optional_channels = tuple(
{'id': 'd{}'.format(i), 'name': 'D{}'.format(i), 'desc': 'Data line {}'.format(i)}
for i in range(MAX_CHANNELS)
optional_channels = tuple(
{'id': 'd{}'.format(i), 'name': 'D{}'.format(i), 'desc': 'Data line {}'.format(i)}
for i in range(MAX_CHANNELS)