I bought this device so I would have a simple ANSI terminal to use for BBS fun. It is well designed and seems to have a nice feature set. The only problem I encountered is figuring out how to install different firmware on it for the various example modules, as it came with the Serial firmware installed. After a very frustrating experience trying to upload the different firmwares using Arduino, I finally figured out how to upload the firmware successfully. Now I have the Wifi terminal running, although it doesn't look great on a widescreen 16:9 monitor. I'm also still not sure what the single jumper on the board does, but I just leave it in the default position. But it works and is fun to use! Shipping to the US was relatively quick, although no information was available while in transit. But overall its a great value and great device. Can't wait to see what software improvements come in the future!
Response from fabgl | Nov. 10, 2020
To flash a new firmware just remove the jumper (that select GPIO2 or GPIO12 for TX out). It is not necessary to remove the ESP32 board.