Product overview
The RadioLink SUI04 is an ultrasonic sensor accessory for multirotors, supporting obstacle feedback and real-time height detection in applications such as agricultural drone operation. Its single-detector transceiver integrates a 32-bit processor with hardware and software filtering. The module measures 20 × 22 × 19 mm (0.79 × 0.87 × 0.75 inches) and weighs 8g (0.28oz). Its 30ms response, 0.4cm detection accuracy, 60° beam angle and zero fade area apply under closed-environment testing in favorable conditions with an unobstructed wireless signal; results vary with environment, usage and firmware.
Integration with RadioLink APM flight controllers through an I2C expansion board supports synchronous obstacle avoidance backward, forward, left, right, upward and downward. Overall obstacle avoidance requires Copter V3.5.7 firmware, including on PIXHAWK and Mini PIX, and remains subject to the same favorable closed-environment conditions and variation with environment, usage and firmware. The supplied sensor package contains one SUI04, one PIXHAWK I2C wire, one connection wire for CrossRace, CrossFlight, Mini Pix or an I2C Transfer Board, and one packing bag.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity and purpose | RadioLink SUI04 ultrasonic obstacle-avoidance sensor for multirotors. |
| Processor | Integrated 32-bit processor. |
| Filtering architecture | Hardware and software dual filters. |
| Response time | 30ms.Closed environment, favorable conditions and an unobstructed wireless signal; actual results may vary with environment, usage and firmware version. |
| Detection accuracy | 0.4cm.Closed environment, favorable conditions and an unobstructed wireless signal; actual results may vary with environment, usage and firmware version. |
| Beam angle | 60°.Closed environment, favorable conditions and an unobstructed wireless signal; actual results may vary with environment, usage and firmware version. |
| Fade area | Zero fade area.Closed environment, favorable conditions and an unobstructed wireless signal; actual results may vary with environment, usage and firmware version. |
| Detector architecture | Single-detector transceiver. |
| Dimensions | 20 × 22 × 19 mm (0.79 × 0.87 × 0.75 inches). |
| Weight | 8g (0.28oz). |
| Flight-controller compatibility | Compatible with all RadioLink APM series flight controllers.Overall obstacle avoidance requires the flight-controller firmware upgrade to Copter V3.5.7. |
| Synchronous obstacle avoidance | Six directions synchronously.Connection through an I2C expansion board to RadioLink APM flight controllers, with Copter V3.5.7 required for overall obstacle avoidance. Closed environment, favorable conditions and an unobstructed wireless signal; actual results may vary with environment, usage and firmware version. |
| Obstacle-avoidance directions | Backward, forward, left, right, upward and downward.Connection through an I2C expansion board to RadioLink APM flight controllers, with Copter V3.5.7 required for overall obstacle avoidance. Closed environment, favorable conditions and an unobstructed wireless signal; actual results may vary with environment, usage and firmware version. |
| Required firmware | Upgrade the flight-controller firmware to Copter V3.5.7.Before using overall obstacle avoidance with PIXHAWK or Mini PIX. |
| Included sensor | One SUI04.Supplied package. |
| Included PIXHAWK cable | One PIXHAWK I2C wire.Supplied package. |
| Included alternative connection cable | One wire for CrossRace and CrossFlight, Mini Pix (I2C), or an I2C Transfer Board.Supplied package. |
| Included packaging | One packing bag.Supplied package. |
| Performance conditions | Actual results may vary with environment, usage and firmware version.Closed environment, favorable conditions and an unobstructed wireless signal. |
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