Hello,
I'm trying to connect my remote controls via serial connection to my PC.
Both MX700 and MX200 are working flawlessly in remote control function.

But I cannot get a working PC connection for some re-programming I want to do. Error code 102-27UU-0000 is displayed some seconds after clicking "upload/download or "firmware version".
However, the MX-200 starts blinking the red LED when clicking, and the MX-700 shows "Fail! 0" in the display bottom line. So I think there's some kind of connection established.
MX-Editor v1.12.267
I've tried two PCs, Win10 with USB-2-serial and ooold WinXP with onboard serial.
I tried different configurations of BAUD rate (9.600 to 115.200) and different settings (8N1, 7N1, x-on or no flow control, cache yes/no) but I cannot get any connection working.
I'm confused because I think it's unlikely that both remotes stopped connecting.
I assume that I'm doing something wrong... ;-)
Anybody here who has an idea?
Kind regards
Alex