NullChip class NullChip[source] Bases: object __init__() Methods __init__() set_pwm(channel, on, off) Sets the cycle. Attributes error error: str = 'Error connecting to the chip ' set_pwm(channel: int, on: int, off: int) → None[source] Sets the cycle. Parameters: channel (int) – The PWM channel. on (int) – The on time in ticks. off (int) – The off time in ticks.