temphum25  2.1.0.0
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TempHum 25 Click

Temp&Hum 25 Click is a compact add-on board designed for precise temperature and humidity monitoring. This board features the SHT33-DIS-B2.5KS, a high-reliability, third-generation relative humidity and temperature sensor from Sensirion. This sensor offers exceptional accuracy and reliability, with a range of 0-100% RH and -40 to +125°C, and features ISO17025-certified calibration, CMOSens® technology, and NIST-traceability. The board supports the new Click Snap feature, allowing easy detachment of the sensor area for flexible use.

Click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Apr 2024.
  • Type : I2C type

Software Support

We provide a library for the TempHum 25 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

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 API for TempHum 25 Click driver.

Standard key functions :

Example key functions :

  • temphum25_read_serial_num This function reads the 4-bytes unique serial number by using I2C serial interface.
    err_t temphum25_read_serial_num ( temphum25_t *ctx, uint32_t *serial_num );
  • temphum25_start_measurement This function starts the measurement by sending the selected measurement command.
    err_t temphum25_start_measurement ( temphum25_t *ctx, uint16_t meas_cmd );
  • temphum25_read_measurement This function reads the temperature and humidity measurements results.
    err_t temphum25_read_measurement ( temphum25_t *ctx, float *temperature, float *humidity );

Example Description

This example demonstrates the use of TempHum 25 Click board by reading the temperature and humidity data.

The demo application is composed of two sections :

Application Init

Initializes the driver, performs the device reset, reads and displays the sensor unique serial number, and then starts the measurements with 1 MPS.

void application_init ( void )
{
log_cfg_t log_cfg;
temphum25_cfg_t temphum25_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
temphum25_cfg_setup( &temphum25_cfg );
TEMPHUM25_MAP_MIKROBUS( temphum25_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == temphum25_init( &temphum25, &temphum25_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
temphum25_reset_device ( &temphum25 );
uint32_t serial_num = 0;
if ( TEMPHUM25_OK == temphum25_read_serial_num ( &temphum25, &serial_num ) )
{
log_printf ( &logger, " Serial number: 0x%.8LX\r\n", serial_num );
}
log_info( &logger, " Application Task " );
}

Application Task

Reads the temperature (degC) and the relative humidity (RH) data and displays the results on the USB UART approximately once per second.

void application_task ( void )
{
float temperature = 0;
float humidity = 0;
if ( TEMPHUM25_OK == temphum25_read_measurement ( &temphum25, &temperature, &humidity ) )
{
log_printf ( &logger, " Temperature: %.2f degC\r\n", temperature );
log_printf ( &logger, " Humidity: %.2f %%RH\r\n\n", humidity );
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.TempHum25

Additional notes and informations

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.


TEMPHUM25_MAP_MIKROBUS
#define TEMPHUM25_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: temphum25.h:151
temphum25_cfg_t
TempHum 25 Click configuration object.
Definition: temphum25.h:185
temphum25_init
err_t temphum25_init(temphum25_t *ctx, temphum25_cfg_t *cfg)
TempHum 25 initialization function.
application_task
void application_task(void)
Definition: main.c:70
temphum25_cfg_setup
void temphum25_cfg_setup(temphum25_cfg_t *cfg)
TempHum 25 configuration object setup function.
temphum25_reset_device
void temphum25_reset_device(temphum25_t *ctx)
TempHum 25 reset device function.
temphum25_start_measurement
err_t temphum25_start_measurement(temphum25_t *ctx, uint16_t meas_cmd)
TempHum 25 start measurement function.
TEMPHUM25_CMD_MEAS_CONT_REP_HIGH_MPS_1
#define TEMPHUM25_CMD_MEAS_CONT_REP_HIGH_MPS_1
Definition: temphum25.h:82
temphum25_read_measurement
err_t temphum25_read_measurement(temphum25_t *ctx, float *temperature, float *humidity)
TempHum 25 read measurement function.
application_init
void application_init(void)
Definition: main.c:30
temphum25_read_serial_num
err_t temphum25_read_serial_num(temphum25_t *ctx, uint32_t *serial_num)
TempHum 25 read serial num function.
temphum25_t
TempHum 25 Click context object.
Definition: temphum25.h:165
TEMPHUM25_OK
@ TEMPHUM25_OK
Definition: temphum25.h:203