1. In Device list VC, to display only the Ho Mo devices if they are available around. Otherwise the VC is nothing to display. Drop-down to refresh device list.
2. In Settings VC, nothing to display, press the info button(?) on the top-right, then entry Help VC to display version info.
Function:
Mobile phone sends some brightness data to device side.
Device output some pwm signal to peripheral depending on the brightness data.