Product overview
The RadioLink SU04 is an ultrasonic sensing accessory for obstacle avoidance and altitude holding on a connected flight controller. Its applications include beginner training, where sensing addresses floor or ceiling collisions during throttle operation, and agricultural flying, where downward altitude holding over steep slopes or horizontal obstacle avoidance can support field work. The supported platform types extend beyond multirotors to helicopters, airplanes, cars and boats. Obstacle avoidance is specified for a maximum of two directions when connected to the listed controllers.
The module combines an ultrasonic transmitter and receiver in a single-detector architecture, with an integrated 32-bit processor and hardware and software filtering. Its 20 × 22 × 19 mm body weighs 8g, providing a compact integration footprint. Detection specifications include 0.4cm accuracy, a 60° beam angle, zero fade area and a 30ms response. Connections use automatically identified I2C or UART with MAVLink. The supplied configuration contains one sensor, four connection wires for Mini Pix and PIXHAWK interfaces, and a packing bag.
Specifications
| Specification | Value & conditions |
|---|---|
| Product | RadioLink SU04 ultrasonic sensor |
| Platform types | Helicopter, multirotor, airplane, car and boat |
| Processor and filtering | Integrated 32-bit processor with hardware and software dual filters |
| Response time | 30ms |
| Detection accuracy | 0.4cm |
| Fade area | Zero fade area |
| Beam angle | 60° |
| Sensor architecture | Ultrasonic transceiver with a single detector |
| Dimensions | 20 × 22 × 19 mm (0.79 × 0.87 × 0.75 in) |
| Weight | 8g (0.28oz) |
| Flight controller compatibility | RadioLink CrossRace, CrossFlight, PIXHAWK, Mini Pix and TURBO Pix; open-source PIXHAWK |
| Interfaces | Automatically identified I2C and UART (MAVLink protocol) |
| Obstacle avoidance and altitude holding | Obstacle avoidance in a maximum of 2 directions and altitude holdingConnected to CrossFlight, RadioLink or open-source PIXHAWK, Mini Pix, or TURBO PiX. |
| Training | Floor or ceiling collision avoidance during beginner drone trainingSU04 equipped on a drone during throttle operation. |
| Agriculture | Downward altitude holding over steep slopes or horizontal obstacle avoidance for agricultural operationSU04 equipped on an agricultural drone. |
| Package contents | 1 SU04; 1 Mini Pix I2C wire; 1 PIXHAWK I2C wire; 1 Mini Pix TELEM1&2 wire; 1 PIXHAWK TELEM1&2 wire; 1 packing bagSupplied package. |
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