Arduino nano and ZMR BLHeli ESC

[adras]

I'm trying to connect my arduino nano to my ZMR BL-HELI ESCs. Like these: https://www.aliexpress.com/item/1005005432982819.html

However, they best I can achieve, is that the ESC starts constantly beeping once I try to read the values. Or the ESC makes of 4 tone sound with lowering tone.

Worst case option, slice them up and flash a new firmware, but I don't want to do that. I'd rather prefer writing some code that does transmitter programming. Did somebody ever do this before?

Why do I always end up with these unconfigurable BLHeli ESCs.....