Notice This item changes into New GSF405 BMI Version comes with BMI270 Gyro Aug 12th 2022 Description JHEMCU GSF405A BMI is a 1 2S F4 AIO that integrates a 4in1 brushless ESC and an 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 there is a WS2812 LED light on the board and the WS2812 interface is reserved Built in black box 8MB and barometer with buzzer interface and camera interface 5V power supply camera interface is reserved on the board Specification Manual Flight controller CPU STM32F405Gyroscope Accelerometer BMI270OSD AT7456EBarometer BMP280Black box 8MBIIC supportBEC 5VUART UART1 ELRS UART2 external RC UART3 UART4 UART6USB micro usbSize 25 5x25 5mm M2Receiver ELRS CRSF TBS CRSF SBUS IBUS DSM2 DSMXSupport programmable LEDs such as WS2812Support buzzerBuilt in voltage current sensorFirmware Betaflight 4 3 0 STM32F405 HEX JHEF405PRO Weight 3 3gELRS Frequency 2 4GHZWorking Agreement CRSF Betaflight Firmware JHEMCU EP24S 2400 RX 2 2 0 binELRS receiver indicator status Double flash binding modeSlow flashing no transmit signal receivedSteady on the transmit signal is receivedFrequency pairing steps 1 Connect the USB to power the flight controller After plugging in the USB for the first time disconnect the USB as soon as you see the LED light on the receiver goes out Repe