I change the code as How to change transmit interval link said.(Modify wiced_bt_cfg_settings struct then wiced_bt_start_advertisements). I test set 1s interval firstly and 10s interval then. But I don't know is 10s set success. I confirmed with scan function device(this function can list all the scanned devices). I think 10s should be more hard to be scanned than 1s. But test result is same. I don't know how to confirm now. Do you have any suggestion?
One way to check if your device is advertising or not is to refresh the scanning list after 10s when you keep the interval as 10s. You can use CySmart app to check that.