Thread: Using TMC in Garmin nuvi for free

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:

Please Login or Register to see the links

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:

Please Login or Register to see the links

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?