LGTV UART component for ESPHome ESPHome custom component for DIY LGTV controller using RS232 interface Hardware Wemos D1 MINI MAX3232 Wemos D1 MINI : MAX3232 3V3: VCC G: GND D3: TXD D4: RXD Command reference https://www.lg.com/us/business/download/resources/BT00001837/UV340C-U_Install_Manual_170825.pdf