It depends on your country, some require personal information and some doesn't... For the latter you still have to provide your street address. Check ANNEX III part A of EU regulation here: https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=15733125...

Look for keystudio respeaker hat for raspberry. I got one for this exact purpose but still haven't got the chance to test it.

Very cool. I see that respeaker has even a 6 mic array for the pi: https://respeaker.io/6_mic_array/

I have the (older, discontinued) 6+1 USB mic array, but I'm in general wary of the ReSpeaker stuff. I have the original ReSpeaker Core v1 hardware as well, and it's incredibly unstable. It comes with a tiny amount of flash that you're supposed to augment with a SD card (which then gets overlayfs'd onto the root filesystem), but the hardware is so buggy that running things from the SD card causes random SIGSEGV and SIGILL all over the place (and yes, I've painstakingly verified that this is not a software issue).

They essentially abandoned development of the v1 line (but appear to still be selling it!) for the v2 line, and I have a hard time trusting them.

Admittedly, I haven't done that much with the mic array I have, mainly because I got burned out dumping tens of hours into trying to get ReSpeaker Core v1 working (which I ended up trashing; it was that bad). I'd like to use it with a Raspberry Pi; hopefully that works out.

Seconding both ReSpeaker and Rhasspy/voice2json, I've been having great luck with that combo. The docs and example code for ReSpeaker are great, very easy to work with.