This I²C brushless controller is programmed to be used in configurations like the MikroKopter Hexa or the OktoKopter.
It can be set to address 5-8.
Brushless motor controller with fast response for the MikroKopter.
This it is a SMD-preassembled BL-Ctrl-kit, only one capacitor has still to be soldered.
The board is tested and programmed (including bootloader)

• Integrated current measurementfor measuring the actual current and the used capacity
• PCB: 4-layers (increased current-measuring shunt)
• Supply: 10-20V (3s + 4s)
• Automatic current limitation
• By high-performance MOSFETs 12A and 25A peak period are possible.
• Two LEDs (e.g., OK and Error)
• Addressing the controller by jumper (motors 1 to 4)
• Various interfaces (I2C, PPM, serial)
• Drill: 3mm
• Dimensions (W x H): approx 44mm x 21mm
• Weight (approx.): 5.2gr

• 1 SMD-preassembled board
• 1 Electrolytic capacitor (low ESR) to be soldered.

• Article in the Wiki -  (German)

• Ref: Brushless controller bl-ctrl v1.2 - extra sw- I2C