Using the ESP32’s I2S peripheral in parallel mode makes it possible to shift data out in the correct format to drive the LCD without bit-banging IO pins and using up precious CPU time.

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.

ESP32-S3-LCD-1.47 is available for purchase through Waveshare's official store for $12.99 plus shipping. Additional information and a setup guide can be found on the Waveshare Wiki page.