Product overview
The RadioLink SU04 combines ultrasonic transmission and reception in a single-detector module measuring 20 × 22 × 19 mm and weighing 8g. An integrated 32-bit processor works with hardware and software dual filters to provide a 30ms response. Its detection specifications include 0.4cm accuracy, a 60° beam angle and zero fade area. Intended applications include floor and ceiling collision avoidance during beginner training, following barriers during rescue work, and downward altitude holding over steep slopes or horizontal obstacle avoidance in agricultural operations.
Integration uses automatically identified I2C or UART with MAVLink, with compatibility covering RadioLink CrossRace, CrossFlight, PIXHAWK, Mini Pix and TURBO Pix controllers, plus open-source PIXHAWK. With CrossFlight, either listed PIXHAWK implementation, Mini Pix or TURBO Pix, obstacle avoidance is limited to a maximum of two directions, alongside altitude holding. The supplied configuration is a sensor accessory package: one SU04, one I2C wire each for Mini Pix and PIXHAWK, one TELEM1&2 wire each for those controllers, and one packing bag.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity and type | RadioLink SU04 ultrasonic sensor |
| Applicable vehicle types | Helicopter, multirotor, airplane, car and boat |
| Processor | Integrated 32-bit processor |
| Filtering architecture | Hardware and software dual filters |
| Response time | 30ms |
| Detection accuracy | 0.4cm |
| Fade area | Zero fade area |
| Beam angle | 60° |
| Transceiver architecture | Ultrasonic transceiver with a single detector |
| Dimensions | 20 × 22 × 19 mm (0.79 × 0.87 × 0.75 inches) |
| Weight | 8g (0.28oz) |
| Compatible flight controllers | RadioLink CrossRace, CrossFlight, PIXHAWK, Mini Pix and TURBO Pix; open-source PIXHAWK |
| Interfaces and protocol detection | Automatic identification of I2C and UART (MAVLink protocol) |
| Obstacle avoidance and altitude holding | Obstacle avoidance in a maximum of 2 directions; altitude holdingConnected to CrossFlight, RadioLink or open-source PIXHAWK, Mini Pix, or TURBO Pix. |
| Rescue application | Barrier detection and flight along barriers for rescue applicationsSU04 equipped on a drone. |
| Training application | Floor and ceiling collision avoidance during throttle operation, intended to protect trainees and training equipmentSU04 equipped during beginner drone training. |
| Agricultural application | Downward altitude holding over steep slopes or horizontal obstacle avoidance during agricultural fertilizingSU04 used on agricultural drones. |
| Included sensor | 1 × SU04Supplied package. |
| Included Mini Pix I2C wire | 1 × Mini Pix I2C wireSupplied package. |
| Included PIXHAWK I2C wire | 1 × PIXHAWK I2C wireSupplied package. |
| Included Mini Pix telemetry wire | 1 × Mini Pix TELEM1&2 wireSupplied package. |
| Included PIXHAWK telemetry wire | 1 × PIXHAWK TELEM1&2 wireSupplied package. |
| Included packaging | 1 × packing bagSupplied package. |
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