ENS160-AHT21/ENS160_AHT21.ino at main · LukaGitH/ENS160-AHT21 · GitHub

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/***************************************************************************
  ENS160 - Digital Air Quality Sensor
  This example reads data from the ENS160 and AHT21 sensors in standard mode.

  Updated by Sciosense / 25-Nov-2021
***************************************************************************/

#include <Wire.h>
#include <Adafruit_AHTX0.h>    // https://github.com/adafruit/Adafruit_AHTX0
#include "ScioSense_ENS160.h"  // https://github.com/adafruit/ENS160_driver

// Pin Definitions
const int ArduinoLED = 13;

// Sensor Instances
Adafruit_AHTX0 aht;
ScioSense_ENS160 ens160(ENS160_I2CADDR_1); // ENS160 at 0x53 (AHT21 + ENS160 combo)

// Global Variables
int tempC;      // Temperature in Celsius
int humidity;   // Relative Humidity

void setup() {
  Serial.begin(115200);
  while (!Serial) {}

  pinMode(ArduinoLED, OUTPUT);
  digitalWrite(ArduinoLED, LOW);

  Serial.print("ENS160...");
  ens160.begin();
  Serial.println(ens160.available() ? "done." : "failed!");

  if (ens160.available()) {
    // Print ENS160 version info
    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!");
  }

  Serial.println("Adafruit AHT10/AHT20 demo!");
  if (!aht.begin()) {
    Serial.println("Could not find AHT? Check wiring");
    while (1) delay(10);
  }
  Serial.println("AHT10 or AHT20 found");
}

void loop() {
  if (ens160.available()) {
    ens160.set_envdata(tempC, humidity);
    ens160.measure(true);
    ens160.measureRaw(true);

    Serial.print("  AQI: ");
    Serial.print(ens160.getAQI());
    Serial.print("  ");

    Serial.print("TVOC: ");
    Serial.print(ens160.getTVOC());
    Serial.print("ppb  ");

    Serial.print("eCO2: ");
    Serial.print(ens160.geteCO2());
    Serial.print("ppm\t");

    // Uncomment below to read raw resistance values
    // 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");

    sensors_event_t humidity1, temp;
    aht.getEvent(&humidity1, &temp); // Populate temp and humidity objects with fresh data
    tempC = (temp.temperature);
    humidity = (humidity1.relative_humidity);

    Serial.print("Temp: ");
    Serial.print(tempC);
    Serial.print("  Humidity: ");
    Serial.println(humidity);
  }
}