GoolRC Flysky FS-SR12 Receiver User Manual

1. Introduction

The GoolRC Flysky FS-SR12 is a 2.4GHz 12-channel receiver designed for various remote-controlled models, including fixed-wing aircraft, helicopters, gliders, multicopters, construction vehicles, boats, robots, and cars. It utilizes the advanced ANT protocol for reliable communication and features dual antennas for stable signal reception.

This receiver supports multiple signal output types: PWM, PPM, i-BUS, and S.BUS, ensuring broad compatibility with different flight controllers and servos. Its compact design facilitates easy installation in a wide range of applications.

Figure 1.1: The FS-SR12 receiver shown alongside compatible Flysky FS-G7P and FS-ST8 radio transmitters. The receiver supports 12 PWM channels and features dual antennas for enhanced signal stability.

2. Product Overview and Package Contents

The FS-SR12 receiver is designed for ease of use and robust performance. Below is an overview of its components and the items included in the package.

2.1 Receiver Components

Figure 2.1: Detailed diagram illustrating the various ports and features of the FS-SR12 receiver. Key components include PWM channels (1-12), SERVO/SENS/BVD/VCC/BIND interfaces, LED indicator, antennas, BIND button, and power connections.

The receiver features clearly labeled ports for easy connection:

• CH1/PPM to CH12: 12 PWM output channels. CH1 also supports PPM output.
• SERVO/S.BUS interface: For connecting servos or S.BUS compatible devices.
• SENS interface: For sensor connections.
• BVD/VCC interface: For battery voltage detection and power input.
• BIND button: Used for pairing the receiver with a compatible transmitter.
• LED indicator: Provides status feedback (e.g., binding status, signal strength).
• Antennas: Dual antennas for improved signal reception and reliability.

2.2 Package Contents

Upon opening the package, you should find the following items:

• 1 x Flysky FS-SR12 Receiver

Figure 2.2: The FS-SR12 receiver with its two flexible antennas extended, ready for installation.

3. Setup and Binding

This section guides you through the initial setup and binding process of your FS-SR12 receiver with a compatible Flysky transmitter.

3.1 Compatibility

The FS-SR12 receiver is compatible with Flysky transmitters that support the ANT protocol, such as the FS-ST8, FS-G7P, and FS-MG4.

Figure 3.1: A comprehensive table detailing the compatibility between various Flysky transmitters and receivers, indicating full or semi-compatibility.

Note on Compatibility Table:

• A "✓" indicates full compatibility.
• A "✓" with a note indicates semi-compatibility, meaning basic channel signal output can be used.
• Some transmitters may match with specialized receivers (gyro, barometer) but can be used as ordinary receivers.
• Binding procedures may vary: For FS-R4B and FS-R4P, the one-way mode of the transmitter is used. For HW-709, HW-711, FS-R4A, FS-R4A1, and FS-R4D-ESC, the two-way mode is used.

3.2 Binding Procedure

To establish a connection between your FS-SR12 receiver and your transmitter, follow these steps:

1. Ensure your transmitter is powered off.
2. Connect a binding plug (not included, typically comes with the transmitter or can be purchased separately) to the BIND port on the FS-SR12 receiver. Alternatively, press and hold the BIND button while powering on the receiver.
3. Apply power to the FS-SR12 receiver (3.5V to 9V DC). The LED on the receiver should start flashing rapidly, indicating it is in binding mode.
4. While the receiver LED is flashing, power on your compatible Flysky transmitter.
5. Navigate to the binding menu on your transmitter (refer to your transmitter's manual for specific instructions).
6. Initiate the binding process on the transmitter.
7. Once binding is successful, the LED on the receiver will stop flashing and remain solid, indicating a stable connection.
8. Power off both the receiver and the transmitter.
9. Remove the binding plug (if used) from the receiver.
10. Power on the transmitter first, then the receiver, to confirm the connection. The receiver LED should be solid.

Figure 3.2: The front face of the FS-SR12 receiver, highlighting the LED indicator and the BIND button, crucial for the binding process.

Figure 3.3: Side view of the FS-SR12 receiver, illustrating the arrangement of the 12 PWM/signal output ports.

3.3 Antenna Placement

Proper antenna placement is crucial for optimal signal reception and range. The FS-SR12 features dual antennas. Ensure they are:

• Mounted at a 90-degree angle to each other to maximize signal diversity.
• Kept away from carbon fiber, metal parts, or any other conductive materials that can block or reflect RF signals.
• Not bent or kinked excessively, as this can damage the internal wiring and reduce performance.

4. Operating the Receiver

Once bound, the FS-SR12 receiver is ready for operation. It provides various signal output options to suit different applications.

4.1 Signal Output Modes

The receiver supports the following data output modes:

• PWM (Pulse Width Modulation): Standard output for individual servos and ESCs. The FS-SR12 provides 12 independent PWM channels.
• PPM (Pulse Position Modulation): A single wire carries all channel data, often used for flight controllers.
• i-BUS: Flysky's proprietary digital serial bus protocol, offering multiple channels over a single wire.
• S.BUS: Futaba's digital serial bus protocol, widely used for connecting multiple servos or flight controllers with minimal wiring.

The specific output mode can typically be configured via your compatible Flysky transmitter's settings.

4.2 Online Update

The FS-SR12 receiver supports online firmware updates. This feature allows for performance improvements, bug fixes, and compatibility enhancements. Refer to the official GoolRC or Flysky website for the latest firmware and update instructions.

5. Maintenance

Proper maintenance ensures the longevity and reliable performance of your FS-SR12 receiver.

• Environmental Conditions: Avoid exposing the receiver to extreme temperatures, high humidity, or direct sunlight. The recommended operating temperature range is -10℃ to +60℃, and humidity range is 20% to 95%.
• Moisture: Keep the receiver dry. Moisture can cause corrosion and damage electronic components. If the receiver gets wet, disconnect power immediately and allow it to dry completely before re-applying power.
• Cleaning: Use a soft, dry cloth to clean the receiver. Do not use solvents or abrasive cleaners.
• Physical Protection: Protect the receiver from physical shocks and vibrations. Mount it securely within your model.
• Antenna Care: Regularly inspect the antennas for any signs of damage (e.g., cuts, kinks). Damaged antennas can significantly reduce range and signal quality.

Figure 5.1: The underside of the FS-SR12 receiver, showing its robust casing designed for protection.

6. Troubleshooting

If you encounter issues with your FS-SR12 receiver, refer to the following common problems and solutions:

7. Specifications

Detailed technical specifications for the GoolRC Flysky FS-SR12 Receiver:

Figure 7.1: Visual representation of the FS-SR12 specifications, including its dimensions.

8. Warranty and Support

For warranty information, technical support, or further inquiries regarding your GoolRC Flysky FS-SR12 receiver, please refer to the official GoolRC website or contact their customer service. Keep your purchase receipt as proof of purchase for any warranty claims.

GoolRC is committed to providing quality products and support for your RC hobby needs.