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Networking and servers • Re: Pi 4 on 5 Ghz WiFi can't connect to Pi 1 on 2.4 Ghz

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I don't know where that "study" comes from. I am using the same name for both just because it's convenient for users to have the same SSID and password. The name for both is "mgn".
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"Study" is the name of the router. I'm not sure why the router needs a name.
Since my ISP changed the provided router (wired & WiFi) to one with "dual-band" WiFi I opted (having admin access) to append "-5G" to the SSID of that part but use the same password for both. This helps me, and other family members who have "devices" which can use either one or only one of such know which band they're currently using and whether, for those devices that can use either, one band is suffering from interference/competition from the "neighbours" etc. (Guest access is via a second, "old", 2.4Ghz wireless router with no ethernet "input" "piggy-backed" to the main router). However most of the family's (fixed) devices can/may use a wired connection either directly or via a pair of ethernet - house AC wiring "bridges" so WiFi use is mainly for 'phones, tablets, laptops etc. which often don't have wired ethernet connections.

Trev.
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I used to do exactly as you describe.

When devices and routers got better at selecting the most appropriate band I gave up and just use a single name for both SSIDs.

I decided to leave the Pi 4 on 5Ghz overnight just to see what would happen. The good news is that for the first time in weeks the Pi 4 was able to use scp to copy several hundred JPEGs from the Pi 1. I still have no idea what suddenly caused the problem or why it is suddenly fixed now.

In any event I intend to hard wire the Pi 4 in the hope that this will prevent the problem from recurring.

Statistics: Posted by Ratsima — Mon Jun 16, 2025 11:36 pm



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