CButton::add_custom_cb() method

Syntax

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Summary

Declaration

Definition

from iot_button.h:210

esp_err_t add_custom_cb(uint32_t press_sec, button_cb cb, void* arg);

Implemented in button_obj.cpp:33

Arguments

Argument

Description

press_sec

the callback function would be called if you press the button for a specified period of time

callback function for "PRESS" action.

arg

Parameter for callback function

Return value

- ESP_OK Success - ESP_FAIL Parameter error

Notes

Button callback functions execute in the context of the timer service task. It is therefore essential that button callback functions never attempt to block. For example, a button callback function must not call vTaskDelay(), vTaskDelayUntil(), or specify a non zero block time when accessing a queue or a semaphore.