My apologies if this question is not appropriate to DevZone, but I am supposing there may be some relevance, and possibly someone with a similar problem.
I have made a web-app that commands a nrf52840 dongle.
Everything seems to work as expected when the web-app is running in a Google Chrome browser on several different Android phones, and on OSX on a MAC mini.
But the only IPhone ( that I have limited access to) is an iphone 8 running ios 13.2.2. This cannot discover my nrf52840 dongle.either from my app in Google Chrome browser, or from settings/bluetooth.
But nrfConnect running on that phone discovers my nrf52840 dongle without any problem that I am aware of.
The code for the Dongle was built using SES, DK 16.0.0, s140 7.0.1 . The security mode is set to OPEN for both read and write. I am aware that ios may insist on encrypting the link, but I am assuming that the Peer Manager will be able to negotiate a satisfactory level of encryption, and anyway. the problem is not reading and writing. The iphone does not get to that stage, it cant even discover my nrf52840 dongle from settings/bluetooth.
This may well be a problem with that particular phone, but I raise this issue in case anyone can suggest something I have overlooked.
I hope to try another iPhone, but I dont have one, and may not have access to one for quite a while.
Please feel free to ignore if judged inappropriate.
Don