RadioLink SU04 Ultrasonic Sensor for PIXHAWK/Mini Pix Obstacle Avoidance and Altitude Holding

Overview

The RadioLink SU04 is a high-performance ultrasonic obstacle avoidance and altitude-holding sensor designed for helicopters, multirotors, fixed-wing airplanes, RC cars, and boats. With a compact size of 20×22×19mm, ultra-lightweight 8g, and low power consumption of only 90mW, SU04 offers extremely fast 30ms response thanks to dual hardware/software filters and a 32-bit processor. It features a 0.4cm detecting precision, 60° beam angle, 40–450cm detection range, and no fade zone, ensuring accurate real-time environmental awareness.

Key Features

• Ultra-fast Response: 30ms work cycle enabled by dual filtering technology

• Precise Detection: 0.4cm resolution with 60° transceiver beam angle

• Zero Fade Area: Ensures reliable sensing even at close range

• Flexible Mounting: Supports detection in any 2 directions or 1 direction with up/down sensing

• Wide Compatibility: Supports I2C and UART (MAVlink) protocols

• Multiple Flight Controllers Supported: PIX, PIXHAWK, Mini Pix, TURBO PiX, CrossFlight, CrossRace, CrossFlight-CE, CrossRace Pro

• Broad Application: Perfect for obstacle avoidance and altitude holding in drones, RC vehicles, and boats

Specifications

Working Principle

Using ultrasonic echo transmission, SU04 emits and receives ultrasonic waves within a 30ms cycle, accurately detecting nearby obstacles. The sensor enables real-time height sensing and environment feedback for safe navigation, even in complex terrains like hills or slopes.

Applications

• Agricultural Drones: Terrain-following spray missions with downward slope detection

• FPV and Racing Drones: Lightweight sensor ideal for obstacle detection in tight spaces

• Autonomous Vehicles: Accurate distance measurement and real-time avoidance in RC cars and boats

• Training & Outdoor Operation: Safety enhancement with instant height feedback and obstacle sensing

Mini Pix Wiring Diagram

SU04 connects to Mini Pix or other supported FCs via I2C or UART, with an I2C transfer board enabling easy integration for altitude holding and obstacle avoidance functionalities.

Package Contents

Details

Ultrasonic Sensor SU04 adapts to helicopters, multirotors, airplanes, cars, and boats. Features dual filters, 30ms response time, 0.4cm precision, 60° beam angle for accurate obstacle avoidance.

SU04 ultrasonic sensor uses hardware and software dual filters for 30ms fast response, ensuring accuracy. Compatible with CrossRace, Pixhawk, Mini Pix, TURBO Pix, and open-source PIXHAWK via I2C and UART protocols.

SU04 ultrasonic sensor with 0.4cm precision and 60° beam angle.

SU04 ultrasonic sensor ensures real-time environment detection and obstacle sensing. Connect with crossflight, PIXHAWK, Mini Pix, or TURBO PiX for safer flight with 60° beam angle.

SU04 ultrasonic transceiver, 20x22x19mm, 8g weight. SR05 version ensures safety for outdoor drone operations and training. Ideal for agriculture, enabling precise altitude control and obstacle avoidance.

Mini Pix Connection diagram includes GPS, I2C Transfer Board, Altitude Holding LED Module, Flight Controller, and Obstacle Avoidance.

SU04 Package List: SU04*1, Wire for Mini Pix(I2C)*1, Wire for PIXHAWK(I2C)*1, Wire for Mini Pix(TELEM1&2)*1, Wire for PIXHAWK(TELEM1&2)*1, Packing bag*1.

RadioLink SU04 Ultrasonic Sensor: 20x22x19mm, 8g, 4.5-5.5V, 90mW power, -30 to 85°C, 40-450cm range, 0.4cm precision, 60° beam angle, I2C/UART output, compatible with various flight controllers and models.