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Library

Proximity 3 Click

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Author: MikroElektronika Team

Last Updated: 2017-11-10

Category: Measurement

Downloaded: 231 times

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Proximity 3 click is an intelligent proximity and light sensing device, which features the VCNL4100 sensor from Vishay - high sensitivity long distance proximity sensor (PS), ambient light sensor (ALS) and 940 nm IRED, all in one small package.

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Download

Download Library [1.84MB]

Version 1.0.0.0

DOWNLOAD LINK RELATED COMPILER CONTAINS
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Library Blog

Proximity 3 Click

Proximity 3 Click

Front and back view of the Proximity 3 click board.

View full image

Library Description

This library contains a set of functions, necessary to work with the Proximity 3 click.

Key functions

uint16_t prox3_readALS() - Reads value from ALS register

uint16_t prox3_readPS() - Reads value from PS register

uint16_t prox3_getDistance() - Calculating distance

uint16_t prox3_getIlluminance() - Calculating illuminance

Examples Description

This is a simple demonstration of sensor functionality, where the user can read the distance and illuminance data from Proximity 3 click. Distance and illuminance values are sent via UART.

The application is composed of three sections:

  • System Initialization - I2C and UART module initialization
  • Application Initialization - Sends HAL pointers, and initializes the VCNL4200
  • Application Task - Sequencial reading of the distance, proximity and ambient light data from the sensor and logging it to UART, every second
void applicationTask()
{
// DISTANCE READ AND CONVERT VALUE TO STRING
    resultPS = prox3_getDistance();
    IntToStr( resultPS, txt1 );
    
// WRITES INFORMATION TO UART
    UART1_Write_Text( "Proximity: ~ " );
    UART1_Write_Text( txt1 );
    UART1_Write_Text( " cmrn" );
    
// AMBIENT LIGHT READ AND CONVERT VALUE TO STRING
    resultALS = prox3_getIlluminance();
    IntToStr( resultALS, txt2 );

// WRITES INFORMATION TO UART
    UART1_Write_Text( "Ambient Light: " );
    UART1_Write_Text( txt2 );
    UART1_Write_Text( " luxrn" );
    
    Delay_ms(1000);
}

Other mikroE Libraries used in the example:

  • I2C
  • UART
  • Conversions

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.

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