SCD41 CO₂ Sensor with a Raspberry Pi Pico

// SCD41 CO₂ Sensor on Raspberry Pi Pico: wiring and a free simulation at https://www.tinkered.ai/components/scd41-co2-sensor/raspberry-pi-pico
#include <Wire.h>
#include <SensirionI2cScd4x.h>     // library 1.x: SensirionI2c, lower-case c

SensirionI2cScd4x scd4x;

void setup() {
  Serial.begin(9600);
  Wire.begin();
  scd4x.begin(Wire, SCD41_I2C_ADDR_62);
  scd4x.stopPeriodicMeasurement();     // clean state
  scd4x.startPeriodicMeasurement();    // ~5 s cadence
}

void loop() {
  uint16_t co2; float temp, hum;
  bool ready = false;
  scd4x.getDataReadyStatus(ready);
  if (ready && scd4x.readMeasurement(co2, temp, hum) == 0 && co2 != 0) {
    Serial.print("CO2: "); Serial.print(co2); Serial.print(" ppm  ");
    Serial.print(temp); Serial.print(" C  ");
    Serial.print(hum);  Serial.println(" %");
  }
  delay(1000);
}