Mikroelektronika d.o.o.
Barometer 8 Click Board
Barometer 8 Click Board
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Key Features:
- Niedriger Stromverbrauch, wählbarer dualer Vollskalen-Absolutdruckbereich, geringes Drucksensorrauschen, hohe Leistung, integrierte Temperaturkompensation, erweiterter Temperaturbereich und mehr
- Basierend auf dem ILPS22QS – einem hochpräzisen Absolutdrucksensor, der als Barometer mit digitalem Ausgang von STMicroelectronics fungiert
- Kann für verschiedene druckbasierte Anwendungen, Industrie, Verbraucher, Wetterstationen und mehr verwendet werden
- mikroBUS: I2C- und SPI-Schnittstellen
Das Barometer 8 Click Board™ ist eine kompakte Zusatzplatine zum Messen des Luftdrucks in einer bestimmten Umgebung. Diese Platine verfügt über den ILPS22QS, einen ultrakompakten piezoresistiven Absolutdrucksensor, der als Barometer mit digitalem Ausgang von STMicroelectronics fungiert. Der ILPS22QS umfasst ein Sensorelement und einen IC-Chip zur Signalverarbeitung in einem Gehäuse, wandelt den Druck in einen 24-Bit-Digitalwert um und sendet die Informationen über eine konfigurierbare Hostschnittstelle, die SPI- und I2C-Seriellkommunikation unterstützt. Es verfügt über einen wählbaren dualen Vollskalen-Absolutdruckbereich von bis zu 1260 hPa und 4060 hPa mit einer Genauigkeit von 0,5 hPa über einen weiten Betriebstemperaturbereich. Dieses Click Board™ ist für verschiedene druckbasierte Anwendungen, Industrie, Verbraucher, Wetterstationen und mehr geeignet.
Das Barometer 8 Click Board™ wird von einer mikroSDK-kompatiblen Bibliothek unterstützt, die Funktionen enthält, die die Softwareentwicklung vereinfachen. Dieses Click Board™ wird als vollständig getestetes Produkt geliefert und ist bereit für den Einsatz auf einem System, das mit der mikroBUS™-Buchse ausgestattet ist.
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.
Barometer 8 Click Board
Frequently Asked Questions
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