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blesh
New Contributor I
970 Views

changing wifi's transmission power (lowering it).

hi everybody

I want to execute little experiment, at an ad-hoc network.

I own few Edisons (Arduuno extantion board)

The algorithm deals with changing transmission power of every node/

I've tried to look at the Edison WiFi guide but didn't find nothing (maybe 7.1 Disable power management (http://download.intel.com/support/edison/sb/edison_wifi_331438001.pdf# page=44&zoom=auto,70,637 http://download.intel.com/support/edison/sb/edison_wifi_331438001.pdf# page=44&zoom=auto,70,637) ).

Does anyone knows about this feature?

Thank you all very much

barlesh

6 Replies
Sergio_A_Intel
Employee
66 Views

Hi,

What feature specifically, the feature to disable power management? Is your goal to disable power management or just change the transmission power? Were you able to successfully follow the steps on the guide?

Sergio

blesh
New Contributor I
66 Views

hi tnx for fast reply

I Dont really knows what disabling power management will give me (because i dont know what it is manage ).

My finel goal is to lower trans power, so if there are some distance between two Edison, they will communicate at the high power and wont communucate when I'll lower it.

barlesh

Sergio_A_Intel
Employee
66 Views

You can edit the power settings using the iwconfig command. For example, to change the Tx-power to 15dBm instead of the 31dBm default value you'd have to write the command iwconfig wlan0 txpower 15. You can test that the changes applied if you check iwconfig again. See more information on the iwconfig command here http://linuxcommand.org/man_pages/iwconfig8.html iwconfig If you want to make these changes permanent you'd have to make a service similar to the one in section 9.3 of the Wi-Fi guide, but instead of declaring ExecStart=/sbin/iwconfig wlan0 power off in the service, do something similar to ExecStart=/sbin/iwconfig wlan0 txpower 15.

I haven't tested if just changing these Tx-power values actually lowers the transmission power. Give it a try and let me know your results.

Sergio

blesh
New Contributor I
66 Views

I'll check it day after tommorow (also for permanent changes) and reply back.

thank you very much

BarLesh

VVela
New Contributor I
66 Views

Intel_Alvarado

What is the upper power limit we can set the wifi transmission to be?

Sergio_A_Intel
Employee
66 Views

Hi H_E_L_P,

Take a look at /message/358665# 358665 https://communities.intel.com/message/358665# 358665 . There you'll find the max output Tx values.

Remember, in case you need to ask a question please create a new thread and avoid reopening old threads.

Sergio

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