I manage a Reyee RG E5 (MT7622 CPU for 2.4 GHz radio 0 and MT7915E for 5 GHz radio 1) set up as a dumb AP with three SSID’s per radio. The AP is running 24.10.5. The three SSID’s on each radio are attached to Lan (1), Guest (2) and IOT (3) VLANs. I run the 2.4 GHz radio txpower at 28 dBm (630 mW), which is reduced from the default of 30 dBm (1000 mW).
I’ve reviewed statistics graphs for all wireless SSID’s and best I can guess, a large spike in operating temperature to 88C appears correlated to connection of a third client on the 2.4 GHz radio 0 Guest network - perhaps associated with poor signal quality. No trends on the other 5 SSID’s appear to have any correlation with the temperature spike. Processor usage bumps up from baselines of ~2% and ~5% to ~7% and ~18% on cores 0 and 1, respectively, and CPU frequency is trending around 600 MHz (it can run up to ~1.3 GHz). In other words, the CPU doesn’t appear to be working very hard. Nothing is going on with Bytes/s or packets/s on the interfaces. System load doesn’t look too unusual.
Any thoughts? Don’t worry, be happy? I suppose the CPU will survive an occasional brief run at 88C just fine. I’m just a little surprised at the percentage increase and duration in high operating temperature. Maybe Santa Clause was borrowing the WiFi after a hard days work (it was Christmas day)?
