SKYDROID S2/S2mini Flight Control Avionics System User Manual

1. Introduction

The SKYDROID S2/S2mini is a multifunctional avionics system designed for various unmanned aerial vehicles (UAVs), multi-rotors, and unmanned vessels. This package provides comprehensive flight control capabilities, featuring automotive-grade sensors, abundant interfaces, and compatibility with multiple receivers. Its compact design allows for flexible installation in systems with stringent size and weight requirements.

2. Key Features

• Automotive-Grade Sensors: Equipped with high-performance inertial measurement unit (BMI088) for low-noise and low-drift characteristics.
• Abundant Interfaces: Includes SBUS input/output, GPS compass serial port, data transmission port, CAN ports, PWM output ports, obstacle avoidance interface, and Type-C port.
• Compact Design: The S2 Mini variant offers an extremely compact size (37mm x 37mm) for installations with strict volume and weight constraints.
• Receiver Compatibility: Compatible with various receivers, supporting multi-rotors, fixed-wing aircraft, VTOL, unmanned ground vehicles, and unmanned surface vessels.
• High-Precision GPS: Optional high-precision GPS for precise positioning and easy installation.
• Orientation Module: Optional module for RTK positioning and dual-antenna orientation calculation, offering high positioning accuracy.
• Easy Parameter Tuning: Utilizes the Skydroid Fly GCS APP for straightforward parameter configuration.
• Open-Source: Available for secondary development.

3. Specifications

The following table details the specifications for the S2 Avionics Systems:

S2 Mini Specifics

The S2 Mini retains most functions of the S2 but in a more compact form factor. Its dimensions are approximately 37mm x 37mm, making it ideal for devices with strict size and weight limitations.

4. Setup and Installation

4.1. Interface Overview

The S2/S2mini is equipped with a variety of interfaces to support diverse functionalities. Refer to the diagram below for a visual guide to the ports:

• TELEM1/SBUS IN: Telemetry and SBUS input port.
• CAN1, CAN2: Controller Area Network ports for communication with other devices.
• GPS: Dedicated port for GPS module connection.
• Type-C: USB Type-C port for configuration and data transfer.
• POW: Power input port.
• TELEM2: Secondary telemetry port.
• PWM + SBUS output + Obstacle avoidance interface: Combined port for PWM outputs, SBUS output, and obstacle avoidance sensor connection.

4.2. GPS Module Connection

For high-precision positioning, connect the optional GPS module to the dedicated GPS port on the S2/S2mini. Ensure the module is securely connected and mounted in a location with a clear view of the sky for optimal signal reception.

4.3. Receiver Compatibility and GR01 Receiver

The S2/S2mini is designed to be compatible with various receivers that feature a data transmission interface and an SBUS output interface. The Skydroid GR01 receiver is a recommended partner for the S2 due to its compact design and rich array of interfaces.

The GR01 receiver features the following interfaces:

• Source input (7.2V - 72V): Power input for the receiver.
• Indicator lamp: Status indicator.
• Frequency pairing button: For initiating pairing with a transmitter.
• Frequency pairing expansion interface: Additional port for pairing.
• Network port: For network communication.
• Antenna interface: For connecting receiver antennas.
• Upgrade interface: For firmware updates.
• PWM output: Pulse Width Modulation outputs.
• Data transmission interface + Network port SBUS output: Combined port for data transmission, network, and SBUS output.

4.4. Orientation Module Installation (Optional)

For advanced RTK positioning and dual-antenna orientation, install the optional orientation module. Connect the module and its dual antennas as shown in the diagram. Proper placement of the antennas is crucial for accurate orientation calculations and anti-interference capabilities.

5. Operating Instructions

5.1. Parameter Tuning with Skydroid Fly GCS APP

The Skydroid Fly GCS APP provides an intuitive interface for configuring the S2/S2mini's parameters. Follow these general steps:

1. Download and install the Skydroid Fly GCS APP on your compatible device.
2. Connect your S2/S2mini system to the device running the APP (e.g., via Type-C or telemetry link).
3. Launch the APP and establish a connection with the avionics system.
4. Navigate through the APP's menus to access various parameter settings, such as aircraft type (Quad, Hexa, Octa, Tri), flight modes, and sensor calibrations.
5. Adjust parameters as needed for your specific unmanned vehicle configuration. The APP is designed to make complex parameter tuning simple and clear.

6. Maintenance

To ensure the longevity and optimal performance of your SKYDROID S2/S2mini system, consider the following maintenance guidelines:

• Keep Clean: Regularly clean the exterior of the S2/S2mini and connected modules with a soft, dry cloth. Avoid using harsh chemicals or solvents.
• Inspect Connections: Periodically check all cable connections (power, signal, GPS, etc.) to ensure they are secure and free from damage. Loose connections can lead to intermittent operation or system failure.
• Environmental Protection: Operate and store the system within the specified operating temperature range (-40℃~80℃). Protect it from excessive moisture, dust, and extreme temperatures.
• Firmware Updates: Check the official SKYDROID website or APP for available firmware updates. Keeping the firmware up-to-date can improve performance, add new features, and fix bugs.

7. Troubleshooting

If you encounter issues with your S2/S2mini system, try the following troubleshooting steps:

• No Power:
  • Verify the power input voltage is within the 2S-18S range.
  • Check all power connections for secure fit and continuity.
• No Signal/Communication:
  • Ensure the receiver is properly paired with the transmitter.
  • Check SBUS and data transmission cable connections.
  • Confirm the Skydroid Fly GCS APP is connected to the avionics system.
• GPS Issues:
  • Ensure the GPS module is connected correctly to the GPS port.
  • Verify the GPS module has a clear view of the sky.
  • Check for any obstructions or electromagnetic interference.
• Incorrect Flight Behavior:
  • Review parameter settings in the Skydroid Fly GCS APP. Incorrect configuration for aircraft type or sensor calibration can cause issues.
  • Perform sensor calibration if necessary.

If problems persist, consult the official SKYDROID support resources or contact customer service.

8. User Tips

• Always double-check all wiring and connections before powering on your system to prevent damage.
• Familiarize yourself with the Skydroid Fly GCS APP thoroughly before attempting complex configurations.
• For optimal GPS performance, ensure the GPS module is mounted away from other electronics that might cause interference.
• When using the S2 Mini, take advantage of its compact size for stealthy or space-constrained builds, but ensure adequate cooling if operating in high-temperature environments.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the official SKYDROID website or contact your authorized dealer. Keep your purchase receipt as proof of purchase for warranty claims.