RE: Custom Service UUID : iOS values not as expected

Vidar Berg — Thu, 02 Jan 2020 15:24:00 GMT

Hi,

I suspect might be related to attribute caching since the UUIDs are correctly shown on the Android phone. Attribute caching is an optimization that allows GATT client to remember services across connections, so it doesn't have to repeat the service discovery on every re-connect. You can try to clear the cache by first making sure the device is not displayed in the "my device" list in ios settings -> Bluetooth, then reboot the phone (toggling flight mode enable should have the same effect as well).

There is a good summary of the attribute caching feature in the Bluetooth core specification if you are interested, see vol. 3, part G, section 2.5.2.