openwrt / openwrt/mt76

Wrong temp reading on MT7915_phy0

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Dominant language
C
Stars
888
Forks
436
PR merge metrics
No merged PRs in 30d

Description

I did some tests for temp reading. I get the following readings from internal sensors in standby (no devices connected on WiFi) with a room temp of 20C:

phy0 2.4Ghz -> 68C
phy1 5Ghz -> 43C
On the SoC the reading by internal sensor is 45C.

The temperatures detected with a thermal scanner (my bet was 3-4C low) are:
on 2.4Ghz -> 37.1C
on 5Ghz -> 40.5C
On the Soc I get 45.5C.

It seems to me that the temp reading by the sensor on 2.4Ghz chip is not so correct.

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  3. Fork the repository and make your change on a branch.
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Research direction

Start by reproducing the reported MT7915_phy0 temperature readings in standby and compare the 2.4 GHz, 5 GHz, and SoC internal-sensor values with the thermal-scanner measurements listed in the issue. Done means the 2.4 GHz reading discrepancy is explained and corrected, with the reported readings validated again.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
embedded-iot, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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