10 min

Measure and understand atmospheric pressure with MS5839-02BA and MK64FN1M0VDC12

Ensure your data is as clear as the sky

Pressure 22 Click with Clicker 2 for Kinetis

Published Nov 12, 2023

Click board™

Pressure 22 Click

Dev Board

Clicker 2 for Kinetis


NECTO Studio



Take your altitude measurements to new heights with our small digital altimeter, uniquely optimized for applications in chlorine and saline environments.



Hardware Overview

How does it work?

Pressure 22 Click is based on the MS5839-02BA, an ultra-compact chlorine-resistant digital pressure and temperature sensor from TE Connectivity. It has a primary pressure operating range of 300 up to 1200mbar. The gel-filled design offers this sensor advanced water resistance, thus allowing it to measure extended pressure range from 10 up to 2000mbar, hence the 02BA in the marking. The overpressure comes at 10 bar. The sensor delivers a decent pressure sensing accuracy of ±0.5mbar. In addition to pressure, this sensor can measure the temperature in a range of -20 up to 85°C

with a temperature sensing accuracy of ±2°C. It integrates the 24-bit sigma-delta analog-to-digital converter for both the pressure and the temperature sensors. The MS5839-02BA sensor consists of a piezo-resistive sensor and a sensor interface integrated circuit. It converts the sensor's uncompensated analog output value voltage to a 24-bit digital value. The sensor is factory calibrated at two temperature and pressure points, where, as a result, six coefficients necessary to compensate for process variations and temperature variations are calculated and stored in the 112-bit PROM

of the sensor. Pressure 22 Click uses a standard 2-Wire I2C interface to communicate with the host MCU, supporting clock speeds up to 400KHz. The reset is only available over the I2C interface, as well as the read from the PROM. This 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. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.

Pressure 22 Click hardware overview image

Features overview

Development board

Clicker 2 for Kinetis is a compact starter development board that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit ARM Cortex-M4F microcontroller, the MK64FN1M0VDC12 from NXP Semiconductors, two mikroBUS™ sockets for Click board™ connectivity, a USB connector, LED indicators, buttons, a JTAG programmer connector, and two 26-pin headers for interfacing with external electronics. Its compact design with clear and easily recognizable silkscreen markings allows you to build gadgets with unique functionalities and

features quickly. Each part of the Clicker 2 for Kinetis development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the Clicker 2 for Kinetis programming method, using a USB HID mikroBootloader or an external mikroProg connector for Kinetis programmer, the Clicker 2 board also includes a clean and regulated power supply module for the development kit. It provides two ways of board-powering; through the USB Micro-B cable, where onboard voltage regulators provide the appropriate voltage levels to each component on the board, or

using a Li-Polymer battery via an onboard battery connector. All communication methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, reset button, and several user-configurable buttons and LED indicators. Clicker 2 for Kinetis is an integral part of the Mikroe ecosystem, allowing you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

Clicker 2 for Kinetis dimensions image

Microcontroller Overview

MCU Card / MCU



ARM Cortex-M4

MCU Memory (KB)


Silicon Vendor


Pin count


RAM (Bytes)


Used MCU Pins

mikroBUS™ mapper

Power Supply
I2C Clock
I2C Data

Take a closer look


Pressure 22 Click Schematic schematic

Step by step

Project assembly

Clicker 2 for PIC32MZ front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Clicker 2 for Kinetis as your development board.

Clicker 2 for PIC32MZ front image hardware assembly
Buck 22 Click front image hardware assembly
Prog-cut hardware assembly
Micro B Connector Clicker 2 - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
Flip&Click PIC32MZ MCU step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

Track your results in real time

Application Output

After loading the code example, pressing the "DEBUG" button builds and programs it on the selected setup.

Application Output Step 1

After programming is completed, a header with buttons for various actions available in the IDE appears. By clicking the green "PLAY "button, we start reading the results achieved with Click board™.

Application Output Step 3

Upon completion of programming, the Application Output tab is automatically opened, where the achieved result can be read. In case of an inability to perform the Debug function, check if a proper connection between the MCU used by the setup and the CODEGRIP programmer has been established. A detailed explanation of the CODEGRIP-board connection can be found in the CODEGRIP User Manual. Please find it in the RESOURCES section.

Application Output Step 4

Software Support

Library Description

This library contains API for Pressure 22 Click driver.

Key functions:

  • pressure22_get_measurement_data - Pressure 22 get the measurement data function.

  • pressure22_get_calibration_data - Pressure 22 gets the calibration data function.

  • pressure22_get_adc_data - Pressure 22 gets the ADC data function.

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

 * @file main.c
 * @brief Pressure 22 Click example
 * # Description
 * This library contains API for Pressure 22 Click driver.
 * The demo application reads and calculate pressure and temperature data.
 * The demo application is composed of two sections :
 * ## Application Init
 * The initialization of I2C module and log UART.
 * After driver initialization, the app sets the default configuration.
 * ## Application Task
 * This example demonstrates the use of the Pressure 22 Click board™.
 * The demo application reads and displays the Pressure [mBar] 
 * and Temperature [degree Celsius] data.
 * Results are being sent to the UART Terminal, where you can track their changes.
 * @author Nenad Filipovic

#include "board.h"
#include "log.h"
#include "pressure22.h"

static pressure22_t pressure22;
static log_t logger;

void application_init ( void ) 
    log_cfg_t log_cfg;  /**< Logger config object. */
    pressure22_cfg_t pressure22_cfg;  /**< Click config object. */

     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    pressure22_cfg_setup( &pressure22_cfg );
    PRESSURE22_MAP_MIKROBUS( pressure22_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == pressure22_init( &pressure22, &pressure22_cfg ) ) 
        log_error( &logger, " Communication init." );
        for ( ; ; );
    if ( PRESSURE22_ERROR == pressure22_default_cfg ( &pressure22 ) )
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    log_info( &logger, " Application Task " );
    log_printf( &logger, " ____________________ \r\n" );
    Delay_ms( 100 );

void application_task ( void ) 
    static float temperature, pressure;
    if ( PRESSURE22_OK == pressure22_get_measurement_data( &pressure22, &temperature, &pressure ) )
        log_printf( &logger, " Temperature : %.2f degC \r\n", temperature );
        log_printf( &logger, " Pressure    : %.2f mBar \r\n", pressure );
        log_printf( &logger, " _______________________ \r\n" );
        Delay_ms( 1000 );

void main ( void ) 
    application_init( );

    for ( ; ; ) 
        application_task( );

// ------------------------------------------------------------------------ END

Additional Support