具有多种服务的Android / iOS蓝牙低功耗（BLE）通信

Question

I have an iOS App advertising two BLE services (both primary ) the following way:

peripheralManager.addService(containingService)
peripheralManager.addService(preciseService)
peripheralManager.startAdvertising([CBAdvertisementDataServiceUUIDsKey: [containingService.UUID, preciseService.UUID]])

I verified with the LightBlue app that both services are advertised.

What I want to do on the Android side is to get a ScanResult for devices advertising the " preciseService ". Filtering for it, the device is never found though. Not filtering at all, the device is found, but in the ScanRecord the method getServiceUUIDs only returns the UUID of " containingService ".

I know that I can find all other Service UUIDs by connecting to it. In my app I do not want to connect to the device though. So my question is if someone knows why only one of the two advertised primary services is found in the ScanRecord?

Thanks a lot

Answer 1

I realized that it was all about the length of two or more 128bit UUIDs being added. Adding one 128bit and one 32bit UUID worked fine.