Raspberry Pi Wi-Fi performance boost

[miroslavpetrov]

Hi everyone,

I want to share something (which some of you may already know) about Raspberry Pi's wireless performance.
I recently bought a Pi 3 and I noticed that the ping from my PC to the Pi is around 70-80ms, while all the devices and the router are within 1 meter radius. Also I wasn't able to access domoticz web server(getting domoticz offline page) from the first try, sometimes I had to refresh few times.

It turned out the problem comes from the wireless power management of the Pi, which turns of the Wifi(or switches to low-power mode) when the device is unused for certain amount of time(some forums say 1minute)

if you type

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 iwconfig

in the command line you will get something like:

power management.PNG (12.07 KiB) Viewed 1764 times

You can see whether or not your wireless power management is on.(In my case it is OFF)

To turn it off do the following:

1. Open the file in nano

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sudo nano /etc/network/interfaces

2. add the line:

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post-up iw dev $IFACE set power_save off

at the place showed below

interfaces.PNG (18.37 KiB) Viewed 1764 times

3.Reboot the Pi

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sudo reboot

4.After reboot check the output of

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iwconfig

to see if the Power Management is OFF

After I turned off the power management the ping went from 70-80ms to a stable 4-5ms.

Hope you find the information usefull!!!
PS: Since I am new to the forum, I might not placed the thread at the correct place. Please excuse me for this.

[cobra045]

Thanks for this important information

Cobra

[hammertime]

Thank you so much! I've been struggling with this issue for a few weeks.. now I can use the pi wirelessly.