How to Pair the Magene S314 Speed and Cadence Sensor with Your Bike Computer or App

Pairing your Magene S314 speed and cadence sensor with your cycling computer or smartphone app is a straightforward process that immediately unlocks deeper insights into your riding performance. Whether you are navigating busy urban park connectors, training indoors on a smart trainer, or tracking your weekend road loops, having real-time speed and cadence data helps you optimize your pedaling efficiency and pace your efforts. To establish a successful connection, you must first configure the sensor for your desired metric, mount it securely, and then use either ANT+ or Bluetooth protocols to link it to your receiving device.

Preparing the Magene S314 for Pairing

Before attempting to pair the sensor, you must prepare the hardware. The Magene S314 uses a standard CR2032 coin-cell battery. Open the battery cover on the back of the sensor, insert the battery with the positive (+) side facing up, and secure the cover tightly to maintain weather resistance.

The S314 is a single-unit dual-mode sensor, meaning it can function as either a speed sensor or a cadence sensor, but not both simultaneously. To switch between these two modes, you must remove and reinsert the battery. Pay close attention to the LED indicator light on the front of the sensor when you reinstall the battery. One color indicates the sensor is in cadence mode, while the other color indicates it is in speed mode. Verify that the light matches your intended use before mounting.

To wake the sensor from its low-power sleep state, you must physically move it. If configured for cadence, rotate the crank arm several times. If configured for speed, spin the wheel hub. The sensor will remain active and discoverable for a short window after movement stops.

Mounting the sensor correctly is vital for accurate readings and safety. For cadence mode, use the included rubber protective pad and secure the sensor to the inside of your non-drive side crank arm using the provided rubber bands. Ensure there is sufficient clearance so the sensor does not strike your bike frame or chainstays during a ride.

For speed mode, mount the sensor directly to your front or rear wheel hub. Wrap the rubber bands securely around the hub shell. Double-check that the sensor is centered and does not wobble or slide, especially when riding over uneven pavement or damp roads.

Pairing with a Cycling Computer via ANT+ or Bluetooth

Dedicated cycling computers generally support both ANT+ and Bluetooth connection protocols. For the most stable connection with a head unit, ANT+ is highly recommended because it allows the sensor to broadcast to multiple devices simultaneously and typically consumes less power.

Turn on your cycling computer and navigate to the main settings menu. Look for a sub-menu labeled “Sensors,” “Connections,” or “Add Sensor.”

Before initiating the search on your head unit, spin your bike’s crank arm or wheel to ensure the Magene S314 is awake and broadcasting its signal.

Select the “Search New” or “Add Sensor” option on your computer. The head unit will scan the immediate area for active wireless signals.

Once the computer detects the sensor, it will display a device ID number on the screen. This ID is unique to your sensor. Select the ID and confirm the pairing request.

If you are using two separate S314 sensors to track both speed and cadence, you will need to repeat this search and pairing process for each sensor individually, ensuring one is recognized as a speed sensor and the other as a cadence sensor.

After successfully pairing, navigate to your computer’s data page settings. Customize your screen layout to include the relevant data fields, such as “Cadence” (measured in revolutions per minute, or RPM) and “Speed” (measured in kilometers per hour, or km/h), so you can monitor your metrics clearly while riding.

Connecting to Smartphone Cycling and Training Apps

If you prefer to use your smartphone as your primary cycling computer or for indoor training apps, you will connect the Magene S314 using Bluetooth.

First, ensure that Bluetooth is enabled in your smartphone’s system settings. However, do not attempt to pair the sensor directly within your phone’s native Bluetooth menu. The sensor must be paired directly inside your chosen cycling app to function correctly.

Open your preferred cycling or training app on your phone. Navigate to the app’s settings or device connection screen, often represented by a gear icon or a sensor icon.

Modern mobile operating systems require you to grant location services or “nearby devices” permissions to the cycling app. Without these permissions, the app cannot scan for local Bluetooth low energy (BLE) devices. Ensure these permissions are enabled in your phone’s privacy settings.

With the app’s sensor menu open, spin the crank or wheel to wake the S314. Tap the “Search” or “Connect” button within the app.

When the sensor’s ID appears on the app screen, select it to pair. Some apps may ask you to manually assign the sensor’s role as either “Speed” or “Cadence.” Select the correct option based on how you have configured and mounted the physical sensor.

Once connected, keep the app open and perform a quick test spin to verify that the virtual dials or data fields on your phone screen begin updating with live numbers.

Verifying Data and Troubleshooting Connection Issues

Before heading out on a ride, always perform a quick verification check. Lift your bike and spin the pedals or the wheel containing the speed sensor. The corresponding numbers on your head unit or phone screen should update within a few seconds.

If your device displays a “sensor not found” error, the most common culprit is a sleeping sensor. Give the crank or wheel a vigorous spin to wake it up. If it still does not respond, remove the battery cover, verify that the battery is oriented correctly, and check that the metal contact tabs inside the compartment are making clean contact with the battery.

Wireless interference can also disrupt the pairing process. If you are setting up your sensor in a room with multiple active wireless routers, smart TVs, or other Bluetooth accessories, try moving your bike to an open outdoor space or a different room to complete the pairing.

Intermittent data drops during a ride are often caused by physical movement or vibration. Check that the rubber bands securing the sensor are tight and have not degraded. In humid climates, moisture can occasionally seep into the battery compartment; open the cover, wipe away any condensation, and ensure the rubber O-ring seal is seated properly.

If you experience persistent connection issues that cannot be resolved by changing the battery or re-pairing, consult the official user manual or contact customer support to check for potential firmware updates or hardware issues.

Frequently Asked Questions (FAQ)

Can I connect the Magene S314 to my bike computer and phone app simultaneously?

Yes, you can connect the sensor to multiple devices at the same time by utilizing both ANT+ and Bluetooth channels. The ANT+ protocol allows the sensor to broadcast to an unlimited number of receiving devices, such as your dedicated bike computer and an indoor trainer setup. Meanwhile, the Bluetooth channel can typically connect to one smartphone or tablet app at a time. This dual-channel capability allows you to record your ride data on your head unit while simultaneously feeding live metrics to a mobile training application.

Why is my head unit only showing speed or cadence, but not both?

A single Magene S314 sensor can only operate in one mode at a time—either speed or cadence—depending on how the battery was installed. It cannot transmit both metrics simultaneously from a single unit. If you want to track both speed and cadence on your head unit, you must purchase and install two separate S314 sensors. Set one to speed mode (mounted on the wheel hub) and the other to cadence mode (mounted on the crank arm), then pair both individual sensors to your computer.

Do I need to calibrate the sensor or set the wheel size after pairing?

Cadence sensors do not require any calibration or manual input, as they simply count the physical revolutions of your crank arm. However, if you are using the S314 as a speed sensor, you must configure your wheel size in your bike computer or app settings to ensure accurate speed and distance calculations. While some modern GPS head units offer an auto-calibration feature that estimates wheel size using GPS data, manually inputting your exact tire circumference (measured in millimeters) provides the most consistent and accurate tracking, especially when riding under heavy tree cover or indoors.