Unable to receive integers while using transmitter and receiver 433mhz module

Projects General Guidance
1

Hi i have been using transmitter and receiver module for ardiuno,I am able to transmit and receive data but the integers that i received are coming in wierd characters in the serial monitor,I have uploaded the code pls tell me whats wrong thanks
//RECEIVER

// RadioHead - Version: Latest
#include <RH_ASK.h>
#include <SPI.h>

RH_ASK driver;

void setup()
{
Serial.begin(9600);
if (!driver.init())
Serial.println("init failed");
}

void loop()
{
uint8_t buf[12];
uint8_t buflen = sizeof(buf);
if (driver.recv(buf, &buflen))
{
int i;
Serial.print("Message: ");
Serial.println((char*)buf);
}
}
transmitter code
#include <RH_ASK.h>
#include <SPI.h>

RH_ASK rf_driver;
int Ypin=A0;
int Yval;
void setup()
{
// Initialize ASK Object
rf_driver.init();
// Setup Serial Monitor
Serial.begin(9600);
pinMode(Ypin,INPUT);
}

void loop(){
Yval=analogRead(Ypin);

const char *msg = Yval;
rf_driver.send((uint8_t *)msg, strlen(msg));
rf_driver.waitPacketSent();

// Message Transmitted
Serial.print("Message Transmitted: ");
delay(100);
Serial.println(Yval);

}
note- i am just using y value of the joystick just to accelerate my dc motar but i havent uploaded my dc motar code as integers are not being able to be received properly, i am pretty sure i have a problem converting the data into bits i think because string values are easily being able to be received and transmitted without error,i have also tried virtual wire but the msgs are not being transmitted in that too.

2

Please edit your post to add code tags.

Here is one way to send an integer value (as binary):

Yval=analogRead(Ypin);
rf_driver.send((uint8_t *)&Yval, 2); //two bytes on AVR Arduino

and receive:

int value=0;
int buflen = 2; // max number of bytes allowed in message
if (driver.recv((uint8_t *) &value, &buflen))
  { if (buflen == 2)  //got correct message size?
     {  // do something with "value"
2 Likes
3

hello an error is coming,it says driver was not declared in scope

4

^^^ this prob

5

it is happening in the receiver side the transmitter code is working :slight_smile:

6

#include <RH_ASK.h> // Include RadioHead Amplitude Shift Keying Library
#include <SPI.h> // Include dependant SPI Library

// Create Amplitude Shift Keying Object
RH_ASK rf_driver;

void setup()
{
// Initialize ASK Object
rf_driver.init();
// Setup Serial Monitor
Serial.begin(9600);
}

void loop()
{
int value=0;
int buflen = 2;
if (driver.recv((uint8_t *) &value, &buflen))
{ if (buflen == 2)
{
Serial.println(value);
}
}
}

7

Please use code tags when posting code.

Corrected call is "rf_driver.recv()" :

if (rf_driver.recv((uint8_t *) &value, &buflen))
   { if (buflen == 2)
      {
        Serial.println(value);
       }
   }
8

its still showing an error
#include <RH_ASK.h> // Include RadioHead Amplitude Shift Keying Library
#include <SPI.h> // Include dependant SPI Library
RH_ASK rf_driver;
void setup()
{
rf_driver.init();

Serial.begin(9600);
}

void loop()
{
int value=0;
int buflen = 2;
if (rf_driver.recv((uint8_t ) &value, &buflen))
{ if (buflen == 2)
{
Serial.println(value);
}
}
error is- no matching function for call to 'RH_ASK::recv(uint8_t, int*)'

9

hello sorry will do so from now on and thanks a lot for your help :slight_smile:

10

receiver part is a little tricky i always find an error in that

11 
uint8_t buflen = 2;

At some point, you should actually read and make an attempt to understand the error messages.

12

yes i know i am sorry i am a new to ardiuno and unfamiliar with transmitter library :pensive: thanks a lot for your help tho :slight_smile:

13

i am so happy it finally worked thanks alot i couldnt have done it without your help :slight_smile: ill try to get better in it

14

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