Relay 4 Click is a compact add-on board with a general-purpose relay that any host MCU can control. This board features the J1031C3VDC, high-current single-pole double-throw (SPDT) signal relay from CIT Relay and Switch. Highly sensitive, the J1031C3VDC offers a low coil power consumption in a small, lightweight package with PC pin mounting. It comes with a dimension of 12.5x7.5x10 millimetre (LxWxH) and a 1C contact arrangement with a coil voltage of 3VDC, providing a switching voltage of 125VAC/60VDC maximum.
- Author : Stefan Filipovic
- Date : Jan 2023.
- Type : GPIO type
We provide a library for the Relay 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.
This library contains API for Relay 4 Click driver.
relay4_cfg_setup
Config Object Initialization function.
void relay4_cfg_setup ( relay4_cfg_t *cfg );
relay4_init
Initialization function.
err_t relay4_init ( relay4_t *ctx, relay4_cfg_t *cfg );
relay4_set_relay1_open
This function sets the relay 1 to normally open state by setting the RL1 pin to low logic level.
void relay4_set_relay1_open ( relay4_t *ctx );
relay4_set_relay1_close
This function sets the relay 1 to normally close state by setting the RL1 pin to high logic level.
void relay4_set_relay1_close ( relay4_t *ctx );
relay4_set_relay2_open
This function sets the relay 2 to normally open state by setting the RL2 pin to low logic level.
void relay4_set_relay2_open ( relay4_t *ctx );
This example demonstrates the use of Relay 4 Click board by toggling the relays state.
The demo application is composed of two sections :
Initializes the driver and logger.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
relay4_cfg_t relay4_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.
relay4_cfg_setup( &relay4_cfg );
RELAY4_MAP_MIKROBUS( relay4_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == relay4_init( &relay4, &relay4_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
Switches the relays 1 and 2 state every 5 seconds and displays the state on the USB UART.
void application_task ( void )
{
relay4_set_relay1_open ( &relay4 );
log_printf( &logger, " Relay 1 set to normally open state\r\n" );
relay4_set_relay2_close ( &relay4 );
log_printf( &logger, " Relay 2 set to normally close state\r\n\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
relay4_set_relay1_close ( &relay4 );
log_printf( &logger, " Relay 1 set to normally close state\r\n" );
relay4_set_relay2_open ( &relay4 );
log_printf( &logger, " Relay 2 set to normally open state\r\n\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
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.Relay4
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.