WiFi strength incorrect

[ping-localhost]

I don't think anything should be able to have over 100% WiFi strength.

WiFi strength

SSH output:

/home/yi-hack-v5 # cat /proc/net/wireless
Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
 face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
 wlan0: 0000   82.  -59   -83        0      0      0      0      0        0     

System details

[alienatedsec]

@ping-localhost yes, I mentioned the same in the release. It looks like I could fix it easier with your output, but it won't be the same for other cameras.

[murphymorph]

cat /proc/net/wireless returns different ranges on the cameras. 0-100 on YI Outdoor and I suspect 0-70 on others. On YI Outdoor iwconfig return a value of X/100 for the link quality. Probably on other cams there is a similar output like 70/70. I can't verify the output, because I only have a YI Outdoor.

Then the percentage could be calculate like this iwconfig 2>&1 | grep Quality | sed -e 's/.*Link Quality=\([0-9]*\/[0-9]*\).*/\1/' | awk -F/ '{FS="/"}{print $1*100/$2;}'

https://github.com/alienatedsec/yi-hack-v5/blob/02c1ebe4aebe391c98db09d12e84d1a6584753ed/src/www/httpd/cgi-bin/status.json#L40

[alienatedsec]

cat /proc/net/wireless returns different ranges on the cameras. 0-100 on YI Outdoor and I suspect 0-70 on others. On YI Outdoor iwconfig return a value of X/100 for the link quality. Probably on other cams there is a similar output like 70/70. I can't verify the output, because I only have a YI Outdoor.

Then the percentage could be calculate like this iwconfig 2>&1 | grep Quality | sed -e 's/.*Link Quality=\([0-9]*\/[0-9]*\).*/\1/' | awk -F/ '{FS="/"}{print $1*100/$2;}'

https://github.com/alienatedsec/yi-hack-v5/blob/02c1ebe4aebe391c98db09d12e84d1a6584753ed/src/www/httpd/cgi-bin/status.json#L40

Thanks @murphymorph I tried that option before you suggested and as much as it is an easy fix for some cameras, others will show 100% regardless of the signal strength or quality

          Link Quality=100/100  Signal level:-40 dBm  Noise level:-71 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

[murphymorph]

ok... another try :) I found a simplified calculation based on the signal level.

cat /proc/net/wireless | awk 'END { if ($4 <= -100) { print 0 } else if ( $4 <= -50) { print (($4 + 100)*2) } else {print 100} }'

I took this from here on Stackoverflow This could be sufficient as a rough assessment of the signal quality.

[ChenchaoZhao]

yi dome wifi strength is only 7%

[g1za]

I moved to yi-hack-5 from 4. 142% wifi strength, Yi dome. Let me know if there is any command I can run on my camera (and how) to debug this.

[github-actions[bot]]

This issue has been stale for 30 days - it will be closed within the next 7 days if not updated

[alienatedsec]

Pull request #265 is still to be tested

[alienatedsec]

After so many years and multiple attempts, I still cant get my head around it. So, it works for a while and goes back to over 100% figures

[young747]

Camera Details-

Firmware Version 0.3.9 Baseline Firmware Version 0.3.8 Base Version 2.1.0.0E_201809191630 Model Suffix yi_home_1080p Hardware ID 48US

bug --- dispalyed 142% wifi strength, Yi Home 1080p

status.json ( /tmp/sd/yi-hack-v5/www/cgi-bin/status.json )

WLAN_STRENGTH=$(cat /proc/net/wireless | awk 'END { if ($4 <= -100) { print 0 } else if ( $4 <= -50) { print (($4 + 100)*2) } else {print 100} }')

all.js ( decompress /tmp/sd/yi-hack-v5/www/js/all.js.gz )

;a=parseInt((parseInt(h.wlan_strength)*100)/70)

level(dBm)	calculated WLAN_STRENGTH( % )	WebUI WiFi Strength_icon
>= -50	100	strong
-51	98	strong
-52	96	strong
...		strong
-60	80	strong
...		medium
-70	60	medium
...		medium
-80	40	medium
...		weak
-90	20	weak
...		weak
<= -100	0	weak

[How to fix] Not needed calculation at the all.js.gz, because of calculated with WLAN_STRENGTH(%) at the status.json

• Edit all.js ( gzip -d all.js.gz )

replace

 ;a=parseInt((parseInt(h.wlan_strength)*100)/70

with

 ;a=parseInt(h.wlan_strength)

• Compress all.js ( gzip all.js )
• Reboot
• Connect WebUI ( Cache clear or Ctrl+F5 key)

Therefore, seen WiFi Strength from 0 to 100%

[alienatedsec]

I can't believe I will say this - fixed with 0.4.0d - thanks @young747

If anyone could also check and confirm, I will close this issue after so many years 👍

[g1za]

Just updated to v. 0.4.0 and so far (following a cache clean) the WiFi signal strength is shown correctly (0-100 %). Thanks both!

-- yi dome camera