code: def set_nightlight(self, state):
      
      packet = bytearray(16)
      packet[0] = 2
      if self.check_power():
        packet[4] = 3 if state else 1
      else:
        packet[4] = 2 if state else 0
      self.send_packet(0x6a, packet)
docs: Sets the night light state of the smart plug