pht  2.0.0.0
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PHT click

PHT Click is a compact add-on board that contains a PHT combo sensor. This board features the MS8607, a digital combination sensor providing 3 environmental measurements all-in-one: pressure, humidity, and temperature from TE Connectivity. This sensor is based on leading MEMS technologies, provides factory-calibrated PHT data available over an I2C serial interface.

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Click library

  • Author : Stefan Ilic
  • Date : Jul 2021.
  • Type : I2C type

Software Support

We provide a library for the PHT 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 PHT Click driver.

Standard key functions :

Example key functions :

Example Description

This is an example that demonstrates the use of the PHT Click board.

The demo application is composed of two sections :

Application Init

Initialization driver enables - I2C, performs the device reset and determines the oversampling ratio, also write log.

void application_init ( void ) {
log_cfg_t log_cfg;
pht_cfg_t pht_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
pht_cfg_setup( &pht_cfg );
PHT_MAP_MIKROBUS( pht_cfg, MIKROBUS_1 );
err_t init_flag = pht_init( &pht, &pht_cfg );
if ( I2C_MASTER_ERROR == init_flag ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_printf( &logger, "--------------------------- \r\n " );
log_printf( &logger, " Device reset \r\n" );
pht_reset( &pht );
Delay_ms( 100 );
log_printf( &logger, "--------------------------- \r\n " );
log_printf( &logger, " Set Oversampling Ratio \r\n" );
Delay_ms( 100 );
log_printf( &logger, "--------------------------- \r\n " );
log_info( &logger, " Application Task " );
log_printf( &logger, "--------------------------- \r\n " );
}

Application Task

PHT Click board can be used to measure Pressure, Temperature and Relative Humidity. All data logs write on USB uart changes every 3 sec.

void application_task ( void ) {
Delay_ms( 10 );
Delay_ms( 10 );
log_printf( &logger, " Preassure : %.2f mbar \r\n ", pressure );
log_printf( &logger, " Humidity : %.2f %% \r\n ", humidity );
log_printf( &logger, " Temperature : %.2f C \r\n ", temperature );
log_printf( &logger, "--------------------------- \r\n " );
Delay_ms( 3000 );
}

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.PHT

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.


pht_get_temperature_pressure
void pht_get_temperature_pressure(pht_t *ctx, float *temperature, float *pressure)
Get temperature and pressure function.
pht_set_ratio
uint8_t pht_set_ratio(pht_t *ctx, uint8_t temp_ratio, uint8_t press_ratio)
Set Ratio function.
pressure
float pressure
Definition: main.c:32
humidity
float humidity
Definition: main.c:33
application_task
void application_task(void)
Definition: main.c:77
temperature
float temperature
Definition: main.c:34
pht_cfg_t
PHT Click configuration object.
Definition: pht.h:152
PHT_PT_CMD_RATIO_2048
#define PHT_PT_CMD_RATIO_2048
Definition: pht.h:77
PHT_MAP_MIKROBUS
#define PHT_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: pht.h:126
pht_cfg_setup
void pht_cfg_setup(pht_cfg_t *cfg)
PHT configuration object setup function.
application_init
void application_init(void)
Definition: main.c:36
pht_t
PHT Click context object.
Definition: pht.h:138
pht_get_relative_humidity
void pht_get_relative_humidity(pht_t *ctx, float *humidity)
Get humidity function.
pht_init
err_t pht_init(pht_t *ctx, pht_cfg_t *cfg)
PHT initialization function.
pht_reset
void pht_reset(pht_t *ctx)
Reset function.