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raspi-gpio-mqtt

A little app written in Go to watch for changes to GPIO pins on the Raspberry Pi and relay them to an MQTT topic.

The app uses the os.select() to receive changes from the kernel rather than polling to keep CPU usage to a minimum. It also debounces the input so that the MQTT topic does not get spammed.

Dependencies: github.com/brian-armstrong/gpio, github.com/eclipse/paho.mqtt.golang

Setup

git clone git@github.com:heathbar/raspi-gpio-mqtt.git
cd raspi-gpio-mqtt
go get
go build

# root/sudo is required to access the GPIO pins on the raspberry pi. 
sudo ./raspi-gpi-mqtt -b tcp://my-mqtt-server.com:1883

systemd

sudo cp ./raspi-gpio-mqtt.service /etc/systemd/system/
sudo systemd enable raspi-gpio-mqtt
sudo systemd start raspi-gpio-mqtt

TODO

  • mqtt security
  • mqtt QoS
  • configurable debounce timeout

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A little app to watch for changes to GPIO pins on the Raspberry Pi and send them to an MQTT topic written in Go

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