I have been having problems with some smart bulbs not being able to hold a steady connection on my 2.4gz radio after upgrading a AX88U router to merlin 386.4 or even factory
3.0.0.4.386.45934. However, after restoring 386.3, everything works fine. Does anyone know what changed in firmware update for the 2.4 GHZ WIFI radio?
Background:
I have 4 TP-LINK LB110 smart bulbs, one KL120, and a HS105 smart plug which have worked flawlessly up until 386.4. However, after upgrading from 386.3 to 386.4, all smart bulbs disconnect several times an hour with “wl0.1: STA MAC IEEE 802.11: disassociated“ and “wl0.1: MAC RADIUS: starting accounting session BCE13EF2E594CE5C” – “wl0.1: MAC WPA: pairwise key” in the system log. As a result, the smart bulbs frequently time out when trying to manage through the KASA app.
I have tried the following troubleshooting steps with no success other than reverting to 386.3 where everything works stable.
1) Problem starting after upgrading router from 386.3 to 386.4 Beta 3 (dirty upgrade, not a full reset). Tried following steps no success:
- Hard resetting bulbs to factory defaults and rejoining guest network.
- Uninstalled several plugins including Skynet, Diversion, YAZI (bulbs were in isolated Guest network).
- Disabled WIFI 6 on 2.4 GHZ radio, changed channel (thought maybe too many conflicts), reduced channel bandwidth to 20 MHZ, ensure WIFI security still WPA 2 for guest, disabled protected frame management, disabled universal beam forming.
- Tried lowering RTS threshold.
2) Upgraded 386.4 BETA 3 to 384.4 final and problems persisted.
3) Did a hard reset on router and re-uploaded 386.4 firmware and still no luck.
4) Did hard rest on router again and did a clean upload of ASUA factory
3.0.0.4.386.45934 and problems persisted.
5) Hard rest router with clean install of Merlin 386.3 and problems went away.
6) The issues returned as soon as I upgraded to 386.4 again.
7) Did dirty downgrade back to 386.3 and all the problems went away. Bulbs are rock solid.
Given the only WIFI clients that seem to be experiencing issues with 386.4 are the bulbs, I was leaning towards an issue with the bulbs that did not get exposed until the latest firmware update. Note I also have two TP-LINK HS200 switches that did not experience any problems (I’m guessing they use different wireless chips). However, it seems like this is a problem isolated between those bulbs and the AX88U as I installed all the same bulbs at my mother’s house, and she has no problem running factory firmware
3.0.0.4.386.45934. I would like to see if TPLINK would be willing to do anything, but I suspect they will point their finger back at the router.