Mikroelektronika d.o.o.
Baromètre 8 Click Board
Baromètre 8 Click Board
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Key Features
- Faible consommation d'énergie, double plage de pression absolue sélectionnable à pleine échelle, faible bruit du capteur de pression, hautes performances, compensation de température intégrée, plage de température étendue, etc.
- Basé sur l'ILPS22QS - capteur de pression absolue de haute précision qui fonctionne comme un baromètre à sortie numérique de STMicroelectronics
- Peut être utilisé pour diverses applications basées sur la pression, industrielles, grand public, stations météorologiques, etc.
- mikroBUS : interfaces I2C et SPI
Overview
La carte Click Board™ Barometer 8 est une carte complémentaire compacte utilisée pour mesurer la pression atmosphérique dans un environnement spécifique. Cette carte comprend l'ILPS22QS, un capteur de pression absolue piézorésistif ultra-compact qui fonctionne comme un baromètre à sortie numérique de STMicroelectronics. L'ILPS22QS comprend un élément de détection et une puce IC pour le traitement du signal dans un seul boîtier, convertit la pression en une valeur numérique 24 bits et envoie les informations via une interface hôte configurable qui prend en charge les communications série SPI et I2C. Il dispose d'une double plage de pression absolue pleine échelle sélectionnable, jusqu'à 1260 hPa et 4060 hPa, avec une précision de 0,5 hPa sur une large plage de températures de fonctionnement. Cette carte Click™ est adaptée à diverses applications basées sur la pression, industrielles, grand public, stations météorologiques, etc.
Le Barometer 8 Click Board™ est pris en charge par une bibliothèque compatible mikroSDK, qui comprend des fonctions qui simplifient le développement logiciel. Ce Click board™ est un produit entièrement testé, prêt à être utilisé sur un système équipé du socket mikroBUS™.
How Does The Barometer 8 Click Board™ Work?
The Barometer 8 Click Board™ as its foundation uses the ILPS22QS, a high-accuracy absolute pressure sensor that functions as a digital output barometer from STMicroelectronics. The ILPS22QS delivers ultra-low pressure noise with low power consumption and operates over an extended temperature range from -40°C to +105°C. It has a selectable dual full-scale absolute pressure range, from 260 up to 1260hPa or 4060hPa, with an accuracy of 0.5hPa, ideally suited to the harsh environmental conditions in industrial and consumer applications.
The ILPS22QS comprises a sensing element based on a piezoresistive Wheatstone bridge approach and an IC interface that provides a digital signal from the sensing element to the application. The sensing element, which detects absolute pressure, consists of a suspended membrane manufactured using a dedicated process developed by ST. A silicon spring structure surrounds this silicon membrane, and it contributes to isolating the membrane from mechanical and thermal stress in applications. When pressure is applied, the membrane deflection induces an imbalance in the Wheatstone bridge piezoresistance, whose output signal is converted by the selected interface.
The Barometer 8 Click Board™ allows using both I2C and SPI interfaces with a maximum frequency of 1MHz for I2C and 8MHz for SPI communication. The selection can be made by positioning SMD jumpers labelled as COMM SEL to an appropriate position. Note that all the jumpers' positions must be on the same side, or the Click board™ may become unresponsive.
The Barometer 8 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. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
| Type | Pressure |
| Applications | The Barometer 8 Click Board™ can be used for various pressure-based applications, industrial, consumer, weather stations, and more |
| On-board modules | ILPS22QS - high-accuracy absolute pressure sensor that functions as a digital output barometer from STMicroelectronics |
| Key Features | Low power consumption, selectable dual full-scale absolute pressure range, low pressure sensor noise, high-performance, embedded temperature compensation, extended temperature range, and more |
| Interface | I2C,SPI |
| Compatibility | mikroBUS |
| Click board size | S (28.6 x 25.4 mm) |
| Input Voltage | 3.3V |
PINOUT DIAGRAM
This table shows how the pinout of the Barometer 8 Click Board™ 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 | NC | ||
| SPI Chip Select | CS | 3 | CS | RX | 14 | NC | |
| SPI Clock | SCK | 4 | SCK | TX | 13 | NC | |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | SCL | I2C Clock |
| SPI Data IN | SDI | 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
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1-JP2 | COMM SEL | Left | Communication Interface Selection SPI/I2C: Left position SPI, Right position I2C |
BAROMETER 8 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| Operating Pressure Range | 260 | - | 1260(4060) | hPa |
| Accuracy | - | 0.5 | - | hPa |
| Resolution | - | 24 | - | bits |
| Operating Temperature Range | -40 | +25 | +105 | °C |
Software Support
We provide a library for the Barometer 8 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the Barometer 8 Click Board™ driver.
Key functions
-
barometer8_write_registerThis function writes a desired data byte to the selected register. -
barometer8_read_registerThis function reads a data byte from the selected register. -
barometer8_read_dataThis function reads the pressure and temperature raw data and converts them to mBar and Celsius.
Example Description
This example demonstrates the use of the Barometer 8 Click Board™ by reading and displaying the pressure and temperature values.
void application_task ( void )
{
float pressure, temperature;
if ( BAROMETER8_OK == barometer8_read_data ( &barometer8, &pressure, &temperature ) )
{
log_printf ( &logger, " Pressure: %.1f mBarrn", pressure );
log_printf ( &logger, " Temperature: %.2f Crnn", temperature );
}
Delay_ms( 5 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The 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.Barometer8
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. UART terminal is available in all MikroElektronika compilers.
MIKROSDK
The Barometer 8 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.
Software Support
We provide a library for the Barometer 8 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the Barometer 8 Click Board™ driver.
Key functions
-
barometer8_write_registerThis function writes a desired data byte to the selected register. -
barometer8_read_registerThis function reads a data byte from the selected register. -
barometer8_read_dataThis function reads the pressure and temperature raw data and converts them to mBar and Celsius.
Example Description
This example demonstrates the use of the Barometer 8 Click Board™ by reading and displaying the pressure and temperature values.
void application_task ( void )
{
float pressure, temperature;
if ( BAROMETER8_OK == barometer8_read_data ( &barometer8, &pressure, &temperature ) )
{
log_printf ( &logger, " Pressure: %.1f mBarrn", pressure );
log_printf ( &logger, " Temperature: %.2f Crnn", temperature );
}
Delay_ms( 5 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The 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.Barometer8
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. UART terminal is available in all MikroElektronika compilers.
MIKROSDK
The Barometer 8 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.
Frequently Asked Questions
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