temphum22  2.1.0.0
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TempHum 22 Click

Temp&Hum 22 Click is a compact add-on board representing temperature and humidity sensing solution. This board features the SHT41A, a 4th generation automotive-grade relative humidity and temperature sensor from Sensirion. The SHT41A is characterized by its high accuracy (±2% RH and ±0.3°C over a wide operating temperature range) and high resolution providing 16-bit data to the host controller with a configurable I2C interface. Also, it is designed for reliable operation in harsh conditions such as condensing environments.

Click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Aug 2022.
  • Type : I2C type

Software Support

We provide a library for the TempHum 22 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 22 Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of Temp & Hum 22 Click board by reading the temperature and humidity data.

The demo application is composed of two sections :

Application Init

Initializes the driver, performs the sensor software reset and then reads and displays the sensor unique serial number.

void application_init ( void )
{
log_cfg_t log_cfg;
temphum22_cfg_t temphum22_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
temphum22_cfg_setup( &temphum22_cfg );
TEMPHUM22_MAP_MIKROBUS( temphum22_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == temphum22_init( &temphum22, &temphum22_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( TEMPHUM22_OK == temphum22_soft_reset ( &temphum22 ) )
{
log_printf ( &logger, " Software reset\r\n" );
}
Delay_1sec ( );
uint32_t serial_num;
if ( TEMPHUM22_OK == temphum22_read_serial_num ( &temphum22, &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, humidity;
if ( TEMPHUM22_OK == temphum22_read_measurement_high_precision ( &temphum22, &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.TempHum22

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.


temphum22_cfg_t
TempHum 22 Click configuration object.
Definition: temphum22.h:158
temphum22_cfg_setup
void temphum22_cfg_setup(temphum22_cfg_t *cfg)
TempHum 22 configuration object setup function.
application_task
void application_task(void)
Definition: main.c:72
temphum22_read_serial_num
err_t temphum22_read_serial_num(temphum22_t *ctx, uint32_t *serial_num)
TempHum 22 read serial num function.
temphum22_init
err_t temphum22_init(temphum22_t *ctx, temphum22_cfg_t *cfg)
TempHum 22 initialization function.
temphum22_read_measurement_high_precision
err_t temphum22_read_measurement_high_precision(temphum22_t *ctx, float *temp, float *hum)
TempHum 22 read measurement high precision function.
TEMPHUM22_OK
@ TEMPHUM22_OK
Definition: temphum22.h:173
application_init
void application_init(void)
Definition: main.c:30
TEMPHUM22_MAP_MIKROBUS
#define TEMPHUM22_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: temphum22.h:132
temphum22_t
TempHum 22 Click context object.
Definition: temphum22.h:144
temphum22_soft_reset
err_t temphum22_soft_reset(temphum22_t *ctx)
TempHum 22 soft reset function.