temphum20  2.0.0.0
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TempHum 20 click

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Click library

  • Author : Stefan Filipovic
  • Date : Sep 2021.
  • Type : I2C type

Software Support

We provide a library for the TempHum20 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 TempHum20 Click driver.

Standard key functions :

Example key functions :

  • temphum20_write_command This function writes a desired command data to the selected command byte.
    err_t temphum20_write_command ( temphum20_t *ctx, uint8_t cmd_byte, uint16_t cmd_data );
  • temphum20_get_measurement This function waits for the data to be ready, and then reads the temperature and humidity data and converts them to Celsius and Percents, respectively.
    err_t temphum20_get_measurement ( temphum20_t *ctx, float *temp, float *hum );
  • temphum20_set_operating_mode This function sets the device operating mode.
    err_t temphum20_set_operating_mode ( temphum20_t *ctx, uint8_t op_mode );

Example Description

This example demonstrates the use of Temp & Hum 20 click board.

The demo application is composed of two sections :

Application Init

Initializes the driver and logger and performs the click default configuration which resets the device and sets it to normal operating mode.

void application_init ( void )
{
log_cfg_t log_cfg;
temphum20_cfg_t temphum20_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
temphum20_cfg_setup( &temphum20_cfg );
TEMPHUM20_MAP_MIKROBUS( temphum20_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == temphum20_init( &temphum20, &temphum20_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( TEMPHUM20_ERROR == temphum20_default_cfg ( &temphum20 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}

Application Task

When the new data is ready, this function reads the temperature and humidity data and displays the results on the USB UART.

void application_task ( void )
{
float humidity, temperature = 0;
if ( TEMPHUM20_OK == temphum20_get_measurement ( &temphum20, &temperature, &humidity ) )
{
log_printf ( &logger, " Temperature: %.3f C\r\n", temperature );
log_printf ( &logger, " Humidity: %.3f %%\r\n\n", humidity );
}
}

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.TempHum20

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.


temphum20_set_operating_mode
err_t temphum20_set_operating_mode(temphum20_t *ctx, uint8_t op_mode)
TempHum 20 set operating mode function.
temphum20_write_command
err_t temphum20_write_command(temphum20_t *ctx, uint8_t cmd_byte, uint16_t cmd_data)
TempHum 20 write command function.
temphum20_cfg_t
TempHum 20 Click configuration object.
Definition: temphum20.h:176
TEMPHUM20_ERROR
@ TEMPHUM20_ERROR
Definition: temphum20.h:197
application_task
void application_task(void)
Definition: main.c:65
temphum20_default_cfg
err_t temphum20_default_cfg(temphum20_t *ctx)
TempHum 20 default configuration function.
TEMPHUM20_MAP_MIKROBUS
#define TEMPHUM20_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: temphum20.h:138
temphum20_init
err_t temphum20_init(temphum20_t *ctx, temphum20_cfg_t *cfg)
TempHum 20 initialization function.
TEMPHUM20_OK
@ TEMPHUM20_OK
Definition: temphum20.h:196
application_init
void application_init(void)
Definition: main.c:29
temphum20_get_measurement
err_t temphum20_get_measurement(temphum20_t *ctx, float *temp, float *hum)
TempHum 20 get measurement function.
temphum20_t
TempHum 20 Click context object.
Definition: temphum20.h:154
temphum20_cfg_setup
void temphum20_cfg_setup(temphum20_cfg_t *cfg)
TempHum 20 configuration object setup function.