How to access the CCI IoT data

We have several IoT sensors, including AirGradient indoor and outdoor air quality sensors, which log data every 30 seconds via MQTT and are available to students and staff who want to access this data, and power reporting for classroom lecterns.

MQTT Server

The MQTT server sits at mqtt.cci.arts.ac.uk on port 1883.

The read-only student username and password can be provided by asking on Slack in the #technical channel.

Air Quality Data

Data Format

The data format is airgradient/readings/(sensor), the sensors is the MAC address and serial number of that location, the locations are:

Greencoat

• GB_G03 – Classroom = 0cb815082660
• GB_G04 – Classroom = 4022d8f9b4d8
• GB_G05 – Dark Lab = d83bda1c51e0
• GB_G10 – Prototyping Lab = 34b7da9f6b9c
• GB_G11 – Robotics Lab = d83bda1b8e2c

Peckham Road

• PR_B401A – Digital Fabrication Lab = 34b7da9fdf28
• PR_B501D – Classroom = dc5475bb845c
• PR_B501E – Classroom = b48a0a613900
• PR_B501F – Classroom = dc5475bcc430
• PR_B503 – Physical Computing Lab = d83bda1c47f8

High Holborn

• HH_302 – Classroom = dc5475bce770
• HH_308 – Classroom = dc5475bacb84

Millbank (Chelsea College of Arts)

• MB_AG06 - Lecture Theatre
  1. a842e3285cf8
  2. 64b70835462c (tbc)
  3. c049ef0c92fc
• MB_ALG02 - Interior Design Studio
  1. c049ef0c9514
  2. 90380c6dc6c8
  3. a842e3283e84
  4. a842e3285cf0
• MB_BLG19B = c049ef0c8648
• MB_BLG19C = 0cb815081120
• MB_BLG19D = 64b70834d3b0
• MB_BLG20 = 64b70834fa14
• MB_BLG20A = 64b7083502c8

Example data:

{
  "firmware":"9.3.0",
  "wifi":-39,
  "ssid":"UAL-IoT",
  "light":4095,
  "hwVersion":8,
  "rco2":409,
  "atmp":31.2,
  "rhum":31.55,
  "tvoc_index":164,
  "nox_index":1,
  "pm003_count":544,
  "pm01":2,
  "pm02":2,
  "pm10":2,
  "boot":1537,
  "wdog":1
}

What are these values?

• pm003_count: PM0.3 particle count
• pm01: PM1 µg/m3
• pm02: PM2.5 µg/m3
• pm10: PM10 µg/m3
• nox_index: NOx Index (Ind41)
• tvoc_index: TVOC Index (Ind40)
• rhum: Relative Humidity %
• atmp: Temprature ºC
• rco2: CO2 PPM

Subscribing to the data

In order to view the data in something like a GUI you need to subscribe with a wildcard such as airgradient/# the default subscription for apps like MQTT Explorer shown below is just # however the permissions of the student account only allow you to view the data inside airgradient, sensors.

If you wanted just 1 sensor, you could subscribe to airgradient/sensors/(sensor) where sensor is one of the sensors listed in the sections above.

Power Monitoring