Here I'll try to explain and show how I made this custom alarm panel for Home Assistant with a NodeMCU ESP8266. We'll start with the Keypad, in this case, I will be using a 4x4 one, you can use a 4x3 ...

A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open switches connect a row to a column when ...

The smart home revolution has changed the way we think about our own abodes and has ushered in a new era of home security, with door lock with keypad becoming one of the best ways to lock up our homes ...