Wireless serial communication. Sending 4 different continuous values

Question

I am trying to control 4 motors using 2 joysticks.

I want to send continuous analog values of 2 joysticks (x & y both).

I am using bluetooth HC-05. I am using the basic logic that is sending a character before each analog value and thus sending all 4 values.

My problem here is at the reception end, data is not received correctly. Error rate is very high.

Is their any other way or improved program to do that?

//this is my part of the code at the transmitter side

#include <SoftwareSerial.h>
int a,b,c,d;
int ry = A0; // forward backward
int rx = A1;//rotate
int lx = A3; //right left
int ly = A4;
SoftwareSerial blu(10, 11); // TX,RX

void setup() {
  Serial.begin(9600);
  blu.begin(9600);
}

void loop() 
{

   a = analogRead(ry)/4;
   d = analogRead(rx)/4;
   c= analogRead(ly)/4
   b = analogRead(lx)/4;

   blu.write("w");
   blu.write(a);
   blu.write("x");
   blu.write(b);   
   blu.write("y");
   blu.write(c); 
   blu.write("z");
   blu.write(d); 
      }

}

// Code at the reciever side

#include <SoftwareSerial.h>

SoftwareSerial mySerial(12,13); // tx,rx

void setup()
{
  Serial.begin(9600);
  mySerial.begin(9600);
  digitalWrite(gnd1 , LOW);
  digitalWrite(gnd2 , LOW);

  pinMode(motor1, OUTPUT);
  pinMode(motor2, OUTPUT);

  pinMode(dir1, OUTPUT);
  pinMode(dir2, OUTPUT);
  pinMode(dir_1, OUTPUT);
  pinMode(dir_2, OUTPUT);

}

void loop()
{
    if (mySerial.available())
  {
    a=mySerial.read();
        if(a=='w' || z=='x' || a=='y' || a=='z')
        {
          if(a=='w')
        c_b=mySerial.read();
        b=map(c_b,0,255,-255,255);
        motorspeed1(b);
      }
   if(a=='x'){

            int c_c=mySerial.read();
            b=map(c_c,0,255,-255,255);
            motorspeed2(c);

          }
if(a=='y'){
 int c_d=mySerial.read();
            d=map(c_d,0,255,-255,255);
            motorspeed3(d);
  } 
if(a=='z'){
 int c_e=mySerial.read();
            e=map(c_e,0,255,-255,255);
            motorspeed3(e);

}
}

//motor speed function takes care of the direction and the pwm. my problem is at the receiving end the values are not proper . error is very high mySerial.read() gives false values

Wireless serial communication. Sending 4 different continuous values

0 Answers0