Library Description

The library carries all necessary functions to have complete control over Air quality 3 click.

Key functions

void airq3_getCO2andTVOC( uint16_t *algData ) - Read Co2 and TVOC values.

void airq3_setMeasurementMode( uint8_t mode ) - Set measurement mode.

void airq3_init() - Default module initialization must be called before module usage.

Examples Description

The demo application is composed of three sections:

• System Initialization - Initializes I2C module, set CS and RST pin as OUTPUT and INT pin as INPUT.
• Application Initialization - Initializes Driver, and module with default settings and also setup measurement mode.
• Application Task - (code snippet) - This function read CO2 and TVOC value in the air and LOG information to UART. The operation is repeated each one second.

void applicationTask()
{
 airq3_getCO2andTVOC(&AIRQ3_Data[0]);

 ByteToStr(AIRQ3_Data[0],text);
 mikrobus_logWrite("CO2 value : ",_LOG_TEXT);
 mikrobus_logWrite(text,_LOG_TEXT);
 mikrobus_logWrite(" ppm",_LOG_LINE);

 ByteToStr(AIRQ3_Data[1],text);
 mikrobus_logWrite("TVOC value : ",_LOG_TEXT);
 mikrobus_logWrite(text,_LOG_TEXT);
 mikrobus_logWrite(" ppb",_LOG_LINE);

 Delay_1sec();
}

mikroE Libraries used in the example:

• UART
• I2C

Additional notes and information

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.