MetaMotionRL (MMRL)¶
MetaMotionRL is powered by a rechargeable lithium-polymer (LiPo) battery. It has a typical battery life of 1 to 14 days.
Since it is USB powered, you can add a battery pack to get even more life out of your MetaMotionRL.
The MMRL optionally comes with a plastic case. Please note that the proximity of the battery to the PCB when encased reduces the Bluetooth range.
Details¶
| Name | Battery | Size | Memory |
|---|---|---|---|
| MMRL | 100mAh recharge lipo | 17mm x 25mm x 5mm | 8MB (~1M entries) |
Battery Life¶
How long the MMRL runs depends on which sensors are active, the sample rate, and whether you're logging (recording to onboard memory while disconnected) or streaming live over Bluetooth. Streaming is far more power-hungry — the radio alone draws roughly 7.5 mA.
For a logging session, two things run down and whichever empties first ends the session: the battery and the 8 MB onboard flash. On the MMRL the flash is small, so at high sample rates it — not the battery — is the limit. The table below shows both for common configurations at 100 Hz.
| Configuration (100 Hz) | Battery life | Flash fills | Lasts about |
|---|---|---|---|
| Accelerometer only — logging | ~23 days | ~1.5 hours | ~1.5 hours |
| Full IMU (accel + gyro + mag) — logging | ~2.6 days | ~30 minutes | ~30 minutes |
| Sensor fusion → Euler angles — logging | ~1.7 days | ~45 minutes | ~45 minutes |
| Sensor fusion → Euler angles — streaming over BLE | ~10 hours | n/a | ~10 hours |
On the MMRL the 8 MB flash, not the battery, is what caps high-rate logging — at 100 Hz it fills in minutes to an hour or two. To capture for longer, lower the sample rate (flash time scales inversely with rate), stream over Bluetooth (~10 hours, but the device must stay in range of a connected phone), or use the MetaMotion S (512 MB) for multi-day high-rate captures.
These are ballpark figures — real life shifts with temperature, battery age, Bluetooth settings, and exact rates. The per-sensor current draws and formulas behind them are in Sensor Power Consumption and Logging Memory Capacity.
Downloads¶
| Document | Link |
|---|---|
| Datasheet | MetaMotionRPS |
| Schematic | MetaMotionR0.5 |
| CAD Model | STEP File |
| Case CAD | Rectangle Case STEP |
| Certificates | MetaMotion Module |
Sensor Datasheets¶
| Name | Accelerometer | Gyroscope | Magnetometer | Temperature | Pressure | Light |
|---|---|---|---|---|---|---|
| MMRL | BMI160 | BMI160 | BMM150 | on-board | none | none |
Steps to get started¶
1. Unbox¶
Unbox your MetaMotionRL.
2. Power¶
Plug in your MetaMotionRL using a micro USB cable to charge the battery.
3. Wake Up¶
The MMRL will blink when charging.
4. Connect¶
Download the App of your choice to start working with your MMRL.
Troubleshooting¶
Recharge the battery with a micro-USB to USB cable plugged in to power (AC adapter or computer) when you are not using it.
Troubleshoot any issues by following the steps here.