element state (eg, button) in custom code

[flexiti]

What is the best method to locally check the status of e.g. a buttonis on or off in custom code?

[fvanroie]

First you need to get the object pointer:

    uint8_t page = 1;   // the page of the object you want
    uint8_t id   = 150; // the id of the object you want

    lv_obj_t* my_obj = hasp_find_obj_from_page_id(page, id);
    if(!my_obj ) return; // object doesn't exist

Then you can use the object pointer to get the state, for example: lv_btn_get_state(my_obj) which will return the current state.

   lv_state_t  val = lv_btn_get_state(my_obj );
   if (val & LV_STATE_CHECKED) {
        // do something
   } else {
        // do something
   }

[flexiti]

Perfect, and it even works ;) Thank you. ps. Can other resources be read in a similar way? e.g. current text from the label - received value from mqtt that is not a castom message

[fvanroie]

Yes, you can use all LVGL apis in this way.