Mateksys F405-SE/WSE

../_images/matekf405-se.jpg ../_images/matekf405-wse.jpg

the above images and some content courtesy of mateksys.com

Note

Due to flash memory limitations, this board does not include all ArduPilot features. See Firmware Limitations for details.

Specifications

  • Processor
    • STM32F405RGT6 ARM (168MHz)
  • Sensors
    • InvenSense MPU6000 IMU (accel, gyro)
    • DPS310 Barometer
    • Voltage & 184A current sensor
  • Power
    • 6V ~ 36V DC input power
    • 5V, 2A BEC for FC & Peripherals (GPS/Compass/etc.)
    • BEC Vx 5A for servos, 5V/ 6V option (WSE 0nly)
    • BEC 8V 1.5A for VTX and camera (WSE 0nly)
  • Interfaces
    • VCP & 6x UARTS
    • 10x PWM outputs, (LED output used as PWM10)
    • 1x RC input PWM/PPM, SBUS
    • 2x I2C port for external compass and airspeed sensor
    • USB port
    • Built-in OSD
    • 3x ADC (Vbat, Current, RSSI)
    • Micro SD slot
  • Size and Dimensions
    • SE:
      • 46mm x 36mm (30.5mm spaced square mounting holes)
      • 10g
    • WSE:
      • 44mm x 29mm x 10mm (25mm x25mm mounting, 2mm holes)
      • 20g with bottom plate and remoter USB/buzzer board

These boards use the MatekF405-Wing firmware here.

See mateksys.com for SE detailed specifications and wiring diagrams and WSE detailed specifications and wiring diagrams

Default UART order

  • SERIAL0 = console = USB
  • SERIAL1 = Telemetry1 = USART1
  • SERIAL2 = empty
  • SERIAL3 = GPS1 = USART3
  • SERIAL4 = GPS2 = UART4
  • SERIAL5 = USER = UART5
  • SERIAL6 = USER = USART6 (RX only; for ESC telemetry, use SERIAL6_PROTOCOL=16)
  • SERIAL7 = USER = USART2 (only if BRD_ALT_CONFIG =1)

Serial protocols can be adjusted to personal preferences.

Dshot capability

All motor/servo outputs are Dshot and PWM capable. However, mixing Dshot and normal PWM operation for outputs is restricted into groups, ie. enabling Dshot for an output in a group requires that ALL outputs in that group be configured and used as Dshot, rather than PWM outputs. The output groups that must be the same (PWM rate or Dshot, when configured as a normal servo/motor output) are: 1/2, 3/4, 5/6, 7/8, 9 , and 10.

Outputs

The first 8 servo/motor outputs are marked on the board: M1,M2,S3-S8 . S9 is a solder pad on the board, and S10 is connected to the pin marked LED in ArduPilot’s definition. Using S10 allows the easy grouping for odd numbers of motors with a common DShot or PWM frequency without sacrificing the use of an output for servo use due to rate issues (see above Dshot discussion).

RC Input

The SBUS pin, is passed by an inverter to R2 (UART2 RX), which by default is mapped to a timer input instead of the UART, and can be used for all ArduPilot supported receiver protocols, except CRSF which requires a true UART connection. However, bi-directional protocols which include telemetry, such as SRXL2 and FPort, when connected in this manner, will only provide RC without telemetry.

To allow CRSF and embedded telemetry available in Fport, CRSF, and SRXL2 receivers, the R2 pin can also be configured to be used as true UART2 RX pin for use with bi-directional systems by setting the BRD_ALT_CONFIG to “1” so it becomes the SERIAL7 port’s RX input pin.

With this option, SERIAL7_PROTOCOL must be set to “23”, and:

  • PPM is not supported.
  • DSM/SRXL connects to the R2 pin, but SBUS would still be connected to SBUS.
  • FPort requires connection to T2 and R2 via a bi-directional inverter. See FPort Receivers .
  • CRSF also requires a T2 connection, in addition to R2, and automatically provides telemetry.
  • SRXL2 requires a connection to T2 and automatically provides telemetry. Set SERIAL6_OPTIONS to “4”.

Any UART can be used for RC system connections in ArduPilot also, and is compatible with all protocols except PPM (SBUS requires external inversion on other UARTs). See Radio Control Systems for details.

Battery Monitor Configuration

These settings are set as defaults when the firmware is loaded, except BATT_AMP_PERVLT which needs to be changed from 31.7 to 55.9 . However, if they are ever lost, you can manually set the parameters:

Enable Battery monitor.

BATT_MONITOR =4

Then reboot.

BATT_VOLT_PIN 10

BATT_CURR_PIN 11

BATT_VOLT_MULT 11.0

BATT_AMP_PERVLT 55.9

Note

this autopilot uses a high precision current sensor which is sensitive to ESC switching noise. Be sure to use the bypass capacitor provided. In some cases, the ESCs themselves will need additional 200-330uF low ESR capacitors on their power inputs, if they do not incorporate them already. See Matek FAQs for more information.

Where to Buy

Connecting a GPS/Compass module

This board does not include a GPS or compass so an external GPS/compass should be connected for autonomous modes to function. Compass is not required for normal Plane mode operation, but is for typical Copter, QuadPlane, and Rover operation.

Note

A battery must be plugged in for power to be provided to the 5V pins supplying the GPS/compass modules.

Firmware

Firmware for this board can be found here in sub-folders labeled “MatekF405-Wing”.