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.
| 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 |
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 |
| 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 |
| 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 |
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.
This library contains API for the Barometer 8 Click Board™ driver.
Key functions
barometer8_write_register This function writes a desired data byte to the selected register.
barometer8_read_register This function reads a data byte from the selected register.
barometer8_read_data This function reads the pressure and temperature raw data and converts them to mBar and Celsius.
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:
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.
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.
- manufacturer: Mikroelektronika d.o.o. - warranty: 12 months - backorder_label: If no stock shown above, check availability - subtitle: High-Resolution Air Pressure Sensor - feature_1: Based on the ILPS22QS - high-accuracy absolute pressure sensor that functions as a digital output barometer from STMicroelectronics - feature_2: Low power consumption, selectable dual full-scale absolute pressure range, low pressure sensor noise, high-performance, embedded temperature compensation, extended temperature range, and more - feature_3: Can be used for various pressure-based applications, industrial, consumer, weather stations, and more - attachments: [{"download_file":[{"download_file":"Barometer 8 Click Board™ Schematic"}],"download_filetype":[{"download_filetype":"pdf"}]},{"download_file":[{"download_file":"STMicroelectronics ILPS22QS Piezoeresistive Sensor Datasheet"}],"download_filetype":[{"download_filetype":"pdf"}]}] - mpn: MIKROE-5128 - mpn: MIKROE-5128 - custom_label_0: Click Board - google_product_category: Electronics - custom_product: false - condition: new - key_feature_2: Low power consumption, selectable dual full-scale absolute pressure range, low pressure sensor noise, high-performance, embedded temperature compensation, extended temperature range, and more - key_feature_3: Based on the ILPS22QS - high-accuracy absolute pressure sensor that functions as a digital output barometer from STMicroelectronics - key_feature_4: Can be used for various pressure-based applications, industrial, consumer, weather stations, and more - key_feature_5: mikroBUS: I2C and SPI Interfaces - device_vendor: STMicroelectronics - device_type: ILPS22QSTR - warranty: 12 months - brand: MikroE - manufacturer: Mikroelektronika d.o.o. - target_keyword: Barometer 8 Click Board - brands: gid://shopify/Metaobject/56256004319 - breadcrumbs: ["gid://shopify/Collection/447955239135","gid://shopify/Collection/241680580797","gid://shopify/Collection/241545969853"] - customhs_code: 847330 - detailed_description: {"type":"root","children":[{"type":"heading","level":3,"children":[{"type":"text","value":"How Does The Barometer 8 Click Board™ Work?"}]},{"type":"paragraph","children":[{"type":"text","value":"The "},{"type":"text","value":"Barometer 8 Click Board™","bold":true,"italic":true},{"type":"text","value":" 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."}]},{"type":"paragraph","children":[{"type":"text","value":""}]},{"type":"paragraph","children":[{"type":"text","value":"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."}]},{"type":"paragraph","children":[{"type":"text","value":"The "},{"type":"text","value":"Barometer 8 Click Board™","bold":true},{"type":"text","value":" 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."}]},{"type":"paragraph","children":[{"type":"text","value":"The "},{"type":"text","value":"Barometer 8 Click Board™","bold":true},{"type":"text","value":" 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."}]},{"type":"heading","level":3,"children":[{"type":"text","value":"SPECIFICATIONS"}]},{"type":"paragraph","children":[{"type":"text","value":"Type\nPressure\nApplications\nThe Barometer 8 Click Board™ can be used for various pressure-based applications, industrial, consumer, weather stations, and more\nOn-board modules\nILPS22QS - high-accuracy absolute pressure sensor that functions as a digital output barometer from STMicroelectronics\nKey Features\nLow power consumption, selectable dual full-scale absolute pressure range, low pressure sensor noise, high-performance, embedded temperature compensation, extended temperature range, and more\nInterface\nI2C,SPI\nCompatibility\nmikroBUS\nClick board size\nS (28.6 x 25.4 mm)\nInput Voltage\n3.3V"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"PINOUT DIAGRAM"}]},{"type":"paragraph","children":[{"type":"text","value":"This table shows how the pinout of the "},{"type":"text","value":"Barometer 8 Click Board™","bold":true},{"type":"text","value":" corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns)."}]},{"type":"paragraph","children":[{"type":"text","value":"Notes\nPin\nPin\nNotes\nNC\n1\nAN\nPWM\n16\nNC\nNC\n2\nRST\nINT\n15\nNC\nSPI Chip Select\nCS\n3\nCS\nRX\n14\nNC\nSPI Clock\nSCK\n4\nSCK\nTX\n13\nNC\nSPI Data OUT\nSDO\n5\nMISO\nSCL\n12\nSCL\nI2C Clock\nSPI Data IN\nSDI\n6\nMOSI\nSDA\n11\nSDA\nI2C Data\nPower Supply\n3.3V\n7\n3.3V\n5V\n10\nNC\nGround\nGND\n8\nGND\nGND\n9\nGND\nGround"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"ONBOARD SETTINGS AND INDICATORS"}]},{"type":"paragraph","children":[{"type":"text","value":"Label\nName\nDefault\nDescription\nLD1\nPWR\n-\nPower LED Indicator\nJP1-JP2\nCOMM SEL\nLeft\nCommunication Interface Selection SPI/I2C: Left position SPI, Right position I2C"}]},{"type":"heading","level":3,"children":[{"type":"text","value":"BAROMETER 8 CLICK ELECTRICAL SPECIFICATIONS"}]},{"type":"paragraph","children":[{"type":"text","value":"Description\nMin\nTyp\nMax\nUnit\nSupply Voltage\n-\n3.3\n-\nV\nOperating Pressure Range\n260\n-\n1260(4060)\nhPa\nAccuracy\n-\n0.5\n-\nhPa\nResolution\n-\n24\n-\nbits\nOperating Temperature Range\n-40\n+25\n+105\n°C"}]}]} - summary:The Barometer 8 Click Board™ is a compact add-on board used to measure air pressure in a specific environment. This board features the ILPS22QS, an ultra-compact piezoresistive absolute pressure sensor that functions as a digital output barometer from STMicroelectronics. The ILPS22QS comprises a sensing element and an IC chip for signal processing in one package, converts pressure into a 24-bit digital value, and sends the information via a configurable host interface that supports SPI and I2C serial communications. It has a selectable dual full-scale absolute pressure range, up to 1260hPa and 4060hPa, with an accuracy of 0.5hPa over a wide operating temperature range. This Click board™ is suited for various pressure-based applications, industrial, consumer, weather stations, and more.
The Barometer 8 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.