RF433 Receiver

Projects Programming
1

Hello, I have some time to research and find no solution for any site and see if you can help me. When command messages from arduino I can see them in the raspberry, but not another Arduino, I have tested hundreds of codes and no way. I've tried RCSwitch libraries and "VirtualWire" but there is no way you can read what command RF. I tested with several receivers and it is nothing of the receiver.

2

Here are two slightly modified examples found in the "VirtualWire" library. Test them!
Don't forget to change the #defines

Receiver:

// receiver.pde
//
// Simple example of how to use VirtualWire to receive messages
// Implements a simplex (one-way) receiver with an Rx-B1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@airspayce.com)
// Copyright (C) 2008 Mike McCauley
// $Id: receiver.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

#define RF_RX_Pin 8
#define LED 13

void setup()
{
    Serial.begin(9600);	// Debugging only
    Serial.println("setup");

    vw_set_ptt_pin(false);            
    vw_set_rx_pin(RF_RX_Pin);  
    vw_setup(2000);	 // Bits per sec
    vw_rx_start();       // Start the receiver PLL running
}

void loop()
{
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN;

    if (vw_get_message(buf, &buflen)) // Non-blocking
    {
	int i;

        digitalWrite(LED, true); // Flash a light to show received good message
	// Message with a good checksum received, dump it.
	Serial.print("Got: ");
	
	for (i = 0; i < buflen; i++)
	{
	    Serial.print(buf[i], HEX);
	    Serial.print(" ");
	}
	Serial.println("");
        digitalWrite(LED, false);
    }
}

transmitter:

// transmitter.pde
//
// Simple example of how to use VirtualWire to transmit messages
// Implements a simplex (one-way) transmitter with an TX-C1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@airspayce.com)
// Copyright (C) 2008 Mike McCauley
// $Id: transmitter.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

#define RF_TX_Pin 9
#define LED 13

void setup()
{
    Serial.begin(9600);	  // Debugging only
    Serial.println("setup");

    vw_set_tx_pin(RF_TX_Pin);
    vw_setup(2000);	 // Bits per sec
}

void loop()
{
    const char *msg = "hello";

    digitalWrite(LED, true); // Flash a light to show transmitting
    vw_send((uint8_t *)msg, strlen(msg));
    vw_wait_tx(); // Wait until the whole message is gone
    digitalWrite(LED, false);
    delay(200);
}
3

I can see them in the raspberry, but not another Arduino,

It sounds like there is a RaspberryPi involved.

Is the Raspberry the sender or the receiver? What kind of Arduino is the other one?

Mr Google also came up with this http://www.homautomation.org/2013/09/21/433mhtz-rf-communication-between-arduino-and-raspberry-pi/

Have you posted your question in the Raspberry Pi forum https://www.raspberrypi.org/forums/

4

giova014:
Here are two slightly modified examples found in the "VirtualWire" library. Test them!
Don't forget to change the #defines

Receiver:

// receiver.pde

//
// Simple example of how to use VirtualWire to receive messages
// Implements a simplex (one-way) receiver with an Rx-B1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@airspayce.com)
// Copyright (C) 2008 Mike McCauley
// $Id: receiver.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

#define RF_RX_Pin 8
#define LED 13

void setup()
{
    Serial.begin(9600); // Debugging only
    Serial.println("setup");

vw_set_ptt_pin(false);           
    vw_set_rx_pin(RF_RX_Pin); 
    vw_setup(2000); // Bits per sec
    vw_rx_start();      // Start the receiver PLL running
}

void loop()
{
    uint8_t buf[VW_MAX_MESSAGE_LEN];
    uint8_t buflen = VW_MAX_MESSAGE_LEN;

if (vw_get_message(buf, &buflen)) // Non-blocking
    {
int i;

digitalWrite(LED, true); // Flash a light to show received good message
// Message with a good checksum received, dump it.
Serial.print("Got: ");

for (i = 0; i < buflen; i++)
{
    Serial.print(buf[i], HEX);
    Serial.print(" ");
}
Serial.println("");

digitalWrite(LED, false);
    }
}




transmitter:

// transmitter.pde
//
// Simple example of how to use VirtualWire to transmit messages
// Implements a simplex (one-way) transmitter with an TX-C1 module
//
// See VirtualWire.h for detailed API docs
// Author: Mike McCauley (mikem@airspayce.com)
// Copyright (C) 2008 Mike McCauley
// $Id: transmitter.pde,v 1.3 2009/03/30 00:07:24 mikem Exp $

#include <VirtualWire.h>

#define RF_TX_Pin 9
#define LED 13

void setup()
{
    Serial.begin(9600);   // Debugging only
    Serial.println("setup");

vw_set_tx_pin(RF_TX_Pin);
    vw_setup(2000); // Bits per sec
}

void loop()
{
    const char *msg = "hello";

digitalWrite(LED, true); // Flash a light to show transmitting
    vw_send((uint8_t *)msg, strlen(msg));
    vw_wait_tx(); // Wait until the whole message is gone
    digitalWrite(LED, false);
    delay(200);
}

I used this codes, but when i open serial monitor i only see "setup".

I will COM3 to put the code receiber, then I will COM4 to put the code transmitter, back to COM3 and see only "setup".

5

What RF modules are you using (model / picture)? How is the wiring (diagram / schematic / hand drawing)? Have you tested with multiple RF modules?

6

Please post:

  • Links to TX and RX modules you're using.
  • Sketches you're using to test, on both sides. (the exact sketch you're sending, please)
  • Wiring diagram of all devices.
  • What type of arduino you are using on each side?
7

I have found the fault. The problem is that it puts but refers pin 0 to pin 3 of Arduino.

Now I have a new problem. I cant send and receive in same Arduino, I only can send, when i send a message from other device didn't receive the message.

I'm using this RF: 433MHz RF Transmitter Wireless Module for Arduino - Blue + Yellow - Free shipping - DealExtreme
I'm using nano arduino: http://www.dx.com/p/new-nano-v3-0-module-atmega328p-au-improved-version-for-arduino-yellow-369070

Thank you very much!!