The https://github.com/NordicPlayground/iOS-Image-Transfer-Demo on iPhone X can't receive complete image data

[chanffdavid]

Hi

I added print on line 245 and on iphone 6 can receive complete image data and display but on Iphone X , iphone X Max the data will stop before image data complete 

https://github.com/NordicPlayground/iOS-Image-Transfer-Demo/blob/master/imageTransfer/Bluetooth/CameraPeripheral.swift#L245

[bjorn-spockeli]

chanffdavid: Please add this as an issue in the GitHub repository so that the iOS developer that maintains it can address it. 

https://github.com/NordicPlayground/iOS-Image-Transfer-Demo/issues

Best regards

Bjørn

[chanffdavid]

Hi Bjørn

Just submitted issues on https://github.com/NordicPlayground/iOS-Image-Transfer-Demo/issues/1

And can you reassign this case to Nordic iOS developer?

Thanks

Best Regards  

[bjorn-spockeli]

The iOS developer is not a part of the Tech Support team, but I have made him aware of the issue. 

Best regards

Bjørn

[chanffdavid]

Thanks Bjørn

But the iPhone X issues seem critical I can't based on current performance to propose the video stream solution to my boss.

Can Nordic arrange more resource to investigate?

[bjorn-spockeli]

The Mobile applications are maintained by the developers through the GitHub repos.

What is the purpose for adding the print statement at that particular line number?

It would help if you could  perform a sniffer trace using our nRF Sniffer v2. Seein the actual on air packets we can figure out why the disconnection occurs. 

Best regards

[chanffdavid]

Hi  Bjørn

bjorn-spockeli said:

What is the purpose for adding the print statement at that particular line number?

The print statement is output the log for show the received data size and base on the log we know the data is not complete.

bjorn-spockeli said:

It would help if you could  perform a sniffer trace using our nRF Sniffer v2. Seein the actual on air packets we can figure out why the disconnection occurs. 

Can the nRF Sniffer v2. work with nrf52 DK ?

Slow down the SPI to "NRF_SPIM_FREQ_125K" to holding the BLE communication back can make the iPhone X receive data complete sometime but this solution still not stable. 

https://github.com/NordicPlayground/nrf52-ble-image-transfer-demo/blob/master/arducam_mini_2mp/ArduCAM.c#L325

iPhone X seem limited BLE 5 data transfer speed. 

Torbjørn have inital the github commit https://github.com/NordicPlayground/iOS-Image-Transfer-Demo/commits?author=mostafaberg 

Can I contact Torbjørn via devzone.nordicsemi.com? 

Thanks 

Best Regards

[bjorn-spockeli]

chanffdavid said:

The print statement is output the log for show the received data size and base on the log we know the data is not complete.

 Ok and removing it does not improve the reliability of the application? I.e. you still see incomplete transfers?

chanffdavid said:

Can the nRF Sniffer v2. work with nrf52 DK ?

 Yes, the nRF Sniffer v2 is supported on the nRF52 DK. 

chanffdavid said:

Can I contact Torbjørn via devzone.nordicsemi.com? 

 Yes, Torbjørn is part of the team that monitors the Nordic DevZone.

[chanffdavid]

bjorn-spockeli said:

 Ok and removing it does not improve the reliability of the application? I.e. you still see incomplete transfers?

Whatever output this log or not, on iPhone X still can't get complete image data

bjorn-spockeli said:

 Yes, the nRF Sniffer v2 is supported on the nRF52 DK. 

Just installed Sniffer V2 and capture samsung S8 (image data complete) and iPhone X (image data not complete) but seem normal attached capture data for your ref.

iphonex.pcapngS8.pcapng

bjorn-spockeli said:

Yes, Torbjørn is part of the team that monitors the Nordic DevZone.

Is this profile ovrebekk is Torbjørn?

[bjorn-spockeli]

chanffdavid said:

Whatever output this log or not, on iPhone X still can't get complete image data

 Ok, just wanted to clarify if the added output log statement caused the app to misbehave or not. 

chanffdavid said:

Just installed Sniffer V2 and capture samsung S8 (image data complete) and iPhone X (image data not complete) but seem normal attached capture data for your ref.

 Yes,I agree. I cannot see anything indicatiing that the notifications from the nRF52 device( i.e. the characteristic with handle 0x000f) is not received correctly. This could indicate that this is an issue inside the application and unrelated to the BLE communication. 

chanffdavid said:

Is this profile ovrebekk is Torbjørn?

 Yes.