This Marlin v1.9 pendant was made using micropython to control an Marlin board (tested on the Arduino MEGA2560 + RAMPS V1.4) the ESP32 uses Serial Port 2 to communicate with the RAMPS aux port.
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This Marlin v1.9 pendant was made using micropython to control an Marlin board (tested on the Arduino MEGA2560 + RAMPS V1.4) the ESP32 uses Serial Port 2 to communicate with the RAMPS aux port.