Mikroelektronika d.o.o.
SKU: MIKROE-4894Diff Press 2 Click Board
Diff Press 2 Click Board
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The Diff Press 2 Click Board™ is a compact add-on board that contains Sensirion’s differential pressure sensor. This board features the SDP31-500PA, a small differential pressure sensor designed for high-volume applications. The SDP31-500PA comes with a configurable host interface that supports I2C serial communication and measures pressure in a range from -500Pa up to +500Pa with an accuracy of 3%. It comes as calibrated and temperature compensated with high reliability/long-term stability, has the best signal-to-noise ratio. It operates in a temperature range of -40°C to 85°C, ensuring stable operation under extreme conditions. This Click board™ is suitable for weather station equipment, industrial, consumer applications, and similar applications which rely on accurate and reliable pressure monitoring.
The Diff Press 2 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 Diff Press 2 Click Board™ Work?
The Diff Press 2 Click Board™ as its foundation uses the SDP31-500PA, a highly versatile differential pressure sensor designed for high-volume applications from Sensirion. It builds on the next-generation CMOSens® sensor chip at the heart of Sensirion's new differential pressure and flows sensing platform. It features fast measurement speed, excellent accuracy, and long-term stability, has no zero-point drift, and offers an ultra-low power consumption, making the SDP31-500PA the perfect choice for applications where accurate and reliable pressure monitoring is essential.
The SDP31-500PA is very flexible regarding measurement speed. This flexibility allows for optimizing the sensor's performance to a specific application and for adapting the sensor to different use cases. For example, the sensor detects the smallest and quickest changes in one use case, whereas, in another mode, the sensor can measure in larger intervals while consuming only little energy.
The Diff Press 2 Click Board™ communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Fast Mode up to 400kHz. Besides, the SDP31-500PA allows choosing the least significant bit (LSB) of its I2C slave address using the SMD jumper labelled ADDR SEL. It also possesses an additional interrupt signal, routed on the INT pin of the mikroBUS™ socket labelled as INT, indicating when a specific interrupt event occurs, such as indicating whether new measurement results are available.
The Diff Press 2 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the I2C communication lines properly. However, the 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.
SPECIFICATIONS
| Type | Pressure |
| Applications | The Diff Press 2 Click Board™ can be used for weather station equipment, industrial, consumer applications, and similar applications which rely on accurate and reliable pressure monitoring |
| On-board modules | SDP31 - highly versatile differential pressure sensor designed for high-volume applications from Sensirion |
| Key Features | Low power consumption, measurement range ±500Pa, excellent accuracy and repeatability even below 1Pa, no zero-offset and drift, calibrated and temperature compensated, and more |
| Interface | I2C |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout od the Diff Press 2 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 | |
| NC | 3 | CS | RX | 14 | NC | ||
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
| JP2 | ADDR SEL | left | I2C Address Selection R4/GND: Left position R4, Right position GND |
DIFF PRESS 2 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Measurement Range | -500 | - | 500 | Pa |
| Accuracy | - | 3 | - | % |
| Resolution | - | 16 | - | bit |
| Operating Temperature Range | -40 | +25 | +85 | °C |
Software Support
We provide a library for the Diff Press 2 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 Diff Press 2 Click Board™ driver.
Key functions
-
diffpress2_get_idReads device ID's -
diffpress2_resetReset device -
diffpress2_trigger_measurementPressure and temperature reading
Example Description
This example application showcases ability for device to read and calculate mass flow or diff press pressure in Pascals and temperature in degrees Celsius.
void application_task ( void )
{
float pressure;
float temperature;
if ( diffpress2_trigger_measurement( &diffpress2, DIFFPRESS2_CMD_TRIGGER_MEAS_DIFF_PRESS,
&pressure, &temperature ) )
{
log_error( &logger, " Read data." );
}
else
{
log_printf( &logger, " > Pressure[Pa]: %.2frn", pressure );
log_printf( &logger, " > Temperature[degC]: %.2frn", temperature );
log_printf( &logger, "*************************************rn" );
}
Delay_ms( 300 );
}
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.DiffPress2
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 Diff Press 2 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.
Diff Press 2 Click Board
Frequently Asked Questions
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