examples.md

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simple/arduino

Example 1 - Continuous Mode

The first example demonstrates how to initialize the sensor over I²C to measure CO₂ data in Continuous Mode and print it out over serial. Open the example by navigating to File > Examples > XENSIV PAS CO2 > continuous-mode. After opening the example, select your Board and Port (in our case, SparkFun RedBoard IoT), and click "Upload". Open the serial terminal with the baud set to 9600 and you should see the same as the screenshot below:

[{ width="400"}](./assets/images/Early_Measurement-Serial_Print.jpg "Click to enlarge")

Example 2 - Boost Regulator Early Notification

The second example follows the assembly step in the Hardware Assembly section tying the PAS CO2's INT pin to the boost regulator's EN pin to control power for the regulator during measurements. This is a custom example we wrote so you'll need to get it from the GitHub Repository or by copying the code below into a blank sketch:

??? "Early Measurement Example"

```
 --8<-- "https://raw.githubusercontent.com/sparkfun/SparkFun_Qwiic_CO2_Sensor_XENSIV_PAS/main/Firmware/Examples/Example01_EarlyMeasurementStartInterrupt/Example01_EarlyMeasurementStartInterrupt.ino"
```

Select your board and port and upload the example. After the uploade completes, open the serial terminal with the baud set to 115200 and you should see a printout similar to the one below with CO₂ measurements printing every ten seconds:

[{ width="400"}](./assets/images/Early_Measurement-Serial_Print.jpg "Click to enlarge")