IR Thermo 4 Click

IR Thermo 4 Click is a compact add-on board for precise remote sensing applications. This board features the TPiS 1T 1386 L5.5 H thermopile sensor from Excelitas, known for its high accuracy and narrow 5° field of view (FoV). This sensor, part of the CaliPile™ family, features factory-calibrated data stored in EEPROM, ensuring reliable and accurate performance. The sensor also comes in an isothermal TO-39 package with an integrated lens hood for minimized stray light and enhanced thermal stability, making it ideal for challenging environmental conditions. With a built-in ADC and multiple filter options, the sensor's data is easily accessible via an I2C interface. IR Thermo 4 Click is well-suited for remote skin temperature monitoring, over-temperature protection, human presence sensing, and motion detection.

Click Product page

Click library

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

Software Support

We provide a library for the IR Thermo 4 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 IR Thermo 4 Click driver.

Standard key functions :

• irthermo4_cfg_setup Config Object Initialization function.

  void irthermo4_cfg_setup ( irthermo4_cfg_t *cfg );

• irthermo4_init Initialization function.

  err_t irthermo4_init ( irthermo4_t *ctx, irthermo4_cfg_t *cfg );

• irthermo4_default_cfg Click Default Configuration function.

  err_t irthermo4_default_cfg ( irthermo4_t *ctx );

Example key functions :

• irthermo4_read_ambient_temp This function reads and calculates the ambient temperature in degrees Celsius.

  err_t irthermo4_read_ambient_temp ( irthermo4_t *ctx, float *t_amb );

• irthermo4_read_object_temp This function reads and calculates the object temperature in degrees Celsius.

  err_t irthermo4_read_object_temp ( irthermo4_t *ctx, float *t_obj, float t_amb );

• irthermo4_get_int_pin This function returns the INT pin logic state.

  uint8_t irthermo4_get_int_pin ( irthermo4_t *ctx );

Example Description

This example demonstrates the use of IR Thermo 4 Click board by reading and displaying the ambient and object temperature measurements.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    irthermo4_cfg_t irthermo4_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    irthermo4_cfg_setup( &irthermo4_cfg );
    IRTHERMO4_MAP_MIKROBUS( irthermo4_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == irthermo4_init( &irthermo4, &irthermo4_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( IRTHERMO4_ERROR == irthermo4_default_cfg ( &irthermo4 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Reads the ambient and object temperature measurements twice per second and displays the results on the USB UART.

void application_task ( void )
{
    float ambient_temp = 0;
    float object_temp = 0;
    if ( IRTHERMO4_OK == irthermo4_read_ambient_temp ( &irthermo4, &ambient_temp ) )
    {
        log_printf ( &logger, " Ambient temperature: %.2f degC\r\n", ambient_temp );
        if ( IRTHERMO4_OK == irthermo4_read_object_temp ( &irthermo4, &object_temp, ambient_temp ) )
        {
            log_printf ( &logger, " Object temperature: %.2f degC\r\n\n", object_temp );
        }
    }
    Delay_ms ( 500 );
}

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.IRThermo4

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.