14 - UART3 - Inverted Smart Port,
17 - Soft Serial 1 - Smart Port
18 - Soft Serial 2 - ESC Telemetry
22 * Integrated Voltage Regulator
24 * Include Load Switch (VTX Real Pit Mode)
25 - -30V , -30A (VTX or LED On / Off)
26 * Include Low Pass LC filter
31 ![Elin F405 Pinout](images/ElinF405_pinout.jpg)