Communication between 2 Arduino with HC05 and HC06 modules - bluetooth

Question

I want to perform a bluetooth communication between 2 Arduino with HC05(master) and HC06 (slave). I success with the pairing of the 2 modules, but when i send a byte that i read from a potentiometer, the slave receive another value, that can be 128, -1, 248. Below there are the Arduino's codes
Arduino master HC05
#include <SoftwareSerial.h>
SoftwareSerial BTserial(2, 3); // RX | TX
// Connect the HC-05 TX to Arduino pin 2 RX.
// Connect the HC-05 RX to Arduino pin 3 TX through a voltage divider.
int potpin = 0; // analog pin used to connect the potentiometer
void setup()
{
// start the serial communication with the host computer
Serial.begin(9600);
Serial.println("Arduino with HC-05 is ready");
// start communication with the HC-05 using 9600
BTserial.begin(9600);
Serial.println("BTserial started at 9600");
}
void loop()
{
BTserial.println(analogRead(potpin));
delay(100);
Serial.println(analogRead(potpin));
}
Arduino slave HC06
#include <SoftwareSerial.h>
#include <Servo.h>
Servo myservo;
SoftwareSerial slave(2, 3); // RX | TX
// Connect the HC-05 TX to Arduino pin 2 RX.
// Connect the HC-05 RX to Arduino pin 3 TX through a voltage divider.
int c = 0;
int val;
void setup()
{
// start the serial communication with the host computer
Serial.begin(9600);
Serial.println("Arduino with HC-06 is ready");
// start communication with the HC-05 using 9600
slave.begin(9600);
Serial.println("BTserial started at 9600");
myservo.attach(9);
}
void loop()
{
if (slave.available())
{
val= slave.read();
Serial.println(val);
val = map(val, 0, 1023, 0, 180);
myservo.write(val);
delay(15);
}
}
Thank you for every answer

Answer 1

In slave sketch you should replace slave.read() with parseInt().
The read() function will read a single byte. When master sends the integer value potpin=130, the function println(potpin) will convert it to 3 bytes (coded as ascii character), and will send them. On the slave side you have to read all incoming bytes, stored in string, and convert string in integral variable. parseInt() will do that in a single row.