Indoor Wi-Fi Roaming with OpenWRT

A few months after writing up the Cudy AX3000 units and moving the house over to OpenWRT, I ended up revisiting the one bit I had deliberately waved away as “good enough”: roaming. A real house, with a mix of phones, tablets, laptops and a few stubborn IoT things that insist on staying in 2016, has… issues. But they’re not always obvious, and given we’d both upgraded the 5GHz band and changed the locations of the access points, it took a while to figure out where the new rough spots were. If you’re just tuning in, I have a hard split between a legacy 2.4GHz network and the modern 5GHz one. I already had client-managed roaming and basic handoff guidance, but now I added usteer, 802.11k neighbour reports (because hostapd was not cooperating), and things are now pretty much perfect. The long version is below, with anonymised data and enough detail for future me to remember why I did this. Why I Did Not Merge The SSIDsThe obvious advice for roaming is “use one SSID everywhere”, and that…