Function esp_idf_hal::sys::esp_now_register_recv_cb

source · 
pub unsafe extern "C" fn esp_now_register_recv_cb(
    cb: Option<unsafe extern "C" fn(_: *const esp_now_recv_info, _: *const u8, _: i32)>
) -> i32
Expand description

@brief Register callback function of receiving ESPNOW data

@param cb callback function of receiving ESPNOW data

@return - ESP_OK : succeed - ESP_ERR_ESPNOW_NOT_INIT : ESPNOW is not initialized - ESP_ERR_ESPNOW_INTERNAL : internal error