Docu for MultiRotorMania board(s)

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This page provides documentation for the STorM32-BGC board sold by Multi Rotor Mania.

Dos and Don'ts

Please read the tutorial's Dos and Don'ts.

The board is shipped without firmware, it hence needs first to be flashed (see here).

Also, the pins on the connector I2C#2 on the bottom side are reversed as compared to those of connector I2C. Pay attention to that when connecting a second IMU to the I2C#2 port. Fortunately, it is relatively easy to swap the pins on the connectors of the supplied IMU cables.

Shop Link

http://multirotormania.com/controllers/42-stormbgc-32-bit-3-axis-controller-wimu.html

Board Configuration

  • board version: v1.1
  • board color: blue
  • motor drivers in DFN packages: yes
  • on-board MPU: yes
  • on-board bluetooth module: no
  • I2C plug type: picoblade (1.25mm JST)
  • I2C#2 plug type: picoblade (1.25mm JST)
  • pin headers: no

Included accessories:

  • MPU module
  • cable with connectors for MPU module

Points to note:

  • the board comes without firmware
  • the pins on connector I2C#2 are reversed as with respect to connector I2C
  • on some boards the diode required for runing a bluetooth module is not populated (see here)

Specifications

  • supply voltage: 6 - 18 V or 2 - 4S
  • motor current: max. 1.5 A per motor
    Comment: This is not yet fully exploited, motors with resistances of 12 Ohm or larger have been tested to be well handled at 4S (see here, here), motors with 10 Ohm may be handled with care (see here and here).
  • board dimensions: 50 mm x 50 mm, 45 mm bolt to bolt, holes Ø3 mm

Pins and Connectors

Flashing Firmware

Follow the instructions for v1.1 boards in the How to flash firmware manual.

On-board Bluetooth

The witespy board can be equipped with a HC06 bluetooth module on the bottom side of the board. However, a diode, which is needed for the on-board bluetooth module to work, is not populated. Its location is shown in the photo below. In principle any diode which fits on the pads can be used, but preferably a Shottky diode is choosen. The "original" type is a 1PS76SB40. A possibly simpler solution is to just short circuit the two pads by e.g. soldering a piece of wire across them. However, the communication via the UART port wouldn't work then anymore.

Comment: When you don't need or use the UART port, you can simply jumper across the diode pads permanently with a piece of wire.

For further info on the HC06 bluetooth module, and its installation and configuration, see Bluetooth Module HC06.

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