The dynamixel is now working fine !
the issue was :
-12V 2A supply better than 1A to make sure you cover the current consumption of the dynamixel servo motor (900mA), the Dynamixel L0 base board and Driver Shield and the Luos Gate (communication to PC)
- also the sequencing should be : first power the 12V 2A (through Luos jack board) to make sure the Dynamixel Servo is powered, then only connect the USB COM to the Luos and run the Python Script to turn the Dynamixel of a certain angle.
Luos_Gate_and_Dynamixel_control.ipynb
Luos_Gate_EstablishConnectionWithLaptop.py