December 27th, 2012, 06:43 PM
Join Date: May 2010
Location: Riddlesden, West Yorkshire, UK
Device(s): SGS3 (Current)
HTC Desire (Retired)
Carrier: 3 UK
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Its actually pretty easy.
You would be best having 2 separate profiles.
One that sets your silent mode (Date and time context for example) and another that turns off silent mode when text is received..
So first profile called "Sleep" for example.
Second profile has 2 context.
Context 1 - State > Tasker > Profile active > "Sleep"
Context 2 - Event > Phone > Text received
In "Text received" set "Sender" and "Content.
Just tested myself setting a small profile if text received with content "important" task > Vibrate. Worked fine. The task I would suspect would work for you when your second profile was activated would be to turn off silent mode for a few seconds and play a notification but I'll leave those finer points to you. I assumed your question was more related to the triggers.
Please note, the Quotation marks used are for this post onl;y. You dont need to use them in Tasker.