Mikroelektronika d.o.o.
SKU: MIKROE-4765Pressure 16 Click Board
Pressure 16 Click Board
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The Pressure 16 Click Board™ is a compact add-on board that contains a board-mount pressure sensor. This board features the WSEN-PADS (2511020213301), a high-precision MEMS-based digital absolute pressure sensor from Würth Elektronik. It has a fully-calibrated 24-bit pressure output to provide accurate atmospheric pressure data with a configurable host interface that supports both I2C and SPI serial communication and with an intelligent on-chip motion-triggered interrupt feature. This Click Board™ is suitable for weather station equipment, altimeter and barometer applications, industrial, consumer applications, and many more.
The Pressure 16 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 The Pressure 16 Click Board™ Work?
The Pressure 16 Click Board™ as its foundation uses the WSEN-PADS, a high-resolution, ultra-compact piezoresistive absolute pressure sensor from Würth Elektronik. This MEMS-based absolute pressure sensor includes a sensing element, analogue to digital converter, filters, and digital interface that sends the digital pressure data to the host controller. The MEMS-based sensing element consists of piezo-resistors on a thin Si-diaphragm connected in a Wheatstone bridge configuration, which detects absolute pressure in a range of 26 up to 126kPa with selectable output data rate up to 200Hz. This measurement range corresponds to the altitude range from -1877m (below sea level) to 10,109m (above sea level).
The absolute accuracy of the sensor, which is the output deviation from an ideal transfer function over the operating pressure range, is 100Pa that corresponds to approximately 8 meters in altitude. The piezoresistive sensing element of the WSEN-PADS is also sensitive to temperature changes and causes offset errors during pressure measurement. Therefore, real-time temperature compensation of the measured pressure plays an essential role in achieving high accuracy performed with the on-chip temperature sensor.
The Pressure 16 Click Board™ allows using both I2C and SPI interfaces with a maximum frequency of 100kHz in Standard and 400kHz in Fast mode 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. While the I2C interface is selected, the WSEN-PADS allows the choice of the least significant bit (LSB) of its I2C slave address using the SMD jumper labelled as ADDR SEL.
Also, the WSEN-PADS features an interrupt signal routed on the INT pin of the mikroBUS™ socket, which indicates when a new set of measured pressure data are available, simplifying data synchronization in the digital system that uses the device.
The Pressure 16 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with 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 | Can be used for weather station equipment, altimeter and barometer applications, industrial, consumer applications, and many more |
| On-board modules | WSEN-PADS - high-resolution, ultra-compact piezoresistive absolute pressure sensor from Würth Elektronik |
| Key Features | Low power consumption, high precision, MEMS-based piezo-resistive sensing principle, fully calibrated 24-bit pressure output, selectable output data rate up to 200Hz, embedded temperature sensor, interrupt feature, 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 on the Pressure 16 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 | INT | Interrupt | |
| 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-JP4 | COMM SEL | Right | Communication Interface Selection SPI/I2C: Left position SPI, Right position I2C |
| JP5 | ADDR SEL | Right | I2C Address Selection 0/1: Left position 0, Right position 1 |
Pressure 16 Click electrical specifications
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| Operating Pressure Range | 26 | - | 126 | kPa |
| Output Data Rate | 0 | - | 200 | Hz |
| Pressure Output Data Resolution | - | 24 | - | bit |
| Operating Temperature Range | -40 | +25 | +85 | °C |
Software Support
We provide a library for the Pressure 16 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 Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe GitHub account.
Library Description
This library contains an API for the Pressure 16 Click Board™ driver.
Key Functions
pressure16_cfg_setup- Config Object Initialization function.pressure16_init- Initialization function.pressure16_default_cfg- Click the Default Configuration function.
Example Description
This library contains an API for the Pressure 16 Click Board™ driver. This demo application shows an example of pressure and temperature measurement
The application is composed of three sections :
void application_task ( void )
{
static float pressure, temperature;
pressure16_get_press_temp( &pressure16, &pressure, &temperature );
log_printf( &logger, " Pressure : %.2f mbar rn", pressure );
log_printf( &logger, " Temperature : %.2f C rn", temperature );
log_printf( &logger, "---------------------------rn" );
Delay_ms( 1000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe GitHub account.
Other mikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Pressure16
Additional Notes and Information
Depending on the development board you are using, you may need a 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
The Pressure 16 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.
Pressure 16 Click Board
Frequently Asked Questions
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