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MiCS-5524 Air Quality
Smells change, cannot name ppm
Page 52 reads the MiCS-5524 analog output on ADC GPIO1 and turns it into a 0β100 relative score with a three-step grade.
It is a broad-band metal-oxide sensor: sensitive to CO, ethanol, hydrogen, ammonia and methane, but it cannot tell which one. Excellent at noticing that air got worse, wrong tool for measuring concentration.
Screen
On-screen interface
A recreation of this page on the 2.41-inch AMOLED display (600 Γ 450). Actual interaction and layout follow the latest firmware.
Air72/100 Β· fair
0 good β 72 β 100 poor
GasesCO / ethanol / Hβ / NHβ / CHβ
Heater~26 mA Β· burn-in done
Health86
Cannot name the gas β not a CO alarm
Screen Β· Page 52
May differ from the actual interface; the screen of the real device is the final reference.
Highlights
Key capabilities
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Relative score
0β100 with three grades.
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Heater control
24 h burn-in on first use.
π
Trend
Watch the last stretch of readings.
π©Ί
Health score
Uncalibrated ADC or frozen readings are flagged.
Specifications
Technical specs
PinADC GPIO 1
OutputAnalog 0β3.3 V
Supply3.3 V (~26 mA heater)
Firmware pagePage 52
Use Cases
Typical scenarios
Ventilation nudge
Tell you to open a window in a kitchen or new car.
Alcohol hint
Very sensitive to ethanol β a rough breath check.
Commands
Related commands
page 52 Open the MiCS-5524 page mics Read the air-quality score
β Boundaries & notes
- Cannot identify the gas β do not use it as a CO alarm.
- Needs 24 h burn-in before readings settle.
- Temperature and humidity shift the baseline; recalibrate periodically.
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