[Reza’s] methodical investigation of this remote ... with an Arduino using a 433 MHz transmitter. This is a single-device unit, but the techniques used here should allow you to take control ...

There’s no interaction with the remote servers when operating the user interface so there is no need for an external Internet connection. The system supports Arduino and ESP controllers.

This video demonstrates how to set up a remote temperature monitoring system using an Arduino Uno R4 WiFi, an LM35 temperature sensor, and the MQTT protocol. The system captures ambient temperature ...