How To: CO₂ Module

With CO₂ Module you can easily measure the concentration of carbon dioxide.

It is a low-power module that can be battery-powered for a long period. Remember that the device can need a few days before the best results are achieved.

The module uses infrared light for measurements.

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In this example, CO₂ levels will be measured and sent to the computer over USB every 2 minutes.

CO₂ Over Radio Code Example

#include <application.h>

#define CO2_UPDATE_INTERVAL (2 * 60 * 1000)

void co2_event_handler(twr_module_co2_event_t event, void *event_param)
{
    (void) event_param;
    float value;

    if (event == TWR_MODULE_CO2_EVENT_UPDATE)
    {
        if (twr_module_co2_get_concentration_ppm(&value))
        {
            twr_radio_pub_co2(&value);
        }
    }
}

void application_init(void)
{
    twr_module_co2_init();
    twr_module_co2_set_update_interval(CO2_UPDATE_INTERVAL);
    twr_module_co2_set_event_handler(co2_event_handler, NULL);
}

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