There are 2 issues here.
On the AP side, most routers hand off correctly IF the APs share the same SSID AND are set to the same channel for all the routers. (So Auto obviously is a non starter), pick the channel wisely. The driver typically compares the RSSI of the same channel to decide which AP to go with. For Ubiquiti hardware "Zero Handoff" basically is a configuration check to make sure both criteria are met.
Apple Airport (RIP) works, so will any router that runs OpenWRT eg Buffalo, Ubiquiti, Cisco etc.
To answer TRD comments. Some Android devices don't have a library bgscan installed properly on the linux side, that would prevent network switching based on the RSSI levels.
Quote:
Originally Posted by Great68
Most commonly, devices will stay with their connected AP until the signal is too weak to be usable even if there's a stronger, they will not automatically switch to whatever AP signal is strongest.
To get that level of functionality, you need routers with "Zero-Handoff" capability. Usually only found in commercial grade stuff. I think some of the higher end Linksys stuff is starting to get that feature.
I have a DLink DIR-880 router in my house (towards the front of my property) and one in my detached Garage (at the rear of my property). When I had them both set up as the same SSID I'd frequently get my laptop automatically connecting to the house over the garage when I was in the garage evident by a really weak and slow (but working) signal.
I now have them set as separate SSID's that I'd manually select depending on where I am, and it avoids that problem.
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