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envirophat-mqtt

v1.0.2

Published

2 years ago

Publish sensor updates from Enviro pHat to MQTT

Downloads

10

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envirophat-mqtt

Publish sensor updates from Enviro pHat to MQTT

Calibrates the temperature reading for variance caused by heat from the CPU of the Raspberry Pi and smooths the data using a moving average.

A factor of 1.2 works well for me, but may vary depending on case and environment.

Running

sudo npm i -g envirophat-mqtt
envirophat-mqtt

Use PM2 or similar to run on startup.

Configuration

Create a config file at /etc/envirophatmqtt/config.yml

Check the available settings and defaults in config/defaults.yml.

Example:

---

mqtt:
  host: '192.168.0.123'
  topic: sensor/loune/input
temperature:
  factor: 1.2
interval:
  duration: 60000

Pre-requisites

Pimoroni libs: curl https://get.pimoroni.com/envirophat | bash
Node js

Why Node js?

Selfish reason: Because all my existing home automation runs on Node js managed with PM2.

Even though the provided libraries are Python, and it's pretty easy to publish to MQTT from Python, I wrote this so I could run my entire platform on Node js.