PROXIMITY 13 CLICK
PID: MIKROE‐3991
Weight: 17 g
Proximity 13 Click based on SI1153-AB09-GMR IC from Silicon Labs that can
be used as an proximity, and gesture detector with I2C digital interface and
programmable-event interrupt output. The host can send command the
Proximity 13 click to initiate on-demand proximity measurements. The host
can also place the click board in an autonomous operational state where it
performs measurements at set intervals and interrupts the host either after
each measurement is completed or whenever the sample is larger/smaller
than a set threshold value or exits/enters a set threshold window.
Proximity 13 Click board™ is supported by a mikroSDK compliant library,
which includes functions that simplify software development. This Click
board™ comes as a fully tested product, ready to be used on a system
equipped with the mikroBUS™ socket.
How does it work?
Proximity 13 click features touchless sensor IC that includes dual 23-bit analog-to-digital
converters, an integrated high-sensitivity array of visible and infrared photodiodes, a digital
signal processor, and three integrated LED drivers with programmable drive levels. The
photodiode response and associated digital conversion circuitry provide excellent immunity to
artificial light flicker noise and natural light flutter noise.
By default, the measurement parameters are optimized for indoor ambient light levels, where it is
possible to detect low light levels. For operation under direct sunlight, the ADC can be
programmed to operate in a high signal operation so that it is possible to measure direct sunlight
without overflowing.
The Proximity 13 click is capable of measuring visible and infrared light. However, the visible
photodiode is also influenced by infrared light. The measurement of illuminance requires the
same spectral response as the human eye. If an accurate lux measurement is desired, the extra IR
response of the visible-light photodiode must be compensated. Therefore, to allow the host to
make corrections to the infrared light’s influence, SI1153-AB09-GMR reports the infrared light
measurement on a separate channel. The separate visible and IR photodiodes lend themselves to
a variety of algorithmic solutions. The host can then take these two measurements and run an
algorithm to derive an equivalent lux level as perceived by a human eye. Having the IR
correction algorithm running in the host allows for the most flexibility in adjusting for systemdependent variables. For example, if the glass used in the system blocks visible light more than
infrared light, the IR correction needs to be adjusted.
Over distances of less than 50 cm, the dual-port active reflection proximity detector has
significant advantages over single-port, motion-based infrared systems, which are only good for
triggered events. Motion-based infrared detectors identify objects within proximity, but only if
they are moving. Single-port motion-based infrared systems are ambiguous about stationary
objects even if they are within the proximity field. The Proximity 13 click can reliably detect an
object entering or exiting a specified proximity field, even if the object is not moving or is
moving very slowly. However, beyond about 30–50 cm, even with good optical isolation, singleport signal processing may be required due to static reflections from nearby objects, such as
tables, walls, etc. If motion detection is acceptable, the SI1153-AB09-GMR can achieve ranges
of up to 50 cm, through a single product window.
Since the three infrared LEDs are placed in an L-shaped configuration, it is possible to
triangulate an object within the three-dimensional proximity field. Thus, a touchless user
interface can be implemented with the aid of host software.
Specifications
Type
Proximity
Applications
Wearables, Handsets, Display backlight control, Consumer electronics
On‐board
modules
SI1153‐AB09‐GMR
Key Features
Proximity detector, three independet LED drivers, operates in direct sunlight with on
die 940 nm pasband filter, internal and external wake support
Interface
GPIO,I2C
Compatibility
mikroBUS
Click board size S (28.6 x 25.4 mm)
Input Voltage
3.3V
Pinout diagram
This table shows how the pinout on Proximity 13 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
NC
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 +5V
Power supply
Ground
GND
8 GND
GND
9
Ground
GND
Onboard settings and indicators
Label
Name
PWR
LED GREEN ‐
IR1, IR2, IR3 IR LED
Default
‐
Description
Power LED Indicator
Infrared LED
Software Support
We provide a library for the Proximity 13 Click on our LibStock page, as well as a demo
application (example), developed using MikroElektronika compilers. The demo can run on all
the main MikroElektronika development boards.
Library Description
Librari provides functions for reading and writing to registers. You have functions for setting
parameters, sending commands and configurating device channels. There is function for reading
all channels if they are enabled.
Key functions:
uint8_t proximity13_generic_read ( uint8_t reg_adr ) ‐ Generic read function
void proximity13_generic_write ( uint8_t reg_adr, uint8_t write_data ) ‐
from registers
Generic write function to registers
uint8_t proximity13_get_int_pin_status ( void ) ‐ Function for reading status of
int pin
uint8_t proximity13_send_command ( uint8_t cmd_val ) ‐ Function for sending
commands
uint8_t proximity13_set_parameter ( uint8_t param, uint8_t cmd_val ) ‐
Function for setting parameters
uint8_t porximity13_config_channel ( uint8_t chn_num, proximity13_cfg_t
cfg_val ) ‐ Function for configurating specific channel
void proximity13_read_channels ( proximity13_chn_val_t *chn_val ) ‐
Fucnction for reading from all enabled channels
Examples description
The application is composed of three sections :
System Initialization ‐ Initialization of I2C module and setting int pin to output
Application Initialization ‐ Check id status, configures device and sends command for
measurement
Application Task ‐ Appliction measures values very 100ms and converts it to 24bit
void application_task ( )
{
proximity13_chn_val_t chn_val;
char txt[ 30 ];
proximity13_read_channels( &chn_val );
WordToStr( chn_val.channel_1, txt );
mikrobus_logWrite( "Data :", _LOG_TEXT );
mikrobus_logWrite( txt, _LOG_LINE );
Delay_ms ( 100 );
}
The full application code, and ready to use projects can be found on our LibStock page.
Other mikroE Libraries used in the example:
I2C
UART
Conversions
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. The terminal available in all MikroElektronika compilers,
or any other terminal application of your choice, can be used to read the message.
mikroSDK
This Click board™ is supported with mikroSDK - MikroElektronika 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.
https://www.mikroe.com/proximity‐13‐click/2‐20‐20
