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CO2 3 click

CO2 3 Click is a compact add-on board that allows for precise and reliable indoor air quality measurements. This board features XENSIV™ PASCO2V01BUMA1, a highly accurate CO2 sensor module from Infineon Technologies that uses photoacoustic spectroscopy technology to measure indoor air quality. The module comprises a gas measuring cell, an IR emitter, a microphone, and a microcontroller for data processing. Its key components are developed in-house, ensuring the highest quality and performance. Other major characteristics include high accuracy, low power consumption, and versatile configuration options.

click Product page

Click library

  • Author : Nenad Filipovic
  • Date : Feb 2023.
  • Type : I2C type

Software Support

We provide a library for the CO2 3 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for CO2 3 Click driver.

Standard key functions :

  • co23_cfg_setup Config Object Initialization function.
void co23_cfg_setup ( co23_cfg_t *cfg );
  • co23_init Initialization function.
err_t co23_init ( co23_t *ctx, co23_cfg_t *cfg );
  • co23_default_cfg Click Default Configuration function.
err_t co23_default_cfg ( co23_t *ctx );

Example key functions :

  • co23_get_co2_ppm CO2 3 get CO2 concentration function.
err_t co23_get_co2_ppm ( co23_t *ctx, uint16_t *co2_ppm );
  • co23_set_meas_cfg CO2 3 set measurement configuration function.
err_t co23_set_meas_cfg ( co23_t *ctx, co23_meas_cfg_t meas_cfg );
  • co23_set_pressure_ref CO2 3 set reference pressure function.
err_t co23_set_pressure_ref ( co23_t *ctx, uint16_t pressure_mbar );

Example Description

This library contains API for CO2 3 Click driver. This driver provides the functions for sensor configuration and reading the CO2 gas concentration in the air.

The demo application is composed of two sections :

Application Init

The initialization of I2C or UART module, log UART, and additional pins. After the driver init, the app executes a default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;    /**< Logger config object. */
    co23_cfg_t co23_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    co23_cfg_setup( &co23_cfg );
    CO23_MAP_MIKROBUS( co23_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == co23_init( &co23, &co23_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    Delay_ms ( 100 );
    
    if ( CO23_ERROR == co23_default_cfg ( &co23 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    Delay_ms ( 100 );
    
    log_info( &logger, " Application Task " );
    log_printf( &logger, "-----------------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

This example demonstrates the use of the CO2 3 Click board™. The device starts a single measurement sequence, measures and display air CO2 gas concentration (ppm). Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{     
    co23_meas_cfg_t meas_cfg;
    meas_cfg.op_mode = CO23_OP_MODE_SINGLE;
    co23_set_meas_cfg( &co23, meas_cfg );
    Delay_ms ( 1000 );
    
    uint16_t co2_ppm = 0;
    co23_get_co2_ppm( &co23, &co2_ppm );
    log_printf( &logger, " CO2: %d ppm\r\n", co2_ppm );
    log_printf( &logger, "-----------------------\r\n" );
    Delay_ms ( 100 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.CO23

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.