Home Hardware, tips & troubleshooting

Hardware, tips & troubleshooting

8 articles

Connecting and calibrating the sensor

Sensor calibration is important for our system to be as accurate as possible.   After setting up your workout, you will be able to connect your Enode sensor if you are using one. To connect the Enode sensor, place the sensor next to your device and tap connect. Once a sensor is connected, you will see a real-time 3D representation with 6 marked sides. Now you can place the sensor briefly on each side (it is best to do this on a flat surface), wait for the orange dots to disappear, and then repeat for each side of the sensor. Calibration is not always needed; the sensor decides if it's necessary or not.    When finishing a workout, you can also decide if you want to keep the sensor connected. This is especially helpful if you have back-to-back sessions, meaning you will not have to recalibrate the sensor when starting the next workout.   Manual calibration can also be performed without direct feedback from the app. To do this, place the sensor on each of the 6 sides for about 3 seconds. In the background, the sensor is also recalibrated, which can help with any measurement problems. Additionally, if you tap the battery icon, a box will pop up with the option to calibrate manually. For the Bar Sensor Kit, pay attention to the markings on the sides to place the sensor according to the markings in the app.

Last updated on Apr 30, 2026

Sensor tracking (troubleshooting and tips)

Before you continue reading, please check if your sensor has the latest firmware installed and if you are using the provided barbell strap (if using an Enode Sensor). Similarly, ensure the Bar Sensor Kit is properly placed inside the barbell sleeve.  Like any other measuring device, the measurement technology within an IMU (the technology at work in our sensors) works reliably within a defined range. Due to environmental influences, impacts, or strong vibrations, measuring ranges can be exceeded. These out-of-range conditions cause the measured values to drift, leading to deviations in the output data or even missed repetitions.  In the following article, we show the most frequent causes and suggested solutions in this context. 1. Minimum Distance: The minimum distance defined for the exercise and athlete is set too high. Lower it by at least 10 cm (approximately 4 inches) below your average distance, which you typically cover in this exercise. This setting is in place so that, for example, lifting the barbell out of a rack does not generate a repetition. 2. Maximal Inclination: If an exercise with the equipment barbell is selected, a restriction of 20 degrees of inclination is applied. Repetitions exceeding this are automatically invalidated.  3. Velocity Threshold: If the velocity falls below a certain level (around 0.10 m/s), the sensor can't measure it, and the repetition is considered finished. If the minimum distance has not been exceeded by then, no repetition will be registered. This usually only happens with repetitions close to 1RM attempts. 4. Impacts & Vibrations: Only one or a few repetitions of a set are recorded in each set. The reason is in 99% of cases, impacts on the barbell or strong vibrations are caused by wobbly iron plates. Probably the best example here is the deadlift. When in doubt, try to leave a pause of up to 2 seconds between them while looking for the sensor ready icon. Pay attention to what you do with the barbell and the sensor before the start of a set. The data can drift if the barbell is rolled before lift-off or the hook of the rack is hit. Please Note If the above tips do not lead to any improvement, you can always contact us. Providing more information increases the likelihood of finding a solution. A video demonstrating the problem is usually the most helpful, but data exports or screenshots can also assist in finding a solution. If none of these options are available, please let us know in which exercises the issues typically occur.  

Last updated on Apr 30, 2026

Available metrics

1. Velocity metrics - Repetition mean velocity - Repetition peak velocity - The repetition mean propulsive velocity is the mean velocity in the acceleration phase - The repetition movement velocity is defined as velocity per distance 2. Power metrics - Repetition mean power - Mean power over the first propulsive phase - Repetition peak power 3. Force metrics - Repetition mean force - Repetition peak force - The peak rate of force development is calculated in 40 ms intervals over the whole phase of a lift 4. Time metrics - Repetition overall duration - Duration of the first propulsive phase - Distance of the first propulsive phase - Time to peak velocity within the concentric phase of one repetition - Time to peak power within the concentric phase of one repetition - Time to peak force within the concentric phase of one repetition - Contact time is the duration the feet are on the ground during a drop jump, measured from landing to takeoff 5. Spatial metrics - Repetition overall distance - Sagittal projection of the bar path - Frontal projection of the bar path - Minimal angle in 3D space between start and end positions of rep phase - Jump height is defined as the vertical difference of the center of mass from the - moment of takeoff, at which no more force is generated, to the highest point 6. Index metrics - The modified reactive strength index (RSI Mod) is calculated by jump height divided by time to take off - The reactive strength index (RSI) is calculated by jump height divided by the contact time 7. Loading metrics - Total volume load of a session including warmup sets - Total volume inertia of a session, including warmup sets - The one-repetition maximum is the highest load to be moved concentrically 8. Exertion metrics - The exertion of a set rates how hard a set was

Last updated on Apr 30, 2026

Barbell Strap usage and sensor placement

To securely attach the sensor to a barbell, or other training equipment, we recommend always using the Enode Sensor package included Barbell Strap. To use, insert the sensor sideways into the provided sensor pocket.  This works identically for the Extended Strap and the Hip belt. The Extended Strap can also be used with a barbell.   When placing the sensor on a barbell, a central placement should always be preferred to an external placement. The advantages of this are: - No risk of the sensor getting caught between the barbell and hooks in a rack - Reduced the influence of barbell vibrations on the measurements In general, the E on the sensor must be readable by the athlete. Consistent placement is essential for objective data.

Last updated on Apr 30, 2026

Solve Bluetooth connection issues

Remove cases with metallic components, as these can sometimes lead to significant range restrictions. *VMP relates specifically to Android devices. Case 1: I can't connect at all. Make sure the sensor is charged and can still charge, as indicated by the LED during charging. 1. If the sensor doesn't charge and can't connect even though you recently used it, leave the sensor unplugged from power for at least 12 hours and try to charge it again. If it's still not charging, try the following: Battery charging guidelines 2. Place the sensor and mobile device relatively close together (less than 10 cm). If in doubt, let the sensor touch the device while the app is searching for it. It might be necessary to place the sensor very close to the upper part of the smartphone, especially with devices from Huawei, Samsung, or other brands. 3. Make sure that the device named "VMP" is not connected in the Android Bluetooth settings. If it is, disconnect it and ensure it does not reconnect. 4. Make sure that the app is allowed to access your "location services". This is necessary for a Bluetooth connection. 5. Make sure location services and/or GPS are activated. 6. If you still can't connect within the app, turn Bluetooth off and back on again. 7. If you still can't connect within the app, restart the device. Case 2: The connection is broken or unstable. Due to Bluetooth chips being mostly used in cheaper phones and tablets, some devices may not be able to connect to an Enode Sensor and a Bluetooth speaker/headphones simultaneously. Bluetooth devices that transmit sound tend to utilize up to 100% of the available bandwidth. Android, as an operating system, plays its part. A potential solution is to disconnect all other Bluetooth devices. Another option is to try connecting the speaker/headphones after initially connecting the Enode Sensor.

Last updated on Apr 30, 2026

Battery charging guidelines

Are you experiencing difficulty charging the sensor after it has been idle in the corner for a long time? Since our sensors are always turned on, it is possible that if a sensor is not used for an extended period of time (6 months or more), the battery may become deeply discharged. This may be indicated by the LED no longer turning on during charging. To make the affected sensors chargeable again, you can try connecting the sensor to a charging source for a few minutes and then disconnecting it for a minute. Repeat this process until the LED lights up again, or repeat a maximum of 10 times. The attempt to revive the sensor should therefore take at least 20 minutes before a definitive conclusion can be reached. Please do not attempt to perform this process on the USB port of a computer. Once the LED lights up again, keep the sensor connected to the charger until it is fully charged (LED turns off). If this does not work, please contact support.   Turning the sensor off and on again If you can connect the sensor, tap the battery percentage icon, and then tap the power button that pops up in the context box. This will shut down the sensor. It will turn back on again when connected to power.   Other Recommendations for Charging Discipline 1. Disconnect the load when charging so that the current can drop unhindered during charging. A disturbing load will confuse the charger. 2. Charge at a moderate temperature. Do not charge at sub-zero temperatures. 3. Lithium-ion batteries do not need to be fully charged; a partial charge is better for longevity. 4. Not all chargers will perform a full charge, and the battery may not be fully charged. 5. Do not use the charger and/or battery if the battery becomes excessively warm. 6. Charge a low-charge battery before storing the sensor for a long period of time; turn off the sensor completely if stored for a long period of time (see screenshots).

Last updated on Apr 30, 2026

App and Sensor beta program

Our beta firmware is generally suitable for production use and is used to verify the changes we have made against a wider audience. To participate in the beta firmware program, go to the app's settings. Scroll down to find the toggle to participate in the beta program. If highlighted in color, it means that you want to participate in the program. The next time you connect a sensor, you may see an update available for the sensor firmware. To perform the update, simply press the corresponding button. After the update, the app will automatically search and reconnect to the sensor. The update to the beta firmware is now complete. If you no longer want to participate in the beta program, you can turn off the switch at any time and revert to the currently available stable firmware version via a further firmware update.   The app may also show additional features if you have the beta toggle switched on.

Last updated on Apr 30, 2026

Special considerations of Trap Bar Deadlifts

There are several variants of trap bars (sometimes also called hex bars). Depending on which variant is used for training, different settings must be made in the exercise definition. In the following, 2 variants are considered to illustrate the problem in more detail. The fact that this is a deadlift-like exercise ensures we always recommend using the included strap here. This absorbs impacts on the sensor. If problems occur, watch for the sensor ready icon to appear in the Direct Feedback View. Variant 1: Trap bar with space on the middle axis If, as illustrated, the sensor should be placed on the middle axis of the bar. You can select a barbell as the equipment for such sensor placement.   Variant 2: Trap bar without space on the middle axis If, as shown in the illustration, the sensor cannot be placed on the middle axis of the bar, Hex bar equipment should be selected. Otherwise, repetitions may not be reliably recorded. The sensor has certain expectations for an exercise declared as a barbell exercise, which the exercise may not be able to fulfill at any given repetition. More specifically, this relates to skewing of the sensor, which would be abnormal for a barbell movement. A similar issue can also occur with Landmine Press, for example.

Last updated on Apr 30, 2026