Library Description

The library covers all the necessary functions to control Signal Relay click board. Signal Relay click
communicates with the target board through the AN, RST, CS and PWM line. This library 
offers functions for turning on or off any and every of the four relays on this click board.

Key functions:

• void signalrelay_relayOneOn(); -  Function turns relay 1 on.
• void signalrelay_relayOneOff();-   Function turns relay 1 off.
• void signalrelay_relaysOn(); - Function turns all relays on.

The application is composed of three sections:

• System Initialization - Initializes GPIO and LOG structures, sets AN, RST, CS and PWM pins as output.
• Application Initialization -  Initialization driver enables GPIO and also starts write log.
• Application Task - (code snippet) This example demonstrates the use of Signal Relay Click board by turning on and then off all four relays.

void applicationTask() 
{
    mikrobus_logWrite( " Relay One Turn On ", _LOG_LINE );
    signalrelay_relayOneOn();
    Delay_ms( 1000 );
    mikrobus_logWrite( "-------------------", _LOG_LINE );
    
    mikrobus_logWrite( " Relay Two Turn On ", _LOG_LINE );
    signalrelay_relayTwoOn();
    Delay_ms( 1000 );
    mikrobus_logWrite( "-------------------", _LOG_LINE );

    mikrobus_logWrite( "Relay Three Turn On", _LOG_LINE );
    signalrelay_relayThreeOn();
    Delay_ms( 1000 );
    mikrobus_logWrite( "-------------------", _LOG_LINE );

    mikrobus_logWrite( " Relay Four Turn On", _LOG_LINE );
    signalrelay_relayFourOn();
    Delay_ms( 1000 );
    mikrobus_logWrite( "-------------------", _LOG_LINE );

    mikrobus_logWrite( " Relay One Turn Off", _LOG_LINE );
    signalrelay_relayOneOff();
    Delay_ms( 1000 );
    mikrobus_logWrite( "-------------------", _LOG_LINE );

    mikrobus_logWrite( " Relay Two Turn Off", _LOG_LINE );
    signalrelay_relayTwoOff();
    Delay_ms( 1000 );
    mikrobus_logWrite( "-------------------", _LOG_LINE );

    mikrobus_logWrite( "Relay Three Turn Off", _LOG_LINE );
    signalrelay_relayThreeOff();
    Delay_ms( 1000 );
    mikrobus_logWrite( "--------------------", _LOG_LINE );

    mikrobus_logWrite( " Relay Four Turn Off", _LOG_LINE );
    signalrelay_relayFourOff();
    Delay_ms( 1000 );
    mikrobus_logWrite( "--------------------", _LOG_LINE );
}  

Other mikroE Libraries used in the example:

• UART

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