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How To: Relay Module

With our Relay Module you can easily control high voltage/current circuits. This module is specially designed to consume low levels of power.

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The relay consumes power only when changing state.

References

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In the example, the Relay I2C address is set as TWR_MODULE_RELAY_I2C_ADDRESS_DEFAULT, you can also use TWR_MODULE_RELAY_I2C_ADDRESS_ALTERNATE if you want to use a second Relay Module on one device.

You will just have to solder the 0-ohm resistor to the second position on the Relay Module.

Example

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In the example below, the relay on the Relay Module will turn On/Off every time you press the button on the Core Module or Button Module.

Relay Module Pulse Code Example

#include <application.h>twr_module_relay_t relay;twr_button_t button;void button_event_handler(twr_button_t *self, twr_button_event_t event, void *event_param){    (void) self;    (void) event_param;    if (event == TWR_BUTTON_EVENT_PRESS)    {        twr_module_relay_toggle(&relay);    }}void application_init(void){    twr_module_relay_init(&relay, TWR_MODULE_RELAY_I2C_ADDRESS_DEFAULT);    twr_module_relay_set_state(&relay, false);    twr_button_init(&button, TWR_GPIO_BUTTON, TWR_GPIO_PULL_DOWN, false);    twr_button_set_event_handler(&button, button_event_handler, NULL);}