Changing Wi-Fi Channel

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I see, thank you. From further reading it seems it could be a power-saving measure: on ESP-IDF at least, the default WIFI_PS_MIN_MODEM power state offers reduced power consumption with higher latency, while WIFI_PS_NONE trades off the other way. I don't believe the WiModem provides an AT command for changing this, only AT*MODE for toggling the radio.

It's useful to know that the ping times are not indicative of the true latency in active use.