Water Detect 3 Click

Water Detect 3 Click is a compact add-on board that detects water and other electroconductive liquids. This board features the MCP606, a micropower CMOS operational amplifier from Microchip. In the same package, the Water Detect 3 Click comes with a separate PCB with an electroconductive water detection area connected to a Click board™ with wires.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Aug 2023.
• Type : GPIO type

Software Support

We provide a library for the Water Detect 3 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 Water Detect 3 Click driver.

Standard key functions :

• waterdetect3_cfg_setup Config Object Initialization function.

  void waterdetect3_cfg_setup ( waterdetect3_cfg_t *cfg );

• waterdetect3_init Initialization function.

  err_t waterdetect3_init ( waterdetect3_t *ctx, waterdetect3_cfg_t *cfg );

Example key functions :

• waterdetect3_get_int Water Detect 3 interrupt pin reading function.

  uint8_t waterdetect3_get_int ( waterdetect3_t *ctx );

Example Description

This example demonstrates the use of the Water Detect 3 Click board by detecting if water is present on the sensor part of the Click.

The demo application is composed of two sections :

Application Init

Initializes the driver and configures hardware for the detection.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    waterdetect3_cfg_t waterdetect3_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.
    waterdetect3_cfg_setup( &waterdetect3_cfg );
    WATERDETECT3_MAP_MIKROBUS( waterdetect3_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == waterdetect3_init( &waterdetect3, &waterdetect3_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    log_printf( &logger, " Turn potentiometer VR1 all the way to the right.\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    log_printf( &logger, " Place a few drops of water onto the sensor.\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    log_printf( &logger, " Turn potentiometer VR1 to the left until the detect LED turns off.\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    while ( WATERDETECT3_PIN_STATE_HIGH == waterdetect3_get_int( &waterdetect3 ) );

    log_printf( &logger, " Device is ready.\r\n" );

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

Application Task

Detects if any water is present on the sensor part.

void application_task ( void ) 
{
    if ( WATERDETECT3_PIN_STATE_HIGH == waterdetect3_get_int( &waterdetect3 ) )
    {
        log_printf( &logger, " Water detected.\r\n" );
        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.WaterDetect3

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.