uncomment mutex locking again (working)
uncomment mutex locking again (working)

glibersat/firmware,BrewPi/firmware,BrewPi/firmware,BrewPi/firmware,BrewPi/firmware,glibersat/firmware,glibersat/firmware,BrewPi/firmware,BrewPi/firmware,glibersat/firmware,glibersat/firmware,BrewPi/firmware,glibersat/firmware,BrewPi/firmware,glibersat/firmware