There's also much more recent research where you can actually track the position of people by the changes to the Wifi signal. Passive monitoring only, no device involved. See https://github.com/Saad-Imtiaz/WiFi-Sense for example (first thing I found by looking up now, never tried myself).
Yeah that makes more sense than wifi or Bluetooth. It's probably more of a guarantee than a hard limit on only detecting iPhones. The list of devices with UWB support show all iPhone models since the 11 (except e models) but for Android, it's mostly just the pro/plus/ultra versions of the flagships.
Sure (I already worked with lidars before they were in phones ;-)), I had just understood that the proposal was to just not sign the images coming from a flat surface like a screen, which of course can have unintended effects.
> Modem vendors continue to build on AT. If you look at LTE modems made for IoT applications, for example, it's common for them to provide a complete HTTP implementation (and sometimes MQTT, and sometimes some kind of proprietary message broker protocol) accessible via AT commands. That means you can implement an IoT device without a network stack at all, deferring all network operations to the modem itself. With a JSON-over-HTTP backend, for example, you might send AT commands with JSON payloads over the serial control channel and then get JSON back. You never interact with the network at all, the modem is a completely self-contained system. At the extreme, you might implement your entire device using exclusively the modem. This is a common approach for telematics devices like GPS trackers: they consist of nothing but a cellular modem, the telemetry application is built for the modem using an SDK from its vendor, and you interact with it using AT commands. IoT-class modems frequently provide GPIO and user flash for just this purpose.
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