ESP32 Prayer Rakat Counter (HC-SR04 + SSD1306 OLED + 2 Buttons)

Do you sometimes forget how many rak’ahs you’ve prayed while performing salat? This project creates a rak’ah counter that is placed next to your prayer mat and counts your prostrations when you bring your hand close to it. The HC-SR04 ultrasonic distance sensor detects hand proximity, the SSD1306 OLED display shows the rak’ah count, and you can select 2, 3, or 4 rak’ahs and reset the count using two buttons. It features a smart state machine with a 2.5-second debounce and a “hand-away” algorithm