Geeetech

Uh. No, I didn't disconnect the endstop.
Maybe that will do the trick. I test it in the evening.

I used the Firmware from here: https://www.geeetech.com/download.html?version_id=218

And as I stated: Update seems all right (after all I can see on the screen).

Do I have to clear the EEPROM in one ...

I try to get the Sensor working on a A10T.
I stuck with the Firmware I think.
I pushed the .hex-File by using the Firmware-Tool. Everything seems all right (erasing Firmware, uploading Firmware).
At the end there is nothing different (e.g. the "test"-option for the sensor in the menu is still not ...