The SpeedyBee F4 3-6S 20×20 Stack/Combo (F405 FC / 35A 8bit 4in1 ESC)! Experience feature-rich performance and an unbeatable price for a 20×20 stack. Utilizing an upgraded F405 flight controller chip with better performance than the F411, it features a built-in Bluetooth chip for seamless wireless Betaflight tuning. The board comes with a 4-level battery voltage display, built-in barometer, and supports connectivity to all DJI Air Units. It offers 4 available UART ports, and a dual BEC setup with 5V 2A and 9V 3A outputs. This ESC provides four synchronized outputs with a continuous current of 35A, delivering strong power to drive all 2-4 inch and lightweight 5-inch quadcopters via 4-6S battery. Equipped with a TVS transient suppression diode onboard, it better absorbs surge voltage, providing enhanced protection for the ESC.

Check out all our20x20 stacks,and ourSpeedyBee products!

Features

• User Manual
• DJI compatible
• Feature-rich
• Budget-friendly price point
• Compatible with M2 and M3

Specifications

• Product Name: SpeedyBee F405 Mini BLS 35A 20×20 Stack
  
• Flight Controller: SpeedyBee F405 Min
  
• ESC: SpeedyBee BLS 35A Mini V2 4-in-1 ESC
  
• Bluetooth: Supported. Used to connect with the SpeedyBee App for flight
• controller and ESC parameter configuration. Please make sure the MSP switch on
• UART 4 is turned on and set to a baud rate of 115200, otherwise Bluetooth
• functionality will not be available.
  
• WiFi: NOT Supported
  
• Wireless FC Firmware Flashing: NOT Supported
  
• Wireless: Blackbox Download & Analysis NOT Supported
  
• Power Input: 3-6S LiPo
  
• Mounting: 20 x 20mm 3.5mm hole size Compatible with M2 and M3
• screws/Silicone grommets
  
• Dimension: 32mm(L) x 35mm(W) x 14.2mm(H)
  
• Weight: 13.5g

SpeedyBee F405 V3 30×30 Flight Controller

• MCU: STM32F405
  
• IMU(Gyro): ICM42688P
  USB Port Type: Type-C
  
• Barometer: Built-in
  
• OSD Chip: AT7456E chip
  
• BLE Bluetooth: Supported. Used to connect with the SpeedyBee App for flightcontroller and ESC parameter configuration. Please make sure the MSP switch on UART 4 is turned on and set to a baud rate of 115200, otherwise Bluetoothfunctionality will not be available.
• Wireless FC Firmware Flashing: NOT Supported. Please connect to the Betaflightconfigurator on the PC to do FC firmeare update
• Wireless Blackbox Download & Analysis: NOT Supported. Please connect to theBetaflight configurator on the PC to do blackbox analysis.
• WIFI: Not supported
  
• DJI Air Unit Connection Way: Direct soldering
  
• DJI Air Unit Compatibility: Compatible with all DJI Air Units: DJI O3/RunCamLink/Caddx Vista/DJI Air Unit V1. Please use the solder pads < 9V, G, T1, R1, G, SUBS(R2) > on the front right corner of the flight controller to make a pin-to-pin connection with the solder pads on the DJI Air Unit. UART1(T1, R1) is used for OSD and SUBS(R2) is used for DJI Air Units internal SBUS receiver signal input.
• Blackbox: 8MB Onboard Flash
  
• BetaFlight Camera Control Pad: Yes(CC pad on the front side)
  
• Current Sensor Input: Supported. For SpeedyBee BLS 35A V2 ESC, please setScale=250 and Offset=-500.
• Power Input: 3-6S LiPo. The flight controller is powered through the G, V wires ofthe 8pin harness or G, V pads from the bottom side of the flight controller.
• 5V Output: 4 groups of 5V output, three +5V pads and 1 BZ+ pad( used for
• Buzzer) on front side. The total current load is 2A.
  
• 9V Output: 1 group of 9V output, one +9V pad on front side. The total currentload is 3A.
• 3.3V Output: Supported. Soldering pad named 3V3 on the front top of the flightcontroller. Designed for 3.3V input receivers. Up to 500mA current load.
• 4.5V Output: Supported. Designed for radio receiver and GPS module even whenthe FC is powered through the USB port. Up to 1A current load.
• ESC Signal: M1 – M4 wires or soldering pads on bottom side.
  
• UART: 6 sets(UART1, UART2, UART3, UART4(Dedicated for Bluetooth connection)),UART5(Dedicated for ESC telemetry),UART6
• ESC Telemetry: UART R5(UART5)
  
• I2C: Supported. DA & CL pads on front side. Used for magnetometer, sonar, etc
  
• Traditional Betaflight LED Pad: Supported. 5V, G and LED pads on bottom of thefront side. Used for WS2812 LEDs controlled by the Betaflight firmware.
• Buzzer: BZ+ and BZ- pad used for 5V Buzzer
  
• BOOT Button: Supported. Press and hold BOOT button and power the FC on at the
• same time will force the FC to enter DFU mode, this is for firmware flashing whenthe FC gets bricked.
• RSSI Input: Not Supported
  
• Smart Port / F.Port: Not Supported
  
• Supported Flight Controller Firmware BetaFlight(Default), INAV
  
• Firmware Target Name: SPEEDYBEEF405MINI
  
• Mounting: 20 x 20mm 3.5mm hole diameter, Compatible with M2 and M3
• screws/Silicone grommets.
  
• Dimension: 30(L) x 32(W) x 7.8(H)mm
  
• Weight 9.6g

SpeedyBee 35A BLHeli_S Mini V2 4-in-1 ESC

• Firmware: BLHeli_S J-H-40
• Continuous Current: 35A x 4
• Burst Current: 45A(5seconds)
• ESC Protocol: DSHOT300/600
• Power Input: 3-6S LiPo
• Power Output: VBAT(Battery voltage, used to power the flight controller)
• Current Sensor: Support (Scale=250 Offset=-500)
• Mounting: 20 x 20mm 3.5mm hole size, compatible with M2 and M3 screws/Silicone grommets.
• Dimension: 35 x 35 x 5.5mm
• Weight: 7.2g

Includes

• 1x SpeedyBee F4 3-6S 20×20 Stack/Combo (F405 FC / 35A 8bit 4in1 ESC)

Wiring Diagram