Hi! So i'm having quite a few issues with a particular part of my project.
So I have two ardunio boards, an Uno (embedded in the romeo control board by DFrobot) and a Mega2650.
I'm trying to send and receive some variables between them. All the variables are integers between 0-255. I'm not an expert and would like something simple and easy to implement into my code. I have already attempted to use Easy Transfer however after a few days of fiddling it is still not working on my system.
So all i need is an way of transferring multiple integer variables over serial. Im not afraid to use I2C however I am very inexperienced with it and already have a ultrasonic sensor setup and working on it, and would rather not tamper with something that is working perfectly.
I've used variations of the below serial code to communicate between two arduinos.
//zoomkat 3-5-12 simple delimited ',' string tx/rx
//from serial port input (via serial monitor)
//and print result out serial port
//Connect the sending arduino tx pin to the receiving arduino rx pin.
//Connect the arduino grounds together.
//What is sent to the tx arduino is received on the rx arduino.
//Open serial monitor on both arduinos to test
//A diode between the slave tx and master rx is suggested
//for isolation, with diode band attached to slave tx side.
//
String readString;
void setup() {
Serial.begin(9600);
Serial.println("serial delimit test 1.0"); // so I can keep track of what is loaded
}
void loop() {
//expect a string like wer,qwe rty,123 456,hyre kjhg,
//or like hello world,who are you?,bye!,
if (Serial.available()) {
char c = Serial.read(); //gets one byte from serial buffer
if (c == ',') {
if (readString.length() >0) {
Serial.print(readString); //prints string to serial port out
Serial.println(','); //prints delimiting ","
//do stuff with the captured readString
readString=""; //clears variable for new input
}
}
else {
readString += c; //makes the string readString
}
}
}