This script uses the scaled output from the antennatracker servos and map them to corresponding Pelco-D messages to be sent via a RS-485 interface to a motorized base (can be anything from motorized tracker to a PTZ camera).
If your FCU doesnt offer a RS-485 interface by default, you can use or TTL-RS485- or USB-RS485-adapters.
Pelco-D allows to control using either speed-/differential- or absolute-control control of the pan-/tilt-axis.
Currently the script uses speed based control using by mapping the "ContinuousRotation" type servos outputs to the corresponding Pelco-D messages.
The absolute control messages are implemented nevertheless for future use.
The script assumes therefor at least the following parameters to be set:
SCR_ENABLE = 1
SERVO_PITCH_TYPE = 2 # ContinuousRotation type servo
SERVO_YAW_TYPE = 2 # ContinuousRotation type servo
SERIALx_PROTOCOL = 28 # serial port used by luascript
Additionally the PITCH2SRV and YAW2SRV tuning needs to be done as described by the antennatracker description.
Also keep attention to the PITCH_MIN, PITCH_MAX and YAW_RANGE parameters to fit your Pelco-D hardware!
petrosilius