There is currently a potential failsafe bug in the betaflight firmware that will be fixed with the next betaflight 3.4 release.  If you got failsafe issue, pls use D8 mode and Frsky_D protocol with multishot or Dshot command disabled. or use the BF_3.4.0 hexx file from the matek website.  Github issue link

The Matek F411-One is the latest all in one flight controller to come out of the Matek factory.  Featuring the F411 MCU combined with an Frsky_X receiver and a integrated PDB,  The key feature here is that the Frsky-X receiver uses the latest SPI-RX protocol which significantly reduced the load on your MCU while being faster.  This Frsky_X SPI protocol also supports Frsky telemetry and RSSI in addition to the R/C stick commands which ultimately gives you more UART ports to connect other gear to this flight controller.  As with many other betaflight flight controllers, the F411-One includes a betaflight OSD, MPU6000 gyro and a 184A PDB with integrated current sensor.

Included with the kit are some vibration isolating M3 silicone grommets along with a low ESR capacitor to filter any noise.  To turn the F411-One into a fully functional FPV stack, it is suggested that you add the VTX-HV ontop.

The FRSKY_X receiver only compatible international firmware (either D8/D16 mode) right now. It is not currently compatible with D16 EU LBT firmware but will work with D8 mode if you have an EU LBT radio and upgrade to the latest version of OPENTX which enabless D8 mode. Lua scripts are supported BUT work with D16 of international firmware.

Key Features

• Integrated FRsky_X receiver running SPI_RX
• 3x LEDs for FC STATUS (Blue) , RX (Green) and 3.3V indicator(Red)
• 4x PWM / DShot outputs
• 2x UARTs
• 1x Group of G/S1/S2/S3/S4 pads for 4in1 ESC Signal/GND
• 4x pairs of corner pads for ESC Power connections
• 1x Side-press button for BOOT(DFU) mode
• 1x Side-press button for RX bind
• 36x46mm PCB with 30.5mm mounting holes
• Weight of just 10g

Connection Guide

Flight Controller Specifications

• MCU: 100MHz STM32F411CEU6
• IMU: MPU6000 gyro/accelerometer (SPI)
• OSD: BetaFlight OSD w/ AT7456E chip
• SPI RX: module 2500-2431, Frsky_X or Frsky_D protocol
• VCP, UART1, UART2
• WS2812 Led Strip : Yes
• Beeper : Yes
• PPM: RX2 pad
• Blackbox: No
• SBUS input: No
• I2C1 SDA & SCL: No

PDB Specifications

• Input: 6~30V (3~6S LiPo) w/TVS protection
• PDB: 4x30A (Max.4x46A)
• BEC: 5V 2A cont. (Max.3A)
• LDO 3.3V: Max.300mA
• Current Sensor 184A (Scale 179)
• Battery Voltage Sensor: 1:10 (Scale 110)

Included

• w/ 1x Rubycon ZLH 35V/470uF (Low ESR)
• w/ 6x silicon grommets M4 to M3
• w/ 2x IPEX- 2.4G antenna 15cm

F411-One Pinout