ESP32/MicroPython server + Raspberry Pi/Python client, transmit image via WiFi TCP socket.

ESP32/MicroPython play the role of AP, act as socket server. Raspberry Pi connect to ESP32 WiFi network, run Python code to load image, act as client and transmit the image to ESP32 server. The ESP32 server display the image on a 240*240 IPS (ST7789 SPI) LCD.
https://helloraspberrypi.blogspot.com/2021/04/esp32micropython-server-raspberry.html .