hi folks,
hobbyist here working on developing with DL-TDoA on ios.
i was trying to find the DL-TDoA interoperability spec online at https://developer.apple.com/nearby-interaction/.
but its missing from the latest one for iOS 27 preview. (R6)
when do we expect to have access to an interoperability spec?
thanks.
I was trying to find the DL-TDoA interoperability spec online at https://developer.apple.com/nearby-interaction/.
Based on this:
"The supported anchors as well as the framework’s anchor-interaction comply with the IEEE 802.15.4z standard."
...I'm not sure it has (or needs) its own interoperability specification.
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Kevin Elliott
DTS Engineer, CoreOS/Hardware
Hi,
we’re working through this too, using QM35 anchors with an iPhone 16 Pro on iOS 27. Apple’s logs show discovery information being received, followed by RangingStarted, then FatalChipError and a suspension for ErrorHandling.
The firmware report contains:
ASSERTION FAILED: hmd.c:5723: nchains_enabled >= 2, 0, 0
The app receives no measurements. We’ve reproduced this after rebooting and with the anchors stopped but BLE discovery still active. Is there an infrastructure-side discovery example we could compare against? What would you recommend checking next to distinguish a configuration issue from a phone-side failure?
