Ard <--> Pi serial data transfer(unsolved)

Using Arduino Networking, Protocols, and Devices
24

This is how I would do it on the Arduino end. I would use sscanf on the RPI side. I added a 1 second delay so I could see it work.

char sendBuf[48];
char tBuf[16];

double yaw = 87.96;
double pitch = -114.58;
double roll = 100.50;

void setup(){
 Serial.begin(57600); 
 Serial3.begin(57600); 
}

void loop() {
    dtostrf(yaw,2,2,sendBuf);
    
    dtostrf(pitch,2,2,tBuf);
    strcat(sendBuf,",");
    strcat(sendBuf,tBuf);
    
    dtostrf(roll,2,2,tBuf);
    strcat(sendBuf,",");
    strcat(sendBuf,tBuf);

    sBuff();
    localSerial();

    delay(1000);
}

void sBuff(){
   Serial3.println(sendBuf);
}
void localSerial(){
    Serial.println(sendBuf);
}

edit: I moved yaw, pitch, and roll to global so you can load them up in another function.