Adafruit ENS161 MOX Gas Sensor

Name: Adafruit ENS161 MOX Gas Sensor
Brand: Adafruit
SKU: 6431

Adafruit ENS161 MOX Gas Sensor — Adafruit — 6431

Availability

In stock

Metal-oxide (MOX) gas sensor breakout using the ScioSense ENS161 for indoor air-quality monitoring, reporting TVOC, eCO2, and AQI over I2C. Requires a separate temperature/humidity source for best accuracy compensation.

Logical pinout · physical placement not verified

One grouped source record is expanded into separate logical pads where unambiguous; physical placement is not implied.

VINheader / STEMMA QT
Power input to onboard regulator; power with same voltage as microcontroller logic
Type · PowerVoltage · 3-5V input
3Voheader
3.3V output from onboard regulator
Type · PowerVoltage · 3.3V output up to 100mA
GNDheader / STEMMA QT
Common ground for power and logic
Type · GroundVoltage · 0V
SDASDIheader / STEMMA QT
I2C data pin labelled SDI; also SPI serial data in
Type · I2C, SignalVoltage · 3-5V logic for I2C
SCLSCKheader / STEMMA QT
I2C clock pin labelled SCK; also SPI clock
Type · I2C, SPIVoltage · 3-5V logic for I2C
SDOheader
Address select pin for I2C address change; also SPI serial data out
Type · SignalVoltage · logic level
CSheader
SPI chip select input
Type · SPIVoltage · logic level
INTheader
Interrupt output, can be pulled low on sensor reading thresholds
Type · SignalVoltage · logic output

Pin	Position	Type	Function	Voltage
VIN	header / STEMMA QT	Power	Power input to onboard regulator; power with same voltage as microcontroller logic	3-5V input
3Vo	header	Power	3.3V output from onboard regulator	3.3V output up to 100mA
GND	header / STEMMA QT	Ground	Common ground for power and logic	0V
SDASDI	header / STEMMA QT	I2C, Signal	I2C data pin labelled SDI; also SPI serial data in	3-5V logic for I2C
SCLSCK	header / STEMMA QT	I2C, SPI	I2C clock pin labelled SCK; also SPI clock	3-5V logic for I2C
SDO	header	Signal	Address select pin for I2C address change; also SPI serial data out	logic level
CS	header	SPI	SPI chip select input	logic level
INT	header	Signal	Interrupt output, can be pulled low on sensor reading thresholds	logic output

Logical pinout · physical placement not verified

One grouped source record is expanded into separate logical pads where unambiguous; physical placement is not implied.

Pin details

8 connections

VIN
Power input to onboard regulator; power with same voltage as microcontroller logic
PowerVoltage · 3-5V input
header / STEMMA QT
3Vo
3.3V output from onboard regulator
PowerVoltage · 3.3V output up to 100mA
header
GND
Common ground for power and logic
GroundVoltage · 0V
header / STEMMA QT
SDASDI
I2C data pin labelled SDI; also SPI serial data in
I2C, SignalVoltage · 3-5V logic for I2C
header / STEMMA QT
SCLSCK
I2C clock pin labelled SCK; also SPI clock
I2C, SPIVoltage · 3-5V logic for I2C
header / STEMMA QT
SDO
Address select pin for I2C address change; also SPI serial data out
SignalVoltage · logic level
header
CS
SPI chip select input
SPIVoltage · logic level
header
INT
Interrupt output, can be pulled low on sensor reading thresholds
SignalVoltage · logic output
header

Start wiring

I2C · Analog · UART · 3.3 – 5 V · Breakout

Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…

Module pins: VIN, 3Vo, GND, SDA / SDI, SCL / SCK, SDO, CS. Schematik maps them to your board in the app.

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