TLDR: An IoT sensor for temperature and humidity sending its values to a local MQTT server. Measuring interval and thresholding easy to configure. So much to write about a pretty small device and less than 100 lines of code including configuration, prints and comments. Hope you enjoy it! 🙂 I really like building and writing…
TLDR: Measures temp&hum in a configurable interval and with variable thresholds. Publishes to a mqtt server. Neopixels react to json data at a mqtt topic it is configured to subscibe. Single thread async implementation. Robust wifi and mqtt routines. Code at my github: https://github.com/worksonmymachine-de/iot_temptumsensor_ambilight This device is placed behind my main monitor and reads temperature…
It measures the temperature, humidity and open status of a window and send the values to the local MQTT broker if the values have changed (enough). The D1 got a nice housing on a solderable breadboard. The sensor cables can be plugged and unplugged into sockets on the breadboard. So I can easily exchange the…
This sounds trivial – and it is. When you know how to do it 🙂 There’s an example on the Node-RED homepage splitting a message generated from CSV, but this isnt the case here. I somehow did miss the point – if there is one made in the documentation – of how to split a…
a.k.a. longest post title ever 😛 This is the Python code for a NodeMCU v3 running MicroPython 1.19.1. It will measure temperature and humidity at the connected DHT22 with breakout board every 30 seconds, connect to WiFi and publish to a MQTT server.The first code block will be the necessary as simple and clear as…