Proximity 19 Click

How does it work?

Proximity 19 Click is based on the RPR-0720, a miniature digital optical proximity sensor from ROHM Semiconductor that integrates an infrared VCSEL (IrVCSEL) and an IC with an I2C interface in a tiny package. This IC includes a built-in infrared receiver and VCSEL driver, enabling the sensor to detect human presence or objects by reflecting IrVCSEL light. The detection range of the proximity sensor is adjustable from approximately 1 to 15mm. Additionally, it is equipped with an ambient light canceling function, making it ideal for use in wearable and AR/VR devices, among other applications.

Proximity 19 Click uses a standard 2-wire I2C interface to communicate with the host MCU, supporting Standard mode with up to 400kHz of frequency clock. The I2C interface and registers allow for controlling various sensor functions, such as operating mode control, interrupt system management for interrupt signals available on INT pin, and adjusting offset and threshold values for proximity sensor data. This flexibility ensures precise and customizable operations tailored to specific application needs.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.

Specifications

Pinout diagram

This table shows how the pinout on Proximity 19 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	NC
	NC	2	RST	INT	15	INT	Interrupt
ID COMM	CS	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Proximity 19 Click electrical specifications

Software Support

We provide a library for the Proximity 19 Click as well as a demo application (example), developed using MIKROE compilers. The demo can run on all the main MIKROE development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on MIKROE github account.

Library Description

This library contains API for Proximity 19 Click driver.

Key functions

• proximity19_get_distance This function reads the distance measured by the sensor in millimeters by using the I2C serial interface.

• proximity19_set_ps_gain This function adjusts the gain of the sensor’s sensitivity to light reception.

• proximity19_set_period This function sets the desired data measurement period value.

Example Description

This example demonstrates the use of the Proximity 19 Click board™ by measuring and displaying the distance data.

void application_task ( void )  
 { 
     float distance = 0; 
     if ( PROXIMITY19_OK == proximity19_get_distance( &proximity19, &distance ) ) 
     { 
         log_printf( &logger, " Distance: %.2f [mm] rnn", distance ); 
     } 
     Delay_ms( 100 ); 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager (recommended), downloaded from our LibStock™ or found on MIKROE github account.

Other MIKROE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Proximity19

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. UART terminal is available in all MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.