Context

Environmental sensor telemetry data, detailed in the blog post, Getting Started with IoT Analytics on AWS, published on Towards Data Science.

Content

The data was generated from a series of three identical, custom-built, breadboard-based sensor arrays. Each array was connected to a Raspberry Pi devices. Each of the three IoT devices was placed in a physical location with varied environmental conditions.

| device            | environmental conditions                 |
|-------------------|------------------------------------------|
| 00:0f:00:70:91:0a | stable conditions, cooler and more humid |
| 1c:bf:ce:15:ec:4d | highly variable temperature and humidity |
| b8:27:eb:bf:9d:51 | stable conditions, warmer and dryer      |

Each IoT device collected a total of seven different readings from the four sensors on a regular interval. Sensor readings include temperature, humidity, carbon monoxide (CO), liquid petroleum gas (LPG), smoke, light, and motion. The data spans the period from 07/12/2020 00:00:00 UTC – 07/19/2020 23:59:59 UTC. There is a total of 405,184 rows of data.

The sensor readings, along with a unique device ID and timestamp, were published as a single message, using the ISO standard Message Queuing Telemetry Transport (MQTT) network protocol. Below is an example of an MQTT message payload.

{
  "data": {
    "co": 0.006104480269226063,
    "humidity": 55.099998474121094,
    "light": true,
    "lpg": 0.008895956948783413,
    "motion": false,
    "smoke": 0.023978358312270912,
    "temp": 31.799999237060547
  },
  "device_id": "6e:81:c9:d4:9e:58",
  "ts": 1594419195.292461
}

Columns

There are nine columns in the dataset.

| column   | description          | units      |
|----------|----------------------|------------|
| ts       | timestamp of event   | epoch      |
| device   | unique device name   | string     |
| co       | carbon monoxide      | ppm (%)    |
| humidity | humidity             | percentage |
| light    | light detected?      | boolean    |
| lpg      | liquid petroleum gas | ppm (%)    |
| motion   | motion detected?     | boolean    |
| smoke    | smoke                | ppm (%)    |
| temp     | temperature          | Fahrenheit |

Detail Image of Sensors