Just musing here...
I did ran strace on nickel while going through the connect/disconnect process, because I wanted to see what Nickel was doing during the time it was "connected". Not a lot, it turns out, mostly checking the battery status.
I noticed on the strace that nickel requests a full eink refresh after drawing the 'computer detected'. Maybe one could monitor that as a starting point as to when to start simulating touches...
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