3 ![BeeRotor F4 front](https://raw.githubusercontent.com/wiki/betaflight/betaflight/images/boards/beerotorf4/beerotorf4_front.jpg)
5 ![BeeRotor F4 back](https://raw.githubusercontent.com/wiki/betaflight/betaflight/images/boards/beerotorf4/beerotorf4_back.jpg)
10 * Integrated Accelerometer/Gyro MPU6050 via SPI bus
13 * 3 UART ports (UART1, UART2, UART3)
15 * UART2 and UART3 are equipped with inverter
16 * SD Card slot for logging
21 ## Currently **NOT** supported
24 * IR transmitter output
28 SerialRX, PPM and MSP receivers are supported.
30 SerialRX and PPM receivers should be connected to dedicated _PPM SBUS_ pin on the _RX_ connector. MSP receivers should be connected to one of UARTs configured as MSP.
34 This board uses STM32 VCP and _not_ utilizes UART when USB is connected. STM32 VCP drivers might be required!
36 Flashing requires DFU mode and STM32 DFU drivers. Use [Zadig](http://zadig.akeo.ie) tool to install WinUSB driver on Windows.
40 5V piezo buzzer should be connected directly to dedicated pins _BUZ +_ and _BUZ -_. No additional hardware is required.
44 * Use the dedicated _RSSI_ pin on the _RX_ connector.
45 * 3.3V tolerant, do not supply 5V
49 * Use the dedicated _SI_ pin on the _PDB_ connector, or the _SI_ pad on the board.
50 * 3.3V tolerant, do not supply 5V
54 * Use the dedicated _SI_ pin on the _PDB_ connector, or the _SV_ pad on the board.
55 * 3.3V tolerant, do not supply 5V
56 * _SV_ pin on the _PDB_ connector does not have a voltage divider. It requires a voltage divider on the PDB, or the board will be destroyed! (The _SV_ pad on the board has a voltage divider, use this if your board doesn't.)
60 * Use the dedicated _LED_ pin on the LED / buzzer connector.