• CIC Prefix : AIRQ5
• Author : Katarina Perendic
• Verison : 1.0.0
• Date : apr 2018.

We provide a library for the AirQuality5 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

The library initializes and defines the I2C bus driver and drivers that offer a choice for writing data in registers and reading data from registers. The library includes functions for full initialization chip, reading 3 sensor (CO, NH3 and NO2 data).
User can check the state of the RDY pin indicating that the data is ready for reading.

Key functions :

• void airq5_setConfiguration(uint16_t config) - Functions for configuration
• uint16_t airq5_readSensorData(uint16_t channel_data) - Functions for read sensor data

Examples Description

The application is composed of three sections :

• System Initialization - Initializes I2C module and sets INT pin as INPUT
• Application Initialization - Initializes driver init and configuration chip
• Application Task - (code snippet) - Reads the values of CO, NH3 and NO2 sensor and logs data on USBUART every 500ms.

void applicationTask()
{
    NO2_sensorData = airq5_readSensorData(_AIRQ5_DATA_CHANNEL_NO2);
    NH3_sensorData = airq5_readSensorData(_AIRQ5_DATA_CHANNEL_NH3);
    CO_sensorData = airq5_readSensorData(_AIRQ5_DATA_CHANNEL_CO);
      
    IntToStr(NO2_sensorData, dataText);
    mikrobus_logWrite(" NO2 data: ", _LOG_TEXT);
    mikrobus_logWrite(dataText, _LOG_LINE);

    IntToStr(NH3_sensorData, dataText);
    mikrobus_logWrite(" NH3 data: ", _LOG_TEXT);
    mikrobus_logWrite(dataText, _LOG_LINE);

    IntToStr(CO_sensorData, dataText);
    mikrobus_logWrite(" CO data: ", _LOG_TEXT);
    mikrobus_logWrite(dataText, _LOG_LINE);

    mikrobus_logWrite(" -------- ", _LOG_LINE);
    Delay_ms( 500 );
}

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

Other mikroE Libraries used in the example:

• Conversions
• I2C
• UART

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.