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Vasily Evseenko edited this page Apr 13, 2022 · 4 revisions

For patched RTL8812AU driver no any additional kernel patches needed!

For other drivers you may need following patches:

  1. tx power lock (via CRDA).
  2. tx rate for injected packets (obsolete)
  3. tx timeslot patch (for one-way transmit only).

[1] is needed to fix tx power at max supported level and disable CRDA restrictions

[2] enables API for specify bitrate when injecting packets. But for current ieee80211 stack is not sufficient to specify rate in injected header and you also need to set it via iw dev $WLAN set bitrates ht-mcs-5 1 sgi-5 before tx start

[3] removes most of tx timeslot guard intervals to maximize throughput. Use it only if you needed one-directional broadcast of video and telemetry. It is not compatible with two-way telemetry. https://en.wikipedia.org/wiki/Extended_interframe_space

My HW setup is RT3572 (rt2800 driver) and RTL8812AU (https://github.com/svpcom/rtl8812au) in 5GHz band. If you have experience with other HW - pull requests are welcome.

If you have recent mainline kernel (4.x) you don't need [2] (it already here). [1] and [3] are optional and needed only to increase transmit range and channel bandwidth.

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