The timer tutorial is in English/Part 3 Multi-module Combination Course/3.9 Creating Timer. I liked the idea of making a timer with an alarm, so I went through Elegoo's guide for making one. I think ...

creating a simple project where two Arduino Uno R3 boards communicate wirelessly using the nRF24L01 modules. Let's create a simple project where two Arduino Uno R3 boards communicate wirelessly using ...