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 | ____

_______ | | __

      | | | | | . . |
   GND__| | | . . |
      | | | | . . |
   VCC | | . . |
      | | | . . |
  DATA | . . |

| . . |

 . . |
 . . |
 . . |
 . . |
 . . |
 . . |

39| . . _______|

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