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Control a knob on a Honeywell fan via ESP8266

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StealthRT

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Hey all I am wondering what all I would need in order to control this knob on my Honeywell 2-in 1 Air Circulator Fan, HT-9700

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I am wanting to use a ESP8266 in order to control it via wifi. I know how to do it on that side but I am unsure what's available for the other side (the knob) in order to "turn" the knob or hook into the knob wires.
 
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OK So here it is:

BROWN wire = Low fan speed

RED wire = HIGH fan speed
BLACK wire = HOT

With the black prob on BLACK and the red prob on RED with the fan ON/HIGH I get: 09.9

With the black prob on BLACK and the red prob on BROWN with the fan ON/LOW I get: 00.0
With the black prob on BLACK and the red prob on RED with the fan OFF/OFF I get: 124.4
With the black prob on BLACK and the red prob on BROWN with the fan OFF/OFF I get: 124.4

Note I am using the AC mode on my multi meter that looks like this:
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