I use outdoor wireless sensors to capture temperature, wind, and light intensity. This projects uses the following…
Adafruit has a great tutorial on signal capture and the hardware needed. The radio I used is from nooelec.
The following commands will setup and install the rtl-433 libaries on a pi.
sudo apt -y install git libtool libusb-dev librtlsdr-dev rtl-sdr build-essential autoconf cmake pkg-config mkdir -p $HOME/git cd $HOME/git if [[ ! -d "$HOME/git/rtl_433" ]]; then git clone https://github.com/merbanan/rtl_433.git; fi cd rtl_433 && git pull if [[ ! -d "$HOME/git/rtl_433/build" ]]; then mkdir build; fi if [[ -d "$HOME/git/rtl_433" ]]; then cd build && cmake ../ && make; fi if [[ -d "$HOME/git/rtl_433" ]]; then sudo make install; fi
Once the rtl_433 libaries are built and installed, typing ‘rtl_433 -D’ from a cmd shell will start capture until ctrl-c.
echo '#!/bin/bash' > $HOME/getSensorData.sh which rtl_433 | xargs -I {} echo 'APP='{} >> $HOME/getSensorData.sh echo '$APP -T 90 -F "mqtt://farmpi:1883"' >> $HOME/getSensorData.sh chmod +x $HOME/getSensorData.sh (crontab -l; echo '0 * * * * /home/pi/getSensorData.sh';) | crontab
Retart cron by sudo /etc/init.d/crond restart status Edit crontab by crontab -e
https://github.com/merbanan/rtl_433/ https://www.adafruit.com/product/1497 https://triq.org/rtl_433 https://www.nooelec.com/ https://www.rtl-sdr.com/ https://raspberrypiandstuff.wordpress.com/2017/08/04/rtl_433-on-a-raspberry-pi-made-bulletproof/