Our digital barometric pressure sensor is not just a device; it's a gateway to unlocking a world of possibilities. Accurate, reliable, and versatile – it's the key to gaining a deeper understanding of your environment.
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Hardware Overview
How does it work?
Barometer 12 Click is based on the ICP-10125, a high-accuracy, low-power, 10-atm waterproof barometric pressure and temperature sensor from TDK InvenSense. It is a very accurate sensor and can measure pressure differences with an accuracy of ±1 Pa, enabling altitude measurement differentials as small as 8.5 cm, less than the height of a single stair step. In addition to high accuracy, this sensor consumes only 1.3μA at 1Hz, making it ideal for battery-powered applications.
According to the datasheet table, the sensor performs best with the recommended temperature and pressure range. The sensor works at 1.8V, which it gets from the AP2112, a CMOS LDO regulator from Diodes Incorporated. Barometer 12 Click uses a standard 2-Wire I2C interface to communicate with the host MCU, supporting clock frequency up to 400KHz. To allow safe sensor operation on both 5V and 3.3V voltage logic, this Click board™ features the PCA9306, a
dual bidirectional I2C bus and SMBus voltage-level translator from Texas Instruments. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VIO SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
Arduino UNO is a versatile microcontroller board built around the ATmega328P chip. It offers extensive connectivity options for various projects, featuring 14 digital input/output pins, six of which are PWM-capable, along with six analog inputs. Its core components include a 16MHz ceramic resonator, a USB connection, a power jack, an
ICSP header, and a reset button, providing everything necessary to power and program the board. The Uno is ready to go, whether connected to a computer via USB or powered by an AC-to-DC adapter or battery. As the first USB Arduino board, it serves as the benchmark for the Arduino platform, with "Uno" symbolizing its status as the
first in a series. This name choice, meaning "one" in Italian, commemorates the launch of Arduino Software (IDE) 1.0. Initially introduced alongside version 1.0 of the Arduino Software (IDE), the Uno has since become the foundational model for subsequent Arduino releases, embodying the platform's evolution.
Microcontroller Overview
MCU Card / MCU
![default](https://dbp-cdn.mikroe.com/catalog/mcus/resources/ATmega328P.jpeg)
Architecture
AVR
MCU Memory (KB)
32
Silicon Vendor
Microchip
Pin count
28
RAM (Bytes)
2048
You complete me!
Accessories
Click Shield for Arduino UNO has two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the Arduino UNO board without effort. The Arduino Uno, a microcontroller board based on the ATmega328P, provides an affordable and flexible way for users to try out new concepts and build prototypes with the ATmega328P microcontroller from various combinations of performance, power consumption, and features. The Arduino Uno has 14 digital input/output pins (of which six can be used as PWM outputs), six analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and reset button. Most of the ATmega328P microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the Arduino UNO board with our Click Shield for Arduino UNO, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
![Barometer 12 Click Schematic schematic](https://dbp-cdn.mikroe.com/catalog/click-boards/resources/1ee808d9-3cbb-611e-bd2f-02420a00024a/Barometer-12-click-v100-Schematic-1.png)
Step by step
Project assembly
Track your results in real time
Application Output
After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.
![Application Output Step 1](https://dbp-cdn.mikroe.com/cms/shared-resources/1eed554e-d80f-6694-8cb9-02420a000272/AP-Step1.jpg)
After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.
![Application Output Step 3](https://dbp-cdn.mikroe.com/cms/shared-resources/1eed5550-3c0f-6800-a19f-02420a000272/AP-Step3.jpg)
Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.
![Application Output Step 4](https://dbp-cdn.mikroe.com/cms/shared-resources/1eed5550-d4d0-6b20-a348-02420a000272/AP-Step4.jpg)
Software Support
Library Description
This library contains API for Barometer 12 Click driver.
Key functions:
barometer12_inv_invpres_calib
- Barometer 12 inverse process data function.barometer12_get_raw_data
- Barometer 12 get RAW data function.barometer12_get_press_and_temp
- Barometer 12 get pressure and temperature function.
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief Barometer 12 Click example
*
* # Description
* This library contains API for the Barometer 12 Click driver.
* The library initializes and defines the I2C bus drivers
* to write and read data from registers.
* This demo application shows an example of
* atmospheric pressure and temperature measurement.
*
* The demo application is composed of two sections :
*
* ## Application Init
* The initialization of the I2C module and log UART.
* After driver initialization and default settings,
* the app display device ID.
*
* ## Application Task
* This is an example that shows the use of a Barometer 12 Click board™.
* Logs the atmospheric pressure [ Pa ] and temperature [ degree Celsius ] data.
* Results are being sent to the Usart Terminal where you can track their changes.
*
* @author Stefan Ilic
*
*/
#include "board.h"
#include "log.h"
#include "barometer12.h"
static barometer12_t barometer12;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
barometer12_cfg_t barometer12_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
barometer12_cfg_setup( &barometer12_cfg );
BAROMETER12_MAP_MIKROBUS( barometer12_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == barometer12_init( &barometer12, &barometer12_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( BAROMETER12_ERROR == barometer12_default_cfg ( &barometer12 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
Delay_ms( 100 );
static uint16_t device_id;
err_t err_flag = barometer12_get_device_id( &barometer12, &device_id );
if ( BAROMETER12_ERROR == err_flag )
{
log_error( &logger, " Communication Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_printf( &logger, " Device ID : 0x%.4X \r\n", device_id );
log_printf( &logger, "----------------------------\r\n" );
Delay_ms( 1000 );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
float pressure;
float temperature;
barometer12_get_press_and_temp( &barometer12, &pressure, &temperature );
log_printf( &logger, " Pressure : %.2f Pa\r\n", pressure );
log_printf( &logger, " Temperature : %.2f C\r\n", temperature );
log_printf( &logger, "----------------------------\r\n" );
Delay_ms( 1000 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END