yarpi433

Introduction

Python script for sending 433MHz signals with generic low-cost GPIO RF modules on a Raspberry Pi.

I first sniffed remote controler signal with gqrx with my rtl-sdr USB key (820T2) tuned around 433MHz.

Once the acquisition were right, I retroengineered the protocol with audacity which happened to be a simple on-off keying modulated signal.

Lastly, I implemented this into a python script using my Raspberry Pi 1 GPIOs.

Supported hardware

Most generic 433MHz capable modules connected via GPIO to a Raspberry Pi.

Compatibility

This is compatible with my garage barrier.

Dependencies

RPi.GPIO

Installation

On your Raspberry Pi, clone this repository.

Wiring diagram

Raspberry Pi 1/2(B+):

                   RPI GPIO HEADER
              ____________
             |        ____|__
             |       |    |  |
             |     01|  . x  |02
             |       |  . .  |
             |       |  . .  |
             |       |  . .  |
   TX        |   ____|__x .  |
 _______     |  |  __|__x .  |
|       |    |  | |  |  . .  |
|    GND|____|__| |  |  . .  |
|       |    |    |  |  . .  |
|    VCC|____|    |  |  . .  |
|       |         |  |  . .  |
|   DATA|_________|  |  . .  |
|_______|            |  . .  |
                     |  . .  |
                     |  . .  |
                     |  . .  |
                     |  . .  |
                     |  . .  |
                     |  . .  |
                   39|  . .  |40
                     |_______|

TX module:
   GND > PIN 09 (GND)
   VCC > PIN 02 (5V)
  DATA > PIN 11 (GPIO17)

Usage

Once you entered the right code and configured the script, you can open the barrier by running:

# python3 TX.py open_code

Open Source

• The code is licensed under the GPLv3 Licence