JHEMCU GSF405A is a 1-2S F4 AIO, which also integrates four-in-one brushless ESC and ELRS 2.4G receiver. It has 5 serial ports (UART1, UART2, UART3, UART4, UART6), one I2C port, and one SBUS interface. (The serial port used by SBUS is RX2), the built-in ELRS receiver is the UART1 port, onboard a WS2812 LED light, and a WS2812 interface is reserved. Built-in black box 8MB and barometer, buzzer interface, camera interface. A 5V power supply camera interface is reserved on the board.                              Flight control parameters:          CPU: STM32F405          Gyroscope/Accelerometer: MPU6000          OSD: AT7456E          Barometer: BMP280          Black box: 8MB          IIC: Support          BEC: 5V          UART: UART1 (ELRS), UART2 (external RC), UART3, UART4, UART6          USB: micro usb          Size: 25.5*25.5MM M2          Receiver: ELRS (CRSF), TBS (CRSF), SBUS, IBUS, DSM2, DS MX          Support programmable LED such as WS2812          Support buzzer          Built-in voltage and current sensors          Weight: 3.3 grams                    ELRS RX parameters:          Frequency: 2.4GHZ          Working Agreement: CRSF (Betaflight)          Firmware: DIY_2400_RX_ESP8285_SX1280          ELRS receiver indicator status:          Double flash: code matching mode          Slow flashing: No transmission signal received          Steady on: Received transmit signal                    Linking steps:          1. Connect USB to power the flight controller. After inserting the USB for the first time, disconnect the USB as soon as the LED on the receiver turns off. Repeat the operation twice, when the USB is inserted for the third time, the LED will start to flash double, and the receiver will enter the code matching mode.                              ESC parameters:          Support PWM, Oneshot125, Oneshot42, Multishot, Dshot150, Dshot300, Dshot600          Input voltage: 1S-2S Lipo          Continuous current: 5A          Firmware: BLHELI_S S_H_50_REV16_7.