I'm attempting to create a project wich need to enable a hotspot to connect multiple devices on my RPi throught the 5Ghz wifi band band, at the same time connect the RPi to internet to manage an auto-update system throught the 2,4Ghz wifi band.
I don't want to use the ethernet port, because the final project is more like a smart speakers and i don't want to install it next to my box.
Neither the Bluetooth because of the slow speed limit.
In the RPi 3 and Zero W specifcations, i can read the Wifi is Dual-band, but my friend Google said to me only the 2,4Ghz is active?
What's the reallity? Will i need to connect a wifi dongle to do exactly what i want?
I've already think to an alternative: launch the update manually and automatically do the followings steps: disable the HotSpot, connect to the internet, update, disconnect, enable the hotspot.
But if the update screw up and finally never disconnect and re-enable the hotspot, i'll be forced to connect throught ethernet to re-configure the wifi setup.
Edit : After long search, i found this Docker wich seems tout do the job. Has someone ever tried it?
Thanks for help and excuse me for my poor English