esp_idf_svc::hal::sys

Function esp_ble_gattc_register_callback

Source 
pub unsafe extern "C" fn esp_ble_gattc_register_callback(
    callback: Option<unsafe extern "C" fn(_: u32, _: u8, _: *mut esp_ble_gattc_cb_param_t)>,
) -> i32
Expand description

@brief This function is called to register application callbacks with GATTC module.

@param[in] callback : pointer to the application callback function.

@return - ESP_OK: success - other: failed