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.

hi folks, im working on an application for downlink time of difference arrival. im using a DWM 3000 ultrawide band board to send DLTDoA pulses. i have followed the protocol in the FiRA 2.0 spec, and properly implemented the swift api, but im getting issues with the iPhones UWB radio chip(rose). i have no issues if i use another board as a receiver instead of my phone. specifically, im using the SP1 frame format, and am getting errors at the PHR stage. to my knowledge, the 0x18 SECDED error means that the PHR header could not be properly decoded. does anyone have advice on how to debug or next steps? its difficult since i cant get access to lower level logs of the chip to actually see whats going wrong. thanks.