I'm using an RF transmitter (434 MHz) to transmit analog inputs from a sensor to another Arduino using the virtual library. The transmitter seems to be working but the receiver is not getting anything .
The code wasn't compiling at first but then i made some changes in .CPP file and added some more header files
#include <Wire.h>
#include <VirtualWire.h>
#include <Serial.h>
then it compiled both the transmitter and the receiver here's the code
TRANSMITTER
#include <Wire.h>
#include <VirtualWire.h>
#include <Serial.h>
const int ledPin = 13;
const int Sensor1Pin = A0;
int Sensor1Data;
char Sensor1CharMsg[4];
void setup()
{
pinMode(ledPin,OUTPUT);
pinMode(Sensor1Pin,INPUT);
Serial.begin(9600);
vw_set_tx_pin(12);
vw_setup(2000);
}
void loop()
{
Sensor1Data = analogRead(Sensor1Pin);
itoa(Sensor1Data,Sensor1CharMsg,10);
digitalWrite(13, true);
vw_send((uint8_t *)Sensor1CharMsg, strlen(Sensor1CharMsg));
vw_wait_tx();
digitalWrite(13, false);
delay(200);
}
RECEIVER
#include <Wire.h>
#include <VirtualWire.h>
#include <Serial.h>
int ledPin = 13;
int Sensor1Data;
char Sensor1CharMsg[4];
void setup()
{
Serial.begin(9600);
pinMode(ledPin, OUTPUT);
vw_set_ptt_inverted(true);
vw_setup(2000);
vw_set_rx_pin(12);
vw_rx_start();
}
void loop(){
uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;
if (vw_get_message(buf, &buflen))
{
int i;
digitalWrite(13, true);
for (i = 0; i < buflen; i++)
{
Sensor1CharMsg = char(buf*);*
* }*
* Sensor1CharMsg[buflen] = '\0';*
* Sensor1Data = atoi(Sensor1CharMsg);*
* Serial.print("Sensor 1: ");*
* Serial.println(Sensor1Data);*
* digitalWrite(13, false);*
* }*
}
The code seems to be fine but the receiver is not giving any output on the Serial monitor neither is the LED lighting.
I checked voltage values of the data pin of the receiver it gave a high output for a high input at the transmitter but for a low input at the transmitter, receiver data pin is oscillating between high and low using a multimeter it gave something 1.5 to 1.6 volts but when i checked it on the analog input pin of arduino it was oscillating, it was either 1023 or 0 . My guess is the RF pair is not working fine at low inputs but any help to make it work will do.or any other library to make my RF pair work will help a lot
Thanks
Salahuddin