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mikroSDK Library

Multimeter click

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Author: MikroElektronika Team

Last Updated: 2018-07-16

Category: Measurement

Downloaded: 207 times

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Multimeter click is a Click board designed to measure voltage, current, resistance, and capacitance properties of the components, connected to the input terminals.

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mikroSDK Library Blog

Multimeter click

Multimeter click

Native view of the Multimeter click board.

View full image
Multimeter click

Multimeter click

Front and back view of the Multimeter click board.

View full image

Library Description

The library contains calibration function, to be used on startup for more accurate readings, as well as
4 functions that measure Voltage, Current, Resistance, and Capacitance. Calibration should be performed at startup when all measurement leads are disconnected.

Key functions:

  • float multim_measureU() - This function measures voltage, and returns the value in millivolts.
  • float multim_measureR() - This function measures resistance, and returns the value in ohms.
  • float multim_measureC() - This function measures capacitance, and returns the value in nanofarads.
  • float multim_measureI() - This function measures current, and returns the value in milliamperes.

Example description

The application is composed of three sections:

  • The application is composed of three sections :
  • System Initialization - Initializes pin control, SPI peripheral and logger.
  • Application Initialization - Initializes the driver, and performs calibration. Application Task (Code snippet) - Outputs read values.
char text[20];
 float value = 0;
 value = multim_measureR();
 FloatToStr(value,text);
 mikrobus_logWrite("R = ",_LOG_TEXT);
 mikrobus_logWrite(text,_LOG_TEXT);
 mikrobus_logWrite(" Ohms",_LOG_LINE);

 value = multim_measureU();
 FloatToStr(value,text);
 mikrobus_logWrite("U = ",_LOG_TEXT);
 mikrobus_logWrite(text,_LOG_TEXT);
 mikrobus_logWrite(" mV",_LOG_LINE);


 value = multim_measureI();
 FloatToStr(value,text);
 mikrobus_logWrite("I = ",_LOG_TEXT);
 mikrobus_logWrite(text,_LOG_TEXT);
 mikrobus_logWrite(" mA",_LOG_LINE);


 value = multim_measureC();
 FloatToStr(value,text);
 mikrobus_logWrite("C = ",_LOG_TEXT);
 mikrobus_logWrite(text,_LOG_TEXT);
 mikrobus_logWrite(" nF",_LOG_LINE);

 mikrobus_logWrite("-------------------",_LOG_LINE);
 Delay_ms( 1000 );

Other MikroElektronika libraries used in the example:

  • Conversions
  • C_String 
  • UART

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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