Datasheet

Datasheet:

AIR QUALITY SENSOR FOR RASPBERRY PI

V1C - 2021-08-01

This board uses the CCS811 VOC sensor IC

and a TMP235 temperature sensor. It also has

a rudimentary display and a buzzer.

The board uses a bi-directional UART

interface to communicate with the Pi.

The board is designed for use with the

Raspberry Pi 400, but also works with other

models of Raspberry Pi using the jumper wires

included in the kit.

Electrical

Units

Absolute maximum supply

voltage

3.6 V

Minimum supply voltage 3.0 V

Typical current consumption 40 mA

Maximum current

consumption

80 mA

Sensor Characteristics

Units

eCO2 minimum reading 400 ppm

eCO2 maximum reading 4095 ppm

eCO2 resolution 1 ppm

eCO2 accuracy unspecified

Temperature minimum

reading

-10 deg. C

Temperature max reading 100 deg. C

Temperature accuracy +/- 2 deg. C

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Datasheet: AIR QUALITY SENSOR FOR RASPBERRY PI V1C - 2021-08-01 This board uses the CCS811 VOC sensor IC and a TMP235 temperature sensor. It also has a rudimentary display and a buzzer. The board uses a bi-directional UART interface to communicate with the Pi. The board is designed for use with the Raspberry Pi 400, but also works with other models of Raspberry Pi using the jumper wires included in the kit. Electrical Sensor Characteristics Units Absolute maximum supply voltage 3.
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Serial Protocol All communication is at 9600 baud 8N1. Commands are a single letter with no terminating character or line feed required. Any extraneous command characters are ignored by the board. Some commands are followed by a response from the board within a few milliseconds. The responses are variable length and terminated with a \n character. Command Response t t=23.45\n returns the temperature in degrees C as a float c c=400\n returns the eCOS level in ppm as an int b no response turn the bu
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Schematic Page 3
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Mechanical Actual size Page 4