Increase Wi-Fi TX Power

Kladderadatsch · January 12, 2018 at 8:38 AM

kszaq , GDPR-2

I have 2 Beelink MXIII II boxes:

1. with Libreelec 8.2 (8.2.2.3) -- Wifi is working very well, good signal strength: Tx-Power=15 dBm

2. with Libreelec 9.0 Alpha (8.90.1) -- Wifi has a very low signal strength: Tx-Power=12 dBm

Is there a way how i can change the value of tx-power? I would like to increase it to 15 dBm in the 9.0 alpha build.

Thanks in advance!

GDPR-2 · January 12, 2018 at 1:52 PM

There should be no difference, its using the exact same driver

Kladderadatsch · January 13, 2018 at 4:33 AM

Strange,

Code

Libreelec 8.2:

Beelink02:~ # iwconfig
wlan0     Qcom:802.11n  ESSID:"xxx"
          Mode:Managed  Frequency:5.24 GHz  Access Point: 34:31:C4:F7:A7:5A
          Bit Rate=0 kb/s   Tx-Power=15 dBm
          RTS thr=192000 B   Fragment thr=8000 B
          Encryption key:8580-EA9F-C926-D335-A5FB-1397-2D82-8541 [2]   Security mode:restricted

Beelink02:~ # iwlist txpower
wlan0     unknown transmit-power information.

          Current Tx-Power:15 dBm       (31 mW)

Beelink02:~ # iwlist wlan0 txpower
wlan0     unknown transmit-power information.

          Current Tx-Power:off


Libreelec 9.0 Alpha:

Beelink01:~ # iwconfig
wlan0     Qcom:802.11n  ESSID:"xxx"
          Mode:Managed  Frequency:5.24 GHz  Access Point: 34:31:C4:F7:A7:5A
          Bit Rate=0 kb/s   Tx-Power=12 dBm
          RTS thr=192000 B   Fragment thr=8000 B
          Encryption key:7D3F-BE54-E4C8-CFAB-7C54-2CB0-E0DD-11C0 [3]   Security mode:restricted

Beelink01:~ # iwlist txpower
wlan0     unknown transmit-power information.

          Current Tx-Power:12 dBm       (15 mW)

Beelink01:~ # iwlist wlan0 txpower
wlan0     unknown transmit-power information.

          Current Tx-Power:12 dBm       (15 mW)

Display More

GDPR-2 · January 13, 2018 at 4:35 PM

It could be that the wireless-tools package was upgraded, I would not trust any figures read in there, the only way to monitor power levels accurately is with another device.

Kladderadatsch · January 17, 2018 at 7:59 AM

Thanks for your answer, but my router confirmed the output of wireless-tools.

8.2.2.3: signal strength: 59% max. data rate : 433 / 433 Mbit/s current data rate: 150 / 150 Mbit/s
8.90.2: signal strength: 13% max. data rate : 433 / 433 Mbit/s current data rate: 72 / 27 Mbit/s

**kszaq** · January 17, 2018 at 8:23 AM

The reason is that my builds use 1.0.0-3 firmware and build from GDPR-2 uses 1.0.0-4 which is known to cripple WiFi performance.

Compare:

LibreELEC.tv/package.mk at libreelec-8.2 · kszaq/LibreELEC.tv · GitHub

LibreELEC.tv/package.mk at master · LibreELEC-AML/LibreELEC.tv · GitHub

GDPR-2 · January 17, 2018 at 8:56 AM

Quote from kszaq

The reason is that my builds use 1.0.0-3 firmware and build from GDPR-2 uses 1.0.0-4 which is known to cripple WiFi performance.

Compare:

LibreELEC.tv/package.mk at libreelec-8.2 · kszaq/LibreELEC.tv · GitHub

LibreELEC.tv/package.mk at master · LibreELEC-AML/LibreELEC.tv · GitHub

I'm sure when I submitted that to LE that I did a diff and there was no difference in the binary contained inside the deb file and the one inside the source file. I will look at this again later.

**kszaq** · January 17, 2018 at 9:10 AM

IIRC linode hosts the latest firmware binary which is 1.0.0-4. You may have compared it earlier and it matched but when they updated deb from 1.0.0-3 to 1.0.0-4, tar.gz was also updated without changing file name. I can repack 1.0.0-3 deb to tar.gz and put it in my sources so that LE master package.mk can be updated with 1.0.0-3.

GDPR-2 · January 17, 2018 at 5:23 PM

Quote from kszaq

IIRC linode hosts the latest firmware binary which is 1.0.0-4. You may have compared it earlier and it matched but when they updated deb from 1.0.0-3 to 1.0.0-4, tar.gz was also updated without changing file name. I can repack 1.0.0-3 deb to tar.gz and put it in my sources so that LE master package.mk can be updated with 1.0.0-3.

That would be great if you could, it would save me doing it

**kszaq** · January 17, 2018 at 5:37 PM

I will do this later today with a PR to LE master.

Edit:

GDPR-2 Done: qca9377-firmware-aml: change firmware version to 1.0.0-3 by kszaq · Pull Request #2420 · LibreELEC/LibreELEC.tv · GitHub

Kladderadatsch · January 20, 2018 at 5:56 AM

Thanks for the fast fix!

With "LibreELEC-S905.arm-9.0-devel-20180120010537-r27931-g2eb14113c.tar" , my problems are gone.

Increase Wi-Fi TX Power

Similar Threads

[8.90.6] LibreELEC 9.0 Alpha for S905/S912 devices