Dash Button with Arduino Pro Mini

Here is another dash button for my FHEM SmartHome system. After building [this](https://www.thingiverse.com/thing:3678995) Dash Butten I wanted to build a new one with less power consumption, but as simple.
I've been following the [AskSinPP](https://asksinpp.de/) project for a long time, which does a great job in homematic compliant self-build equipment. The basis is usually an ATMega328 microcontroller which is available for less than 2 € at Ali.
Add to that a CC1101 868 MHz radio module and you can upload any sketches from [papa](https://github.com/pa-pa/AskSinPP) or [TomMajor](https://github.com/TomMajor/SmartHome). Then you can connect the device with Homematic or a Homematic compatible SmartHome environment.

What you needed:
- [Arduino ATMega328 Pro Mini 3.3V 8MHz](https://www.aliexpress.com/item/32821902128.html?)
- [CC1101 868 MHz](https://www.aliexpress.com/item/32852540940.html?)
- CR2032
- double-sided PCB
- [6x6x7 button](https://www.aliexpress.com/item/32983096592