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auriol-reader

This repository contains AURIOL H13726 / Ventus W155 weather stations radio transmissions decoder application for Raspberry Pi. Application obtains data through a 433.92 MHz RF wireless receiver module (AUREL RX-4MM5++/F, simple chinese XY-MK-5V or other similar) connected to GPIO pin, decodes this data, prints it to stdout and saves in SQLite database.

auriol-reader-screenshot.png

Repository layout

  • doc - additional documentation
  • reader - decoder application
  • scripts - some scripts to make auriol-reader work continuously and start after reboot
  • www - some examples of primitive web pages showing data received by auriol-reader

Installation

  • This project uses Wiring Pi library (http://wiringpi.com/) so it should be installed first.
  • Secondly the libsqlite3-dev package is required.
  • Clone this repository, cd into reader directory, execute make and project should compile.

Running

  • connect receiver module output signal to Raspberry GPIO27
  • execute application with root privileges: sudo ./auriol-reader
  • observe decoded data on standard output and in /var/local/auriol-db.sl3 database

Additional notes

  • If different GPIO pin must be used check how pins are numbered in Wiring Pi (http://wiringpi.com/pins/) and modify constant RECIEVE_PIN in reader/auriol-reader.c source code file (e.g. GPIO27 is pin 2 in Wiring Pi).
  • If nothing is visible on stdout that means decoder cannot recognize incoming impulses and some calibration might be needed - please check reader/auriol-reader.c for constants SYNCHRO_LENGTH, SEPARATOR_LENGTH, ZERO_LENGTH, ONE_LENGTH, LENGTHS_MARGIN. Setting these constants to proper values is critical for the decoder to be able to recognize data in incoming transmissions from weather station instruments. Note that auriol-reader consumes 100% CPU (because of constantly polling GPIO pin connected to receiver hardware) and running other process with heavy CPU usage will result in slower GPIO polling so the decoder simply won't recognize data for given constants configuration. You may also want to tweak these values on newer, faster Raspberry Pi models (faster than my own Model B Revision 2.0).