Using TMC in Garmin nuvi for free

**rene.dare** · 21st July 2011, 11:48 PM

Originally Posted by rene.dare

Nice one!

I tried on my Nuvi 1450T and it seems to work. However, sometimes the GPS device gets tuned on the 96,1 MHz frequency which is Maplink and not Navteq.
Another strange thing is that it shows a lot of traffic info from Rio, Porto Alegre, but a lot less from Sao Paulo (where i live).

In time: I believe this is caused by the FM GRID, which is US in my Nuvi.

Is there any way to change the FM GRID to Brazil?

**pu2nnf** · 22nd July 2011, 02:47 PM

Brazil Code:

Provider Navteq (Br)
Area: Sao Paulo, Rio de Janeiro, Belo Horizonte
2823, 0, 0, 1
2823, 14, 14, 1
2823, 15, 15, 1

does it have one for Brazil?
this does not work with the 765T gtm21

**Dioni21** · 22nd July 2011, 10:41 PM

Originally Posted by angelozip

Brazil Code:

Provider Navteq (Br)
Area: Sao Paulo, Rio de Janeiro, Belo Horizonte
2823, 0, 0, 1
2823, 14, 14, 1
2823, 15, 15, 1

Could not make it work in Rio.

I have generated all 3 codes for my nuvi 765T, and it accepted them. But after a full day waiting, it has not yet been activated

Any suggestion to help debug?

**angelozip** · 23rd July 2011, 05:03 PM

Officially only GTM26 are compatible with the system in Brazil, but we are working for at least the GTM 25 and above work. These keys are provisional. They were deduced by logical approach, but has many limitations. For while they serve only as tasting. Once I have a stable solution post here.<br>

**catymag** · 24th July 2011, 07:27 PM

New parameters for TMC Brazil NAVTEQ Traffic (BR) (FID now 5 digits)
These work better than the old ones. The new parameters are:
31495,14,14,1
and
31495,15,15,1

added in first post

**Dioni21** · 24th July 2011, 07:55 PM

Originally Posted by angelozip

Officially only GTM26 are compatible with the system in Brazil, but we are working for at least the GTM 25 and above work. These keys are provisional. They were deduced by logical approach, but has many limitations. For while they serve only as tasting. Once I have a stable solution post here.<br>

Sorry if this is a stupid question, but what is the difference with, say, GTM20 (which come with 765T)? Did the FM encoding change or something like that? Is there an URL with their specs?

**angelozip** · 25th July 2011, 03:31 AM

Contrary to official information from Garmin that only GTM26 and above would be compatible with Traffic in Brazil, we can find the correct parameters (post 227) and proved that other types of receptors, such as GTM25 and above, also work perfectly. Lower versions have not yet worked, but the next days we will have more certainty from numerous tests. The compatibility issues seem to be connected to the operating system of GTM20/21, who do not read correctly the parameters of the signature.
.

Mutt_VB · 1st August 2011, 01:50 AM

Newbie here with a question after reading this thead and trying multiple times to enable traffic.

I have a kenwood DNX 5140 with a GTM-10 attached. The basis subscription has run out and I am trying to enable one from here. I have used JetMouse 1.5 to create a key and It still does not work. can anyone point me to a good guide?

**angelozip** · 1st August 2011, 04:17 PM

Depending on the country, the parameters for the keygen does not generate valid signature for GTMs below the 25 series, such as codes of Brazil, which means that GTMs 10.12, 20.21 .. are not compatible ..