I'm having an issue which I think may be related to wifi link speeds and am looking at methods to troubleshoot it. I have 16 ESP's connected to a Nanostation LocoM2 and 3 of them that are giving me the same problem. When pinging the units, most come back with consistent pings. On 3 of them however, they will ping consistently for a few packets then begin inducing drastic delays every other packet. For example, 4ms, 5ms, 4ms, 1260ms, 10ms, 1600ms, 20ms, 1300ms, etc.... I was able to get consistent performance by lowering the max speed of my AP, however I'm looking for how to troubleshoot this and verify what may be going on with the ESP module itself. Is there a way to get retry info from lower in the stack or logging on what's going on at the link layer? I plan on sniffing it as well, but troubleshooting on the ESP would be ideal. Also, is there any way I can get the negotiated speed or set it wifi speeds manually?