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I am using the Wi-Fi chip on my board. I've successfully connected to Wi-Fi in the 2.4 GHz band, but for the 5 GHz Wi-Fi band I need to select the channel or band before connecting.

What extra arguments need to be given to the wpa_cli or wpa_supplicant utility so that it will connect to only the 5 GHz Wi-Fi band?

  • Set the 2.4ghz SSID different from the 5.0 Ghz SSID. – Ramhound Feb 24 '15 at 16:10
  • same ssid will work on 5Ghz and as well as on 2.4 Ghz. SO need to differentiate before connecting, so that it will connect to only 5GHz. – pankil Feb 25 '15 at 5:03
  • I am suggesting you make them different. But how you force your adapter to connect at 5 ghz to a dual band network depends on the network adapter in question. – Ramhound Feb 25 '15 at 11:52
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Tobi's answer is almost correct but they're the wrong way around, freq_list can be set outside the network block, but scan_freq can't: https://w1.fi/cgit/hostap/tree/wpa_supplicant/wpa_supplicant.conf#n861

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  • you're right, doesn't make sense to limit the frequencies inside a network block... – Tobi Jan 6 at 9:10
  • it's fixed now, thx – Tobi Jan 6 at 9:16
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You can limit the allowed frequencies in wpa_supplicant.conf:

add this outside of the network block:

freq_list=5500 5520 ... (all frequencies allowed in your country and in the desired band)

or you can also limit the scanned frequencies for a specific network (results in faster scans). Add to the config, inside the network block:

scan_freq=5500 5520 ...

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