Thread: Using TMC in Garmin nuvi for free

Originally Posted by Lolypop00

Anybody found out how can we erase subscription from GTM antenna?
If you add 15 subscription in GTM25 you cant add no more subscription.
If you create key with jetmouse with 0 on the end this only disable subscription but wont delite and if you try add new subscription,you cant.
If you create key for the same subscription where you add 0 at the end and now add 1 you have back this subscription.
So if you add 0 on all 15 subscription and you try to add new subscription,you cant, becouse your GTM antenna is full, but you can enable back all this 15 subscription if you add 1 on the end.
Anybody know how can we full erase all subscription from antenna?

Loly, my friend, unfortunately I do not have the answer, but only the most doubts about their conclusion that the only signatures are hidden using the parameter 0 in the keys of JM. Why you have failed to insert new signatures JM theoretical limit after the 15 keys, you concludes that they were not deleted, only stayed hidden. However, in the tests that I've just done with my GTM 25 (and also with the GTM 36) noticed that both supported 24 and 23 signatures (did not get to test more limits due to lack of patience) and also have not had any difficulties in remove-hide them with the 0 parameter of JM. Indeed in gtm25 has 27 individual subscriptions, but the firmware groups some of them, such as the USA and Mediamobile as being only one In the GTM 36 is almost equal: individual 27 but that showed only 23 with groupings of Navteq Br, Mediamobile, a curiosity to discuss. In short, I have many doubts about his conclusion that the signatures were only hidden and not been deleted, maybe the problem of overflow is another conflict between parameters, problem in the firmware of your GTM25, etc..Detailing a bit my tests, I would say that the discoveries of the wildcards parameters of Europe and Australia by Loly and the important tests of Neil, encouraged and facilitated f my job In relation to the GTM 25, he has endured 24 signatures (in 3490), as shown in the pictures, but this number may be higher, no doubt. Notice how the ecc parameter appears correctly in GTM25. With this receiver, the Traffic certainly works in their respective countries of signatures with the vast majority of gps. I also tried the GTM 25 on a nuvi 1390T and all 24 signatures were present, ie, the amount of signatures has no relation to the GPS firmware, what seems obvious. Also I have not had any difficulty in removing them. With the GTM 36 also I was able to quickly install 23 signatures (Europe, Australia ...). Also not had any difficulty in deleting subscriptions. Very curious as well is that the Joker 132, 0, 0, 0 also deletes subscriptions that have different parameters, as in the case of Slovenia with parameter 18689, 33, 33, 1 that I had previously installed on my GTM36. The explanation seems to be that any new signing with PID (and SID?) equal about writes that this installed, according tests I did previously (needed more tests). The PID plus the SID are one of the parameters used to deduce the signature key generators. It is a relationship that we can deepen.. An alert to friends in Europe who have official signatures installed on their receivers: do not do these tests with JM and Jokers 132, 0, 0, 1 at GTM 26 and 36, because their original signatures will be overlap, you will lose the official signature and, worse, the traffic will no longer work if you have gps 34, 35xx, 24x 5, 25x5 ...Now some speculation and suggestions on the problem of overflow of Loly: 1. it would be interesting to find out if there is any way to reset the fw of the gtm to factory default 2. Trying to install an older version of firmware in the gtm25, normally a gcd file that can be installed by the webupdater. 3. a way likely, but a bit risky, would delete the region get the signatures. . To this end it is necessary to know where is this region, it seems that no one has yet discovered. In the absence of another idea, to discover this region one can use a possible method: make a full backup of the regions with the cable connected to gps and energized and then another full backup without the cable. By deleting could perhaps identify the region of GTMxx and from there look for signatures. 4. can try to unmount (disassemble) some GTM25 update file to look for commands in it and where will be written. To get these files just make upgrading a virtual gps with garmindevice.xml that all GTMs update files will be there. 5. Finally, it would be desirable to contact the Jet, because surely he could confirm whether or not this issue of overflow of signatures..
p.s: I could not insert the last image of gtm25 in the 1390T 24 to confirm the 24 signatures, but I can do this in another post, if they want to ...

[Only registered and activated users can see links. ][Only registered and activated users can see links. ][Only registered and activated users can see links. ][Only registered and activated users can see links. ]