Build a DIY, Cloud-Free Smart Home Keypad
Smart home enthusiasts have plenty of choices when it comes to wireless buttons, motion sensors, and door contacts. Keypads are another story. Commercial options are few and far between, and those that are available tend to be tied to proprietary ecosystems, require mains power, or cost considerably more than other home automation tools.
Dominic Buchstaller wanted a simple keypad for his front door that wouldn’t send data to a black box in the cloud or require any wiring. Is that too much to ask? Apparently it is, so he had to build his own. Simply called the Zigbee Touch Keypad, Buchstaller’s PEZ dispenser-sized device runs for six months on a single battery charge and can be wirelessly integrated into existing smart home systems.
A keypad installed by the front door (📷: Dominic Buchstaller)
The keypad is built around an ESP32-C6 development board paired with an MPR121 capacitive touch controller, creating...
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