I built a custom system with a NodeMCU, a microphone sensor and a vma320 that sends me a text message to my phone whenever the alarm is going off. Pretty handy when I’m away. It’s pretty ...

As usual I’ll be using a NodeMCU board (I really did order a lot of them) which uses an ESP8266, but there’s no reason this would be difficult to achieve on an Arduino-based device.

The NodeMCU development board is a powerful solution to program microcontrollers and be part of the Internet of Things (IoT). The NodeMCU development board, based on ESP8266EX, is a cute module with a ...