https://github.com/espressif/esp-dsp/blob/master/modules/dotprod/include/dspi_dotprod.h is the only info I found. It might be the sum of the pixel-by-pixel product. If the image pixels are signed, between -1 and 1, the result might be a correlation between the images...negative total if most pixels ...

https://github.com/espressif/esp-idf/pull/1668
and
https://github.com/espressif/esp-idf/co ... efac24f015
seem to reference this.

I'm pretty sure the callback only happens when the time has been correctly parsed from the time server. sntp_set_time_sync_notification_cb(time_sync_notification_cb); Until the callback happens, assume the time has not been set. The callback will be called periodically. By default it seems to be onc...

Thanks! Pretty sure the IPv6 call should use AF_INET6: inet_ntop(AF_INET6, &addr.sin6_addr, ipstr, sizeof(ipstr)); I wanted to understand the [3] for the IPv4 call, here's some info: https://datatracker.ietf.org/doc/html/rfc4291#section-2.5.5.2 : IPv4-Mapped IPv6 Address A second type of IPv6 addres...