A quick video on how to build the hub 3 at home with a simplified Hub3 source code. Get 10 PCBs for $5 USD at Buy the Hub3 PCB - Source code is available for download to my YouTube channel members as part of your membership benefits! Access it here: Join the channel - Shopping for D1 Mini? ================== ■ Amazon - ■ AliExpress - Hub 3 - Hub 2 - Ultra Low Power Door Sensor - Music by Coma-Media from Pixabay The links above usually are affiliate links that support the channel (no additional cost for you).