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[Arduino] Checking if the room light is on from the outside. Building a "Door-Through Lighting Indicator" that runs with auto-calibration and ultra-low power consumption

Have you ever been in a situation, whether in a conference room, a private office, or a room in your own home, where you can't tell if someone is inside (or if the light is on) from the outside ...
GitHub

BLKLab_Code_Tao_Bo_Dem_Don_Gian_Bang_Arduino.ino

const int APin=6; //Khai báo và khởi tạo APin với chân số 6 const int BPin=7; //Khai báo và khởi tạo BPin với chân số 7 const int DPPin=8; //Khai báo và khởi tạo DPPin với chân số 8 const int CPin=9; ...
GitHub

esp32-hal-rgb-led.c

// you may not use this file except in compliance with the License. // You may obtain a copy of the License at // http://www.apache.org/licenses/LICENSE-2.0 ...