Yes but there are some requirements...
- AP model = AFAIK only AP39xx have iperf3 installed
- the wirless client must be able to reach the AP IP = the best is to setup a SSID with bridge@AP untagged so both are in the same subnet
Then ssh to the AP and switch in the /usr/bin directory and start the iperf server with "iperf3 -s"
Now you'd need a iperf3 app on the client and start the iperf-client to run the test.
Example below - hardware AP3915i and Amazon Fire D10
AP:
![3fe8d191e7854d3f83c63c1685a621f3_RackMultipart20181102-65200-1c3h2gp-iperf01_inline.png 3fe8d191e7854d3f83c63c1685a621f3_RackMultipart20181102-65200-1c3h2gp-iperf01_inline.png](/t5/image/serverpage/image-id/5718i71F24A5C7BE82047/image-size/large?v=v2&px=999)
Amazon Fire HD10:
![3fe8d191e7854d3f83c63c1685a621f3_RackMultipart20181102-38357-1wp486p-iperf02_inline.png 3fe8d191e7854d3f83c63c1685a621f3_RackMultipart20181102-38357-1wp486p-iperf02_inline.png](/t5/image/serverpage/image-id/3893i4C1F457A4B97F21B/image-size/large?v=v2&px=999)