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I've done something similar, but didn't like the static passwords. My guest wifi password is the current date, in YYYY-MM-DD format, it's been a great way to keep my guests (mildly) satisfied. The format changes on occasion

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Is this automated or do you need to change every time Guests are expected?

This is automated, with a shell script and DDWRT

So guests who stay overnight have to enter a new password after your script runs at 00:01?

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