Hello all,
I am using Two arduinos to communicate each other by using RTU485.
I have a program for a master (1st arduino) and other for the slave (2nd arduino).
I want to catch the value of “variable*” by using the slave where the master sending the values.*
The communication happens by using Serial 0 and 3.
My problem is the slave gave me a message of 0 17 0 17 0 17 …etc instead of the real message and I do not know why ??
please, see my code in both master and slave, and tell me if there is any error !! especially the slave code.
Is my message variable[] correct ??
Thanks alot.
here the code of the master:
int sensorPin = A0; // select the input pin for LDR
int sensorValue = 0; // variable to store the value coming from the sensor
int breaker = 50 ; // switch bin
int breakerValue = 0; // switch ADC value
int ledPin = 52; // Led pin to detect switch case
int enableBus = 8;
byte variable[] = {0x11,0x06,0x00,0x02,0x64,0xD8};
int x, y;
void setup()
{
Serial.begin(9600);
Serial3.begin (9600);
pinMode(ledPin,OUTPUT);
**pinMode(breaker,INPUT); **
pinMode(sensorPin,INPUT);
pinMode (enableBus,OUTPUT);
delay(10);
}
void loop()
{
** sensorValue = analogRead(sensorPin); // read the value from the sensor**
** breakerValue = digitalRead (breaker);**
** x = sensorValue/256;**
** y = sensorValue%256;**
** variable[2]= x;**
** variable[3]= y;**
__ double Vout = sensorValue0.0048828125;
** int lux=(250/Vout)-50;**
** switch (breakerValue)**
{
** case HIGH:**
** {**
** Serial.println(lux); //prints the values coming from the sensor on the screen**
** digitalWrite (ledPin,HIGH);**
** if (Serial.available())**
** communication ();**
** delay(100);**
** break;**
** }**
** case LOW:**
** {**
** digitalWrite (ledPin,LOW);**
** delay(100);**
** break;**
** }**
** default:**
** break;**
**} **
}
void communication ()
{
** digitalWrite (enableBus, HIGH);**
** for(int i=0;i<sizeof(variable);i++)**
** {**
Serial3.write (variable);
Serial3.flush();
}
digitalWrite (enableBus, LOW);
}*__
[/b]
here the code of the slave:
int enableBus = 8;
byte B;
void setup ()
{
** Serial.begin (9600);**
** Serial3.begin (9600);**
** pinMode (enableBus, OUTPUT);**
** delay (10);**
}
void loop ()
{
** while(Serial3.available())**
** {**
** digitalWrite (enableBus,HIGH);**
** B= Serial3.read ();**
** Serial.write (B);**
** Serial.println (B);**
** Serial.flush ();**
** digitalWrite (enableBus,LOW);**
** }**
}