temphum23  2.1.0.0
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TempHum 23 click

Temp&Hum 23 Click is a compact add-on board representing temperature and humidity sensing solution. This board features the SHT45, a 4th generation ultra-low-power relative humidity and temperature sensor from Sensirion. The SHT45 is characterized by its high accuracy (±1% RH and ±0.1°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. This Click board™ is perfectly suitable for high-volume applications.

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Click library

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

Software Support

We provide a library for the TempHum 23 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 23 Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of Temp & Hum 23 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;
temphum23_cfg_t temphum23_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
temphum23_cfg_setup( &temphum23_cfg );
TEMPHUM23_MAP_MIKROBUS( temphum23_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == temphum23_init( &temphum23, &temphum23_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( TEMPHUM23_OK == temphum23_soft_reset ( &temphum23 ) )
{
log_printf ( &logger, " Software reset\r\n" );
}
Delay_1sec ( );
uint32_t serial_num;
if ( TEMPHUM23_OK == temphum23_read_serial_num ( &temphum23, &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 ( TEMPHUM23_OK == temphum23_read_measurement_high_precision ( &temphum23, &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.TempHum23

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.


temphum23_t
TempHum 23 Click context object.
Definition: temphum23.h:140
temphum23_cfg_t
TempHum 23 Click configuration object.
Definition: temphum23.h:154
temphum23_cfg_setup
void temphum23_cfg_setup(temphum23_cfg_t *cfg)
TempHum 23 configuration object setup function.
temphum23_soft_reset
err_t temphum23_soft_reset(temphum23_t *ctx)
TempHum 23 soft reset function.
application_task
void application_task(void)
Definition: main.c:72
TEMPHUM23_MAP_MIKROBUS
#define TEMPHUM23_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: temphum23.h:128
application_init
void application_init(void)
Definition: main.c:30
temphum23_read_measurement_high_precision
err_t temphum23_read_measurement_high_precision(temphum23_t *ctx, float *temp, float *hum)
TempHum 23 read measurement high precision function.
temphum23_read_serial_num
err_t temphum23_read_serial_num(temphum23_t *ctx, uint32_t *serial_num)
TempHum 23 read serial num function.
TEMPHUM23_OK
@ TEMPHUM23_OK
Definition: temphum23.h:169
temphum23_init
err_t temphum23_init(temphum23_t *ctx, temphum23_cfg_t *cfg)
TempHum 23 initialization function.