Satnog arduino cnc project

Good morning all just one question.
Have built the Ardunio cnc project homing sequnce works fine and can mamualy enter AZ & El using ROTCTL with no problems.
When I use ROTCTLD and press engae on Gpredict it shows ERROR in READ box and then Hamlib disconnects.
My question is the project has no postion device included in the project so dose Hamlib/Gpredict require a response from the arduino on its postion and if so where dose it come from

many thanks

Peter(g4grk)

2 posts were merged into an existing topic: Satnogs CNC shield