Homie Display

Several Homie node(s) that wrap different data sources and show them on an OLED display. This firmware currently contains four frames

• A status frame showing MQTT/Wifi status upon initialization and the current time when everything is up and running
• The current weather for a open weathermap location Id that you have configured, fetched via Open Weathermap
• A three day weather forecast for the same location
• Sensor values (e.g. temperature, humidity, pressure) fetched from a mqtt server using data as defined in Homie Node Collection v1.1.0 and newer.

The time zone, open weathermap URL and the mqtt topics for temperature/humidity are configurable

The software is based on Homie (v3.0) and is developed using PlatformIO

Dependencies

All dependencies are included via platformio.ini

Open Weathermap

It uses files copied from ESP8266 Weather Station to access the open weathermap API. These files are copied into the lib subdirectory. The entire weather station library is not included, because it has its own NTP client with a different interface than the one that I prefer.

Configuration

The following parameters are used to configure the display

Node	Parameter	Type	Usage
MqttNode	MqttServer	string	The MQTT server to which this node shall connect
MqttNode	MqttTopic	string	The MQTT topic to which this node shall listen
MqttNode	MqttTitle	string	The title that shall be shown on the frame
OpenWeathermap	OwmApiKey	string	Your open weathermap API key
OpenWeathermap	OwmLanguage	string	The language in which you want to retrieve the open weathermap data
OpenWeathermap	OwmLocationId	string	The location for which you want to retrieve the weather information
OpenWeathermap	OwmUpdate	long	The update interval in minutes for open weathermap (10 minutes to 1 day)

Case

A friend of mine printed this cute little case for me: Desktop Widget found on Thingiverse.

Current weather	Three day forecast	Rear view