[Commotion-admin] [luci-commotion] NanoStation M5 - WiFi power level incorrect in LuCi (#446)

[Andy Gunn]

Okay - I did a little more digging.

A NanoStation M5 unit has a maximum output power of 27dBm at MCS0 or MCS8:
![nanostation m5 power levels](https://cloud.githubusercontent.com/assets/6462133/5303500/1a84be92-7bb8-11e4-94a7-f4148762c3dd.png)

In the Ubiquiti AirOS software, you can select the power level up to 27dBm, as you would expect (this is a maximum value, so it will automatically scale down for higher MCS levels):
![ubiquiti_airos_power_levels](https://cloud.githubusercontent.com/assets/6462133/5303522/38239d88-7bb8-11e4-82af-d1720e5b1dd2.png)

In OpenWRT (Barrier Breaker, I downloaded the most recent release), you can select 27dBm as a possible power level output:
![openwrt nanostation m5 27dbm](https://cloud.githubusercontent.com/assets/6462133/5303533/4bf5d09c-7bb8-11e4-8bdf-78ecd0f673ef.png)
* First issue: you can also select 35dBm output (i.e. 3.2 watts), which is physically impossible for the NanoStation.
* Second issue: when selecting some channels, possibly randomly, LuCi will tell you that the selected value is invalid and set the power back down to 22dBm - the same maximum power that is being reported in Commotion.

@jheretic @dismantl - I would love to see some more testing on this - what do y'all think?

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Reply to this email directly or view it on GitHub:
https://github.com/opentechinstitute/luci-commotion/issues/446#issuecomment-65677569
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