ndirco2

---

NDIR CO2 Click

NDIR CO2 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

---

Click Library

• Author : MikroE Team
• Date : Dec 2019.
• Type : I2C type

Software Support

Example Description

This application measures absolute CO2 concetration.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.NDIRCO2

Example Key Functions

• ndirco2_cfg_setup Config Object Initialization function.

void ndirco2_cfg_setup ( ndirco2_cfg_t *cfg );

• ndirco2_init Initialization function.

err_t ndirco2_init ( ndirco2_t *ctx, ndirco2_cfg_t *cfg );

• ndirco2_read_co2 CO2 Concentration Read function.

void ndirco2_read_co2 ( ndirco2_t *ctx, uint8_t set_check_mode, uint16_t *output_data );

• ndirco2_check_average_complete Average Complete Check function.

uint8_t ndirco2_check_average_complete ( ndirco2_t *ctx );

• ndirco2_set_mode Mode Set function.

void ndirco2_set_mode ( ndirco2_t *ctx, uint8_t select_mode );

Application Init

Initializes I2C driver and performs driver reset and determines number of averaging measurements.

void application_init ( void )
{
    log_cfg_t log_cfg;
    ndirco2_cfg_t cfg;

    /** 
     * 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.

    ndirco2_cfg_setup( &cfg );
    NDIRCO2_MAP_MIKROBUS( cfg, MIKROBUS_POSITION_NDIRCO2 );
    ndirco2_init( &ndirco2, &cfg );

    Delay_ms ( 300 );

    ndirco2_reset( &ndirco2 );
    ndirco2_write_register( &ndirco2, NDIRCO2_AVERAGING_COUNT_REG, 0x03 );
    ndirco2_set_mode( &ndirco2, NDIRCO2_CONTINUOUS_OP_MODE );
    log_printf( &logger, "NDIR CO2 is initialized \r\n" );
    Delay_ms ( 200 );
}

Application Task

Reads CO2 concentration data in ppm unit after each completed measurement. One measurement is finished after 300 ms, and period between two measurements is 2 seconds. Results of measurements logs on USBUART.

void application_task ( )
{
    uint16_t co2_data;

    ndirco2_read_co2( &ndirco2, NDIRCO2_CHECK_EACH_MEASURE, &co2_data );
    log_printf( &logger, "CO2 concentration is: %d ppm \r\n", co2_data );
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

---