- Wemos D1 mini (~$2)
- DL-20 Zigbee (CC2530). Module usually comes from Aliexpress with soldered 90 degree pins - need to solder "regular" pins. (~$8)
PCB designed for 70x45x30 mm box from Aliexpress (~$1)
Added optional place for 433Mhz module (WL101-341 and similar), pads and place in box for PWM modules (LR7843).
Look at image below with Wemos, DL20...
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