBB Arduino. One is the base and the other the remote. They need to set up a simple handshake to communicate an on and off condition from the remote.The hardware and software work for both the base and remote using Tera Term to simulate the opposite node. I am running Tera Term on a notebook connecting to the node through a BT dongle. In other words if I manually respond to the opposite node on the Tera Term they both operate as they should individually. When I try to get them to interact autonomously they will not handshake. The HC05s are paired and connected but the handshake data will not flow back and forth.
Remote Code:
int pinInt =2; //interrupt pin
int ack = 2; //acknowledge
void setup() {
pinMode(3,OUTPUT); //power to bluetooth
pinMode(pinInt,INPUT); //interrupt pin mode
}
// Still needs sleep and interrupt processing
void loop() {
delay(5000);//sim sleep remove or adjust for wake up delay
digitalWrite(3,HIGH);//switches power to bluetooth
delay(10000);//BT active adjust as necessary
Serial.begin(9600);
Serial.print('?');//send am I connected
while(Serial.available()==0){}//idle until incoming serial
int heatCall=digitalRead(pinInt);//read interrupt pin
if (Serial.available() > 0) {ack = Serial.read();}//read ack
if (ack=='1'){Serial.print(heatCall);}//send state of heatCall
while(Serial.available()==0){}//idle until incoming serial
if (Serial.available() > 0) {ack = Serial.read();}//read ack
if (ack=='0'){Serial.end();digitalWrite(3,LOW);}//BT off
//sleepNow();//put back to sleep
}
Base Code:
int relayPin =13; //relay pin
char itsOn = 0; //remote calling variable
int heatCall = 0; //state of TH135
int ack = 2; //hand shake
void setup() {
pinMode(relayPin,OUTPUT); //power to relay
Serial.begin(9600);
}
void loop() {
while (Serial.available()==0);{}//idle until incoming serial
if (Serial.available() > 0) {itsOn = Serial.read();//remote calling
if (itsOn=='?')ack=1;Serial.print(ack);}//send connected ack
while (Serial.available()==0);{}//idle until incoming serial
if (Serial.available() > 0) {heatCall = Serial.read();}//incoming heatCall
if (heatCall=='1'){digitalWrite(relayPin,HIGH);}//turn zone relay ON
else {digitalWrite(relayPin,LOW);}//turn zone relay OFF
delay(5000);
ack=0;
Serial.print(ack);//turn remote BT OFF
}
Is there some BT protocol that I am missing?
UPDATE: I have determined that data is being transferred from remote to base and back. The data is not the expected values.
