Thread: Using TMC in Garmin nuvi for free

I know this.
But i dont know where to find number 18689, 33, 33, 1?
Where can i find number 18689?
Someone must find this number somewhere and i like to know where he find this

18689 = 4901 hex
compare to TraficProviders.xml, description for Slovenia: cc="9" sid="1" ltn="33"
And look for the same values in nuvi developer menu, TMC tables.

If you have a unit like the nüvi 3790 or similar you can look in "[GPS drive]:\.System\TrafficProvider.xml".

Here's an example with extract of 2 entries from TMC providers in France:

Code:

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V-Trafic (FR):
FID=cc*256+sid=15*256+62=3902 REMARK: It's not always factor 256 for all FID calculations
PID=ltn1=30
RgnID=ltn2=32
VenID, use 1 for insert and 0 for remove

Via-Michelin (FR):
FID=cc*256+sid=15*256+58=3898 REMARK: It's not always factor 256 for all FID calculations
PID=ltn1=29
RgnID=ltn2=32
VenID, use 1 for insert and 0 for remove


Looking here in post #1 you can see the 2 code sets for France

Code:

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It was a year or two since I've tried this calculations. I don't have the complete calculations for all providers but this can be used as a starter for further investigations. The hardest to calculate would be the FID if you don't have a real 25-character unlock key to investigate with [Only registered and activated users can see links. ].


EDIT: Here's some more examples of my own previous investigations.

Sample calculation with Radio SI/TrafficNav (SI)

:Anim3:	State	Type of license	Ltn 1	Ltn 2	SID
Radio SI/TrafficNav (SI)	9	1001	33	33	1
	9=SL	1001 = lifetime
	Formula		Value
FID / MapID	State*2^11+2^8+SID	=9*2048+256+1	=18689		:Animated77:
PID	=Ltn 1		=33
RgnID	=Ltn 2	same as Ltn 1	=33
VenID	(1=insert)	(0=remove)	1

Sample calculation for Destia Traffic TMC (PL)

:111anim:	State	Type of license	Ltn 1	Ltn 2	SID
Destia Traffic TMC (PL)	3	1001	5	5	2
	3=PL	1001 = lifetime
	Formula		Value
FID / MapID	State*2^11+2^11+2^9+2^8+SID	=3*2048+2048+512+2	=8962		:Animated98:
PID	=Ltn 1		=5
RgnID	=Ltn 2	same as Ltn 1	=5
VenID	(1=insert)	(0=remove)	1

Maybe someone could find the pattern for generic calculation of FID values for TMC?

@lolypop000

I don't know the formula for FID in TMC calculations. Just some fragments with PID, RgnID & VenID and where FID is adopted to fit the wanted result. I'm using binary factors (2^?) as fillers so the pattern would be easier to see in possible operations with XOR, OR, AND, BIT-SHIFTs etc.

Code:

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My time is limited to investigate all possible ideas that floats around. I tried to explain the initial seed for the TMC calculations and there has been other explanations earlier in forums that crashed and lost their stuff (eg. **** & erased posts in PPC W**ez).

Originally Posted by Ballebar

I don't have the complete calculations for all providers but this can be used as a starter for further investigations. The hardest to calculate would be the FID if you don't have a real 25-character unlock key to investigate with [Only registered and activated users can see links. ].

Maybe someone could find the pattern for generic calculation of FID values for TMC?

Anyone who is interested and like to do further investigations are welcomed to dig deeper into this problem : anim18):

Thank you for your answer.
I will try to investigate

@lolypop000

Connect your GPS with the GTM TMC device and look in diagnostic pages for further details.

Example:

I see something interesting from your picture.

Traffic_nav(SI) 1001 9/e4/1/33
hex e4 is decimal 228

<country name="Slovenia" cc="9" ecc="228" fmTuningGrid="World">
<boundary desc="slovenia">