Function esp_idf_sys::nvs_get_blob

pub unsafe extern "C" fn nvs_get_blob(
    handle: nvs_handle_t,
    key: *const c_char,
    out_value: *mut c_void,
    length: *mut usize
) -> esp_err_t

@brief get blob value for given key

This function behaves the same as \c nvs_get_str, except for the data type.