ESP32-CAM是采集眼动数据的，接着通过串口或者网络把这个数据传到电脑里面，这个时候有一个Python后端在运行，把视频流解码，然后使用一个上位机来控制这个后端。

Take the ESP32-CAM, a board that started appearing on the market in early 2019. On paper, the thing is amazing: an ESP32 with support for a camera and an SD card, all for less than $10.