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license: apache-2.0
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# Pebble Tracker

Pebble is a battery-powered, cellular-based, multi-sensor development board designed by [IoTeX](https://iotex.io/) and [Nordic Semiconductor](https://www.nordicsemi.com/), combining tamper-proof hardware and tamper-proof software to generate verifiable data. Built around Nordic Semiconductor’s latest low-power nRF9160 System-in-Package (SiP) and driven by open-source firmware, Pebble Tracker is equipped with GPS support, a variety of rich sensors, NB-IoT/LTE-M connectivity, and advanced security features that make it ideal for sophisticated logistical applications where trust is paramount. In combination with the IoTeX blockchain, its on-board capabilities allow developers to design and build innovative, decentralized IoT solutions that go well beyond conventional asset tracking. More information about Pebble Tracker can be found at https://docs.iotex.io/ecosystem/powered-by-iotex-devices/pebble-tracker.

## Integrated Sensors

Pebble combines an environmental sensor (temperature, relative humidity, barometric pressure, altitude, and volatile organic compounds - VOCs), a motion sensor (3-axis gyroscope, 3-axis accelerometer), and an ambient light sensor. It's also equipped with cellular network connectivity and integrated GPS supporting precise, long range tracking of asset data using established cellular infrastructure.

| Sensor   | Details |
| -------- | ------- |
| Environmental Sensor BME680 | Relative humidity <br> Barometric pressure <br> Ambient temperature <br> Air quality (VOC) |
| Motion Sensor ICM-42605 | 3-axis gyroscope <br> 3-axis accelerometer |
| External GPS TD1030 | Position accuracy: 3m <br> Speed accuracy: 0.1 m/s <br> Data frequency: 1 hz to 10 Hz|
| Ambient Light Sensor AMS TSL2572 | 45,000,000:1 Dynamic Range <br> Operation to 60,000 lux in Sunlight <br> Very High Sensitivity <br> Package UV Rejection Filter |

# IoTeX Pebble Dataset 
<!-- Provide a quick summary of the dataset. -->

This dataset contains data from the real physical world collected by Pebble devices. 

## Dataset Structure

| Sensor Data | Data Type | Description |
| -------- | ------- | ------- |
| Snr           | string | Signal-to-noise ratio of NB-IoT/LET-M | 
| Vbat          | string | Voltage of battery |
| GasResistance | string | Air quality (indoor) |
| Temperature   | string | Environmental temperature |
| Pressure      | string | Air pressure |
| Humidity      | string | Environmental humidity |
| Light         | string | Ambient Light |
| Gyroscope     | string | Angular velocity around the X-axis, Y-axis and Z-axis |
| Accelerometer | string | Acceleration along the X-axis, Y-axis and Z-axis |
| Latitude      | string | GPS latitude  |
| Longitude     | string | GPS longitude |
| Timestamp     | int64  | Timestamp of sensor data sampling |