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Post by EVangelist on Oct 22, 2015 15:53:34 GMT 11
I've often wondered physically where in the Leaf the telematics module is located, and is it possible to take it out and change the SIM? I assume it is not carrier locked to Telstra, so another SIM should work in it. Does anyone know?
This is in the context of 2G shutdown. Telstra is closing 2G from 1 December, Optus 4 months later. I could pop in an Optus SIM attached to my data sharing plan, and get another 4 months of telematics at no extra cost (incremental 2G data volumes would be tiny).
I believe that Nissan is allegedly considering what to do about this, but I don't want to put all my faith in them coming up with a solution, and I expect any "solution" they have may have a big price tag attached (e.g. replacing the existing module with a new 3G or 4G one). If a SIM change is possible, that at least keeps us going for a bit longer using Optus (and possibly Voda - they have made no announcement on 2G shutdown).
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Post by gabzimiev on Oct 22, 2015 16:14:16 GMT 11
I assume that Nissan has it's own private APN on the telstra network. so you would need to somehow change the APN settings as well.
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Post by duncan on Oct 22, 2015 17:13:11 GMT 11
according to Nissan the SIM card seems to live in the Telematics Control Unit (TCU). THis is a pic of it's location from the US 2011 Leaf manual, so turn it upside down and that should help you find it
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Post by EVangelist on Oct 22, 2015 23:54:42 GMT 11
I assume that Nissan has it's own private APN on the telstra network. so you would need to somehow change the APN settings as well. That's an interesting question - I don't know how common it is for a single company to have its own APN, they are usually more generic than that (one APN per class of user, for example). And if they do have a dedicated APN, would the Carwings server refuse a connection from an Optus APN? And if I configured the Optus SIM with the Telstra APN, would connection even be possible? And with some googling, I found a thread in a US forum that says the SIM card has a PIN on it. That PIN would be programmed in to the TCU - so would a SIM without a PIN still work (since we wouldn't know the PIN programmed in to the TCU to replicate it on the Optus SIM)? So many questions... but I'm tempted to actually try this!
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Post by gabzimiev on Oct 23, 2015 10:48:02 GMT 11
depends on the size of the company i guess: hunter water, state water, sydney water, broadcast australia etc.. all have their own private APN but they also care a lot about keeping the general public out. If jeep used there own APN this hack wouldn't of been possible the way it was done www.wired.com/2015/07/hackers-remotely-kill-jeep-highway/ telstra has 4 standard APNs telstra.interent,telstra.wap, teltra.extranet and telstra.corp. internet and wap give you a NATed IP address extranet gives you a public ip address. telstra.corp is where you end up when you don't want to spend the big $$ on a private APN, but want similar functionality.
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Post by kris on Oct 28, 2015 18:05:01 GMT 11
Good luck EVangelist. I've spent the last month mucking around with 3G USB dongles & a Raspberry PI. What a mine field! Apart from the SIM problems there is the thorny issue of frequencies. A lot of 3G modules from overseas are 900/2100 MHz whereas Telstra uses 850/2100 MHz.
Is the Leaf telematics GSM? I thought GSM was good till Dec 2016?
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