An environmental sensor built by our students, reporting from the festival in real time.
Right now
Conditions
Connecting to the sensor…
—Temperature
—Humidity
—Pressure
—IAQ
—IAQ accuracy
—CO₂ equivalent
—bVOC equivalent
History
Over time
No readings yetData will appear here as the sensor reports.
Reference
What the numbers mean
IAQ — indoor air quality
0–50Excellent
51–100Good
101–150Lightly polluted
151–200Moderately polluted
201–250Heavily polluted
251–350Severely polluted
351–500Extremely polluted
IAQ accuracy
How far the gas sensor has got through its self-calibration. The IAQ, CO₂ and bVOC figures only become meaningful once this reaches 1.
0Algorithm not yet calibrated — the reading is not reliable
1Low accuracy
2Medium accuracy
3High accuracy
How it works
From the sensor to this page
🌡️
MeasureA BME680 sensor connected to an ESP32 measures temperature, humidity, pressure and gas resistance. Bosch BSEC2 processes these measurements to estimate indoor air quality (IAQ), CO₂ equivalent and bVOC equivalent.
📶
PublishThe ESP32 joins the WiFi and publishes all seven values as one JSON message to an MQTT broker, over an encrypted connection.
🗄️
CollectOur server subscribes to the broker and keeps a rolling seven days of readings.
📈
ShowThis page asks the server for the data and draws the graph you see above.
