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I recently purchased an Ivation barbecue thermometer which is supposed to be a pretty decent similar build to the Maverick 733 (I believe).  Of course, one of the first things that comes to mind is how to tie this in to some type of IP connected system so I don’t have to rely upon the included receiver and its limited range, and can instead take advantage of wifi, Internet, and the smartphone I always have with me.  Turns out it should be pretty feasible in conjunction with the Raspberry Pi I already have plans to set up as a sort of garage controller.  That device will be connected by ethernet and will have a constant and reasonably close proximity to my smoker and grills already.  This post is for my notes on links that will be useful when (if?) I actually get around to making this work.

Software/code links and notes will come later, after I actually get the equipment to start testing.

About the BBQ thermometers

The Maverick (and presumably Ivation) transmit on the 433.92MHz frequency using OOK.  The Hackaday link to Bob Blake’s article below describes the communications protocols and encoding.


Update 10/9/16

Spent some time trying to get this working with my On Networks N150R over the past couple of days without much luck.  May have to give it a try with one of my Raspberry Pi’s and see if I can get it working there, if for no other reason than to verify that the receiver module I purchased is functional and/or that I have it wired somewhat properly.

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Setting up a PPPoE headend

Posted May 23, 2016 By Landis V

May come in handy.

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Census and Survey of the Visible Internet (PDF)

Posted May 20, 2015 By Landis V

Interesting reading.

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Pretty good board list, including a couple with dual ethernets, which is something I’ve been wanting to have.

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It seems somehow I’ve never managed to run across this particular article describing path MTU discovery (PMTUD) in conjunction with IPSec and GRE tunnels.  Scenario 10 is a particularly good and detailed description of how it can go, even taking into account situations common to PPPoE DSL connections which have an MTU of 1492 (the 1400-byte MTU link in the scenario would have the same effect).

Ran across this one while looking for any documentation/information about AT&T ignoring the DF/”don’t fragment” bit and proceeding to fragment at will, breaking path MTU discovery.  I’d love to find a way to get them to stop doing that on my connections, and just let the protocol work as it is supposed to.

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Integrates with netfilter using QUEUE.  Interesting methodology, potentially quite useful.

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