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The Radiolink I2C expansion board is a compact but powerful accessory that expands the connectivity of your flight controller. It is compatible with popular controllers such as CrossRace, CrossFlight, Pixhawk, Mini Pix and TURBO Pix.
It splits a single I2C port into two independent I2C outputs so that you can connect more peripherals. You can add modules such as the SU04 ultrasonic sensor for precise altitude holding, or an LED module to improve visibility and orientation during flight.
The board also has dedicated input and GPS ports for reliable signal transmission and stable connections without interference.
Expanded connectivity: splits one I2C port into two so several modules can be connected.
Altitude holding support: works with SU04 ultrasonic sensors.
Improved visibility: compatible with LED modules.
Dedicated ports: input and GPS ports for stable, interference-free connections.
Wide compatibility: Mini Pix, Pixhawk, CrossFlight, TURBO Pix and open-source Pixhawk.
Easy integration: compact design with cables included.
I2C is a two-wire bus that lets a flight controller talk to several small devices such as compasses, sensors and LED modules. Each device has its own address, but the flight controller usually has only one or two I2C ports, so an expansion board that fans out the port makes it possible to attach more devices.
When you add several devices to one bus, keep the wires short and make sure that no two devices share the same address. Long or noisy wires can cause errors on the bus, which the flight controller may report as a sensor failure, so tidy routing matters.
After connecting, check in the ground-station software that every device is detected, and test the ultrasonic sensor or LED module on the bench before flight.
Adding an SU04 ultrasonic sensor for altitude holding
Adding LED modules for orientation
Sharing one I2C port between several peripherals
Radiolink CrossFlight, Mini Pix and TURBO Pix builds
Open-source Pixhawk builds
The specifications list four ports (one input port, two I2C ports and one GPS serial port) and compatibility with Radiolink CrossFlight, Mini Pix, TURBO Pix, Pixhawk and open-source Pixhawk. It works with the Radiolink SU04/SUI04 ultrasonic obstacle-avoidance sensors.
The package includes a Mini PIX cable and a PIXHAWK cable.
Ports: 4 (1 input, 2 I2C, 1 GPS serial)
Compatible controllers: Radiolink CrossFlight, Mini Pix, TURBO Pix, Pixhawk, open-source Pixhawk
Compatible module: Radiolink SU04/SUI04 ultrasonic sensor
1 x Radiolink I2C expansion transfer board
1 x Mini PIX cable
1 x PIXHAWK cable
Radiolink and Pixhawk users who need more I2C ports for sensors and LED modules.
It splits one I2C port into two.
Four: one input, two I2C and one GPS serial.
CrossFlight, Mini Pix, TURBO Pix, Pixhawk and open-source Pixhawk.
The Radiolink SU04/SUI04 ultrasonic sensor.
Yes, a Mini PIX cable and a PIXHAWK cable.
Adding more peripherals to a flight controller.
| Brand | Radiolink |
|---|---|
| Ports | 1 input, 2 I2C, 1 GPS serial |
| Software Compatibility | CrossFlight, Mini Pix, TURBO Pix, PIXHAWK |
| Selling unit | PCS |
