EspOledTemp is a little hardware device that I have built and designed myself. The goal has been to create a showcase for my knowledge in mainly electronics and programming.

The base for this build is a NodeMCU, a Soc based on ESP8266. It has a sensor for temperature and humidity connected, a HTU21D module. It also have an OLED connected for showing measured values, these values are also sent via Mqtt to a Mqtt-broker. The values are also presented via a dynamic webpage where you can see the values in near realtime.

The values sent via Mqtt is also used by other software, for example I built an Windows WPF application that shows the same values as the Oled.

The code is available at Github, In the code you also find how the parts are connected together, you won’t need a schematic.