In this tutorial, we interface 16x2 LCD with ESP32, using only 2 pins, with the help of I2C communication. It reduces number of pins used by ESP32 so that more number of ESP32 pins remain free for ...

Functional way to connect ESP32 to 16x2 LCD without I2C module, using 4-bit communication. Here is where the code stretch you should pay attention to as well as make the correct connections in board.

Upload esp32.py to the ESP32. Connect the 16x2 LCD to the ESP32: SDA to GPIO 21 SCL to GPIO 22 VCC to 3.3V or 5V (check LCD specifications) GND to GND. ##Configuration Vehicle Detection: MQTT_BROKER: ...

With the ESP32 wired between the handheld’s LCD and main PCB, the microcontroller can also act as a capture device using I2S camera mode.