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mikroSDK Library

CO click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2019-01-29

Category: Gas

Downloaded: 2415 times

Followed by: 2 users

License: MIT license  

This example demonstrates usage of the CO click board in mikroBUS form factor. This CO sensor is suitable for gas detecting equipment for Carbon Monoxide (CO). LCD shows PPM value of Carbon Monoxide (CO) concentration.

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mikroSDK Library Blog

CO click board

CO click board

Front and back side appearance of the CO click Board.

View full image

Library Description

The library covers all the necessary functions to control CO Click board. CO click communicates with the target board via analog ( AN ) pin. This library contains drivers for read ADC value of MQ-7 sensor.

Key functions:

  • float co_voltageConversion( uint32_t adcValue, float vRef ) - Convert the voltage function.
  • float co_getRatio( uint32_t adcValue, float vRef ) - Get the sensor ratio function.
  • float co_getSensorResistance( uint32_t adcValue, float vRef ) - Get the sensor resistance.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes GPIO and LOG structures, sets AN pin as input.
  • Application Initialization - Initialization driver enables GPIO and ADC, also starts write log.
  • Application Task - (code snippet) This is a example which demonstrates the use of CO Click board. CO Click reads ADC value. Results are being sent to the Usart Terminal where you can track their changes. All data logs on usb uart changes for every 1 sec.
void applicationTask()
{      
    valueADC = co_readADC(); 
    Delay_100ms(); 
    
    IntToStr( valueADC, logText );
    mikrobus_logWrite( " ADC value: ", _LOG_TEXT );
    mikrobus_logWrite( logText, _LOG_LINE );
    mikrobus_logWrite( "-------------------", _LOG_LINE );
    Delay_1sec();
}


Additional Functions :

  • void co_adcInit() - Function ADC initialization.
  • uint32_t co_readADC() - Function read ADC value.

Other mikroE Libraries used in the example:

  • ADC
  • UART
  • Conversions

Additional notes and information

Depending on the development board you are using, you may need USB UART clickUSB 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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