Dash Button DIY with ESP-01

thingiverse

I've been searching for a DIY dash button for my FHEM SmartHome system for quite some time. On Thingiverse, I found this [ESP8266 IoT Wifi] button (https://www.thingiverse.com/thing:2803769) that caught my eye. The design of the case and the ability to operate it via MQTT really appealed to me. Since I had ESP-01 and CR2032 at home, I decided to get started on the project. Here are the components: * [ESP-01](https://de.aliexpress.com/item/32688280601.html?) * CR2032 * [Button 6x6x8](https://de.aliexpress.com/item/32948674770.html?) * [Double-sided PCB](https://de.aliexpress.com/item/32575817684.html?) * [Silver wire](https://www.amazon.de/gp/product/B0043DQ7WK/ref=ox_sc_act_title_1?) First, I cut a rectangle from the PCB (about 56mm x 22mm) and rounded the corners to fit it into the case. I placed the button so that it sits under the movable end of the lid, about 16mm from the head of the inner wall. Since I didn't have a holder for the CR2032 battery, I made one out of silver wire. The circuit is quite simple and should be easy to solder even if you don't have much experience. Before soldering the ESP-01, it needs to be programmed. Make sure to test the ESP-01 before installation, as it can't be reprogrammed after soldering (or only with great effort). Next, remove the red power LED, then the ESP-01 can be wired. It may help to use a piece of perfboard between the spacers and the board installed (as shown in the photos). This brings me to 4mm distance between the ESP-01 and the motherboard. Have fun! Thanks to jepler for translating