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AirQuality4 Click

• CIC Prefix : AIR_QUALITY4
• Author : MikroE Team
• Verison : 1.0.0
• Date : Jan 2018

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Software Support

We provide a library for the AirQuality4 Click on our LibStock page, as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Library Description

Initializes and defines I2C bus driver and driver functions witch performs measurements of H2, TVOC, CO2 and EthOH concentracion in air. Check documentation for more details.

Key functions :

• void air_quality4_measureQuality(uint8_t *readAir) - Function writes 6 bytes CO2 data (2 bytes) and TVOC data (2 bytes) with CRC data for each other to buffer determined by pointer in parametar of function.
• void air_quality4_getCO2AndTVOC(uint16_t *value) - Function writes 2 bytes CO2 data and 2 bytes TVOC data without CRC data to buffer determined by pointer in parametar of function.
• void air_quality4_measureSignal(uint8_t *readAir) - Function writes 6 bytes H2 data (2 bytes) and EthOH - Ethanol data (2 bytes) with CRC data for each other to buffer determined by pointer in parametar of function.
• void air_quality4_getH2AndEthOH(uint16_t *value) - Function writes 2 bytes H2 data and 2 bytes EthOH data without CRC data to buffer determined by pointer in parametar of function.

Examples Description

• System Initialization - Initializes peripherals and pins.
• Application Initialization - Initializes click driver and gets ID data.
• Application Task - Performs measurements of air concentracion for H2, EthOH, CO2 and TVOC data. Results of measurement shows on USBUART.

void applicationTask()
{
    air_quality4_getH2AndEthOH(&data_buffer[0]);

    IntToStr(data_buffer[0], text);
    mikrobus_logWrite("H2 value is: ", _LOG_TEXT);
    mikrobus_logWrite(text, _LOG_LINE);

    IntToStr(data_buffer[1], text);
    mikrobus_logWrite("EthOH value is: ", _LOG_TEXT);
    mikrobus_logWrite(text, _LOG_LINE);

    air_quality4_setBaseline();
    
    air_quality4_getCO2AndTVOC(&data_buffer[0]);
    
    IntToStr(data_buffer[0], text);
    mikrobus_logWrite("CO2 value is: ", _LOG_TEXT);
    mikrobus_logWrite(text, _LOG_LINE);

    IntToStr(data_buffer[1], text);
    mikrobus_logWrite("TVOC value is: ", _LOG_TEXT);
    mikrobus_logWrite(text, _LOG_LINE);
    
    Delay_ms(1000);
}

The full application code, and ready to use projects can be found on our LibStock page.

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.

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