If connect the I2C expansion board directly to the I2C/GPS port of Flight Controller, only ultrasonic sensors SUI04 can be affixed as the GPS port is occupied. If GPS and ultrasonic sensors need to be connected as the same time, a transfer board is essential to connect with the GPS/I2C port of flight controller first, then connect expansion board to the transfer board.
Input Port
I2C Ports
* I2C Expansion Board：I2C port of flight controller can be extended to maximum six.
I2C Expansion Board VS I2C Transfer Board
I2C Transfer Board
Name
Picture
Port Quantity
I2C Expansion Board
Port
Function
Compatible Flight Controller
Compatible Module
Remark
7P
1 Input Port and 6 I2C Ports
Extention of I2C Port Only
Obstacle Avoidance of Six Synchronous Direction (Overall)
Compatible with RadioLink Mini Pix/TURBO PiX/PIXHAWK and Open Sourced PIXHAWK
Compatible with RadioLink Ultrasonic Sensor of Obstacle Avoidance SU04/SUI04
When GPS and ultrasonic sensors need to be connected at the same time, a transfer board is essential to connect with the GPS/I2C port of flight controller first, then expansion board to the transfer board.
Accessory, Purchased Individually
4P
1 Input Port, 2 I2C Ports and 1 GPS Serial Port
Extention of I2C Port and GPS Serial Port
Obstacle Avoidance of Arbitraty Two Synchronous Directions
Two I2C ports can be used to connect with corresponding I2C modules such as one ultrasonic sensor SU04 to achieve altitude holding and an LED module.
Mini Pix/TURBO PiX Standard Pack
Work with SUI04, Overall Synchronous Obstacle Avoidance
With maximum 6 ultrasonic sensors SUI04 connected to the expansion board, aircraft can avoid obstacles from 5 directions (forward/backward/left/right/upward) and altitude hold downward.
