Homematic - Temperature Sensor V2

Housing for a home-brew Homematic temperature sensor.

I did use the following components:

PCB: https://github.com/TomMajor/AskSinPP_Examples/tree/master/PCB/Sensor_PLHT
Arduino Pro Mini 3.3V: https://www.aliexpress.com/item/Free-shipping-improved-version-of-pro-mini-electronic-building-blocks-Interactive-Media-ATMEGA328P-5V-16M/1298250308.html
Battery holder: https://www.amazon.de/gp/product/B07HT39G17
Sensor BME280: https://www.aliexpress.com/item/I2C-SPI-GY-BMP280-3-3-Digital-Baromet