1. Introduction
The CYCPLUS ANT+ USB Dongle U2 is a compact and efficient device designed to bridge the gap between your indoor cycling equipment and various virtual training platforms. It receives wireless ANT+ signals from your sensors (such as speed, cadence, heart rate, and power meters) and transmits them to your computer via USB, enhancing your indoor cycling experience with interactive software.
This package includes one USB ANT+ dongle and a 3-meter (9.8 feet) USB extension cable for optimal placement and signal reception.

Figure 1: CYCPLUS ANT+ USB Dongle and included 3-meter extension cable.
2. Setup Instructions
Setting up your CYCPLUS ANT+ USB Dongle U2 is a straightforward process. Follow these steps to get started:
- Unpack the Device: Carefully remove the USB ANT+ dongle and the 3-meter extension cable from its packaging.
- Connect to Computer: Insert the USB ANT+ dongle into an available USB port on your PC or laptop. If your computer is not close to your cycling setup, use the provided 3-meter extension cable to position the dongle closer to your sensors for better signal strength.
- Driver Installation: Upon connecting, your computer (Windows OS recommended) should automatically detect the device and install the necessary drivers. No manual driver installation is typically required.
- Software Integration: Open your preferred cycling software (e.g., TheSufferfest, TrainerRoad, Zwift, Rouvy). Navigate to the device pairing or sensor settings section within the software.
- Search for Devices: Initiate a search for ANT+ devices within your cycling software. The dongle will enable the software to detect your ANT+ compatible sensors (heart rate monitors, speed/cadence sensors, power meters).
- Pair Sensors: Select and pair your desired ANT+ sensors with the software. Ensure your sensors are active and within range of the dongle.

Figure 2: Visual guide for the 3-step setup process: 1. Take out the USB ANT+ stick, 2. Plug it into the computer, 3. Search for devices in the cycling software.

Figure 3: Example setup showing the ANT+ dongle connected to a laptop, facilitating data transfer from a bike on an indoor trainer to a virtual cycling platform displayed on a monitor.
3. Operating Instructions
Once the dongle is set up and your sensors are paired, the CYCPLUS ANT+ USB Dongle U2 operates seamlessly in the background, transmitting data from your ANT+ sensors to your chosen cycling application.
- Automatic Connection: After initial setup, the dongle will typically connect automatically to your paired sensors when they are active and within range, and your cycling software is running.
- Optimal Range: For best performance, ensure the dongle is placed within 3 meters (approximately 9.8 feet) of your ANT+ sensors. While the maximum range is 5 meters, closer proximity improves signal reliability.
- Compatible Software: The dongle is compatible with popular indoor cycling applications including TheSufferfest, TrainerRoad, Zwift, and Rouvy. Ensure your software is up-to-date for the best experience.
- Multiple Channels: The dongle supports 8 channels, allowing it to receive data from multiple ANT+ sensors simultaneously.

Figure 4: The ANT+ dongle facilitates data transfer to cycling software running on laptops, enabling an immersive virtual cycling experience.
4. Specifications
| Feature | Detail |
|---|---|
| Brand | CYCPLUS |
| Model Number | U2 |
| Color | Black |
| Material | ABS |
| Dimensions (Dongle) | 18.5 x 14.5 x 6 mm |
| Weight (Dongle) | 1.7 g |
| Radio Protocol | 2.4 GHz ANT+ wireless communication protocol |
| Range | Up to 5 meters (best performance under 3 meters) |
| Channel Number | 8 |
| Hardware Interface | USB |
| Compatible Devices | PC, Laptop (Windows OS) |
| Included Accessories | 3-meter USB extension cable |

Figure 5: Detailed dimensions of the CYCPLUS ANT+ USB Dongle.
5. Troubleshooting
If you encounter issues with your CYCPLUS ANT+ USB Dongle U2, please refer to the following common troubleshooting steps:
- Dongle Not Recognized:
- Try plugging the dongle into a different USB port on your computer.
- Restart your computer.
- Ensure your operating system is up-to-date.
- If using the extension cable, try connecting the dongle directly to the computer to rule out cable issues.
- Sensors Not Pairing/Connecting:
- Ensure your ANT+ sensors are turned on and have fresh batteries.
- Verify the dongle is within 3 meters of your sensors.
- Close and reopen your cycling software.
- Check the sensor pairing settings within your cycling software to ensure they are correctly configured.
- Ensure no other ANT+ devices or strong wireless signals are causing interference.
- Intermittent Signal Loss:
- Relocate the dongle closer to your sensors, especially if using the extension cable.
- Ensure there are no physical obstructions (e.g., metal objects, thick walls) between the dongle and your sensors.
- Minimize other wireless interference (e.g., Wi-Fi routers, microwaves, other ANT+ devices).
6. Maintenance
The CYCPLUS ANT+ USB Dongle U2 requires minimal maintenance to ensure its longevity and optimal performance:
- Cleaning: Use a soft, dry cloth to wipe the dongle clean. Avoid using liquid cleaners or abrasive materials.
- Storage: When not in use, store the dongle in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Handle the dongle with care. Avoid dropping it or subjecting it to strong impacts.
7. Warranty and Support
All CYCPLUS products, including the ANT+ USB Dongle U2, come with a one-year warranty from the date of purchase and lifetime service.
If you have any questions, encounter issues not covered in this manual, or require technical assistance, please do not hesitate to contact CYCPLUS customer support. Refer to the product packaging or the official CYCPLUS website for the most current contact information.

