Using the ENS160 gas sensor with Arduino involves wiring up the sensor to your Arduino-compatible microcontroller, installing the ENS160 library and running the provided example code.
Wiring
Wire as shown for a 5V board like an Uno. If you are using a 3V board, like an Adafruit Feather, wire the board's 3V pin to the ENS160 VIN.
Here is an Adafruit Metro wired up to the ENS160 using the STEMMA QT connector:
-
Board 5V to sensor VIN (red wire)
-
Board GND to sensor GND (black wire)
-
Board SCL to sensor SCL (yellow wire)
- Board SDA to sensor SDA (blue wire)
Here is an Adafruit Metro wired up using a solderless breadboard:
-
Board 5V to sensor VIN (red wire)
-
Board GND to sensor GND (black wire)
-
Board SCL to sensor SCL (yellow wire)
- Board SDA to sensor SDA (blue wire)
Library Installation
You can install the ENS160 - Adafruit Fork library for Arduino using the Library Manager in the Arduino IDE.
Click the Manage Libraries ... menu item, search for Adafruit ENS160, and select the ENS160 - Adafruit Fork library:
No additional libraries are required.
// SPDX-FileCopyrightText: 2021 Sciosense
//
// SPDX-License-Identifier: MIT
/***************************************************************************
ENS161 - Digital Air Quality Sensor
This is an example for ENS161 basic reading in standard mode
Updated by Sciosense / 25-Nov-2021
***************************************************************************/
#include <Wire.h>
int ArduinoLED = 13;
#include "ScioSense_ENS160.h" // ENS160 library
ScioSense_ENS160 ens160(ENS160_I2CADDR_1);
/*--------------------------------------------------------------------------
SETUP function
initiate sensor
--------------------------------------------------------------------------*/
void setup() {
Serial.begin(115200);
while (!Serial) {}
//Switch on LED for init
pinMode(ArduinoLED, OUTPUT);
digitalWrite(ArduinoLED, LOW);
Serial.println("------------------------------------------------------------");
Serial.println("ENS161 - Digital air quality sensor");
Serial.println();
Serial.println("Sensor readout in standard mode");
Serial.println();
Serial.println("------------------------------------------------------------");
delay(1000);
Serial.print("ENS161...");
ens160.begin();
Serial.println(ens160.available() ? "done." : "failed!");
if (ens160.available()) {
// Print ENS160 versions
Serial.print("\tRev: "); Serial.print(ens160.getMajorRev());
Serial.print("."); Serial.print(ens160.getMinorRev());
Serial.print("."); Serial.println(ens160.getBuild());
Serial.print("\tStandard mode ");
Serial.println(ens160.setMode(ENS160_OPMODE_STD) ? "done." : "failed!");
}
}
/*--------------------------------------------------------------------------
MAIN LOOP FUNCTION
Cylce every 1000ms and perform measurement
--------------------------------------------------------------------------*/
void loop() {
if (ens160.available()) {
ens160.measure(true);
ens160.measureRaw(true);
Serial.print("AQI: ");Serial.print(ens160.getAQI());Serial.print("\t");
Serial.print("TVOC: ");Serial.print(ens160.getTVOC());Serial.print("ppb\t");
Serial.print("eCO2: ");Serial.print(ens160.geteCO2());Serial.print("ppm\t");
Serial.print("R HP0: ");Serial.print(ens160.getHP0());Serial.print("Ohm\t");
Serial.print("R HP1: ");Serial.print(ens160.getHP1());Serial.print("Ohm\t");
Serial.print("R HP2: ");Serial.print(ens160.getHP2());Serial.print("Ohm\t");
Serial.print("R HP3: ");Serial.print(ens160.getHP3());Serial.println("Ohm");
}
delay(1000);
}
Upload the sketch to your board and open up the Serial Monitor (Tools -> Serial Monitor) at 115200 baud. You should see that the sketch has found your connected I2C ENS160 gas sensor. Then, sensor readings for AQI, TVOC, eCO2 and the raw resistance values of the four hot plates in the sensor are printed to the Serial Monitor every second.
Page last edited December 02, 2025
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