Synchronous mode for DxlController

[jjehl]

I noticed a long time of response for motors when controling them with monitor and LightDxlController (in syncloop.py). The explanation is that if the synchronous variable is set to True for the DxlController, there is something wrong.

DxlController(io, motors, 10., True, 'get', 'present_voltage')

I guess the update is different between True and False. Is there someone who can explain what's the differences between the True or False for the synchronous parameter in the DxlController Class ? @pierre-rouanet if you are around ?