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TOMTOM TMC receiver serial data format
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swing
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Joined: Nov 04, 2003
Posts: 2225
Location: Bedfordshire, UK

PostPosted: Mon May 07, 2007 7:10 pm    Post subject: Reply with quote

philpugh wrote:
But aren't the location codes that are being sent from the TMC unit to the nav unit proprietary?
Not just are these location code tables proprietary, these tables are only available having paid a license fee (or entered an agreement to pay per user using the tables).
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clondike
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Joined: May 14, 2007
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PostPosted: Mon May 14, 2007 1:18 am    Post subject: Reply with quote

grazz wrote:
Thanks everyone, i have a table of tmc event codes and lcations so the data will be useful once i've figured out where it is in the stream.

Just an update, i've connected the tmc device to the tomtom unit and i'm sniffing the serial data from both devices on my pc. I can see data both ways, the tomtom then configures the receiver to select classic fm to get the tmc data. The tmc data stream is then more consistant, although its not matching up with the event locations table i have.

I think i will try to hook up the PC directly to the tomtom go unit and fake a repeated tmc data location string, and see what the tomtom decodes it as, hopefully that will help out in my decoding...!

Hi, great work!
I am also experimenting with this TMC device, but unfortunately I have no access to tomtom unit. Could you please post some data samples of communication from tomtom unit to tmc device? Thanks.
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