[ref] Try 1 mutex/cond
[fix] Conditionnal waits should be placed on HALResources
[enh] Larger delay when communication error
Merge branch 'driver2' of github.com:urlab/hal into driver2-1mutex
[enh] Slightly increase delays on Arduino (less noise and desync)
Merge branch 'driver2-1mutex' of github.com:urlab/hal into driver2-1mutex