Yesterday i got my hands on an FGR-233 with firmware 5.1 which i bought just for testing.
I can verify that it works perfectly with openhab.
The device calibrated on first time.
and the location is reported correctly as soon as the roller shutter stops.
You will have 3 controls blind control, blind control 1 and blind control 2
make sure you are using blind control 1.
“blind control” 2 will do nothing (i guess this is for lamella position which i don’t have) (exactly same behavior as fgr-222 - “lamella position”)
“blind control” will move the shutter but will not update blind control 1, and manual switches will not update its value as well (exactly same behavior as fgr-222 - “shutter position”)
good luck everyone