Library Description

The library has a function to activate the motion sensor and functions to check Movement detection in the vicinity of the sensor.

Key functions:

• void motion2_active ( uint8_t status ) - Functions for active motion sensors
• uint8_t motion2_detect_state ( void ) - Gets detection state

Examples description

The application is composed of three sections :

• System Initialization - Initializes all necessary GPIO pins
• Application Initialization - Initializes the GPIO driver and activates the motion sensor
• Application Task - Checks if an object is detected. Prints a message about the object detection and whether the sensor has stabilized after object detection.
• Note: The sensor needs a maximum of 30s to stabilize. See the sensor technical documentation for more information.

void application_task ( )
{
    uint8_t motion_state;
    
    motion_state = motion2_detect_state( );
    
    if ( ( motion_detect_flag == 0 ) &&
         ( motion_state == MOTION2_DETECT_OBJECT ) )
    {
        mikrobus_logWrite( ">>> Object is detected...", _LOG_LINE );
        motion_detect_flag = 1;
        Delay_ms( 500 );
    }
    
    if ( ( motion_detect_flag == 1 ) && 
         ( motion_state != MOTION2_DETECT_OBJECT ) )
    {
        mikrobus_logWrite( ">>> Sensor has stabilized..", _LOG_LINE );
        mikrobus_logWrite( ">>> Ready for new detection...", _LOG_LINE );
        mikrobus_logWrite( ">>> --------------------------", _LOG_LINE );
        motion_detect_flag = 0;
    }
}

Other mikroE Libraries used in the example:

• UART Library

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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.