Hacks for the Nuvi 350

 

Heck, the Nuvi is a computer after all, right? Are there any published hacks for the Nuvi 350?

By the way, does anyone know what CPU and OS are used on the Nuvi? And where can one see that?

...Jake

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Nuvi 350

'fraid not.

j_colman wrote:

Are there any published hacks for the Nuvi 350?

Not so far sad

Quote:

By the way, does anyone know what CPU and OS are used on the Nuvi?

That too remains a complete mystery!

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------------------------ Phil Hornby, Stockport, England ----------------------               http://GeePeeEx.com - Garmin POI Creation made easy           »      

Similar topic under discussion

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*Keith* MacBook Pro *wifi iPad(2012) w/BadElf GPS & iPhone6 + Navigon*

I agree, it'd be great to

I agree, it'd be great to add custom software, customize the layout of the screens, etc., but I don't really expect it to happen. If GPS service was not free, I'm SURE someone would find a way to hack it until they found a way to get it for free. However, since it's already free, the 'hackers' probably have bigger things on their minds.

We can still keep our fingers crossed though..

We know it's an ARM

We know it's an ARM processor. Look at the shutdown diagnostics and you see a CPSR register which is defined in the ARM architecture.

If you are familiar with computer architecture take a look at pg 8 ARM7 register set at http://tinyurl.com/2sjw4t

As far as the OS I have examined the binary in a hex editor and it's ARM assembler. There is no indication what OS is used. I suspect Vxworks or home grown closed os based on the licenses in the system about. No GPL or BSD license so probably not a Unix derivative. Note: the FreeType Project, JPEG and the Expat XML parser licenses.

Most embedded OSes are stripped to the bare minimum, so it may not be easy to determine the OS components.

The diagnostics screen showing the OS stacks really does not indicate an OS , but you can see the memory foot print of the functions of the OS.

Note: I have worked on various embedded OSes on various computer architectures (Intel, PPC, ARM, MIPS).

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eTrex Touch 35, Nuvi 1350LMT, Nuvi 350, Nuvi 260, Garmin GPS III, Basecamp

Palm?

Could be palm OS? I knew that they made Aviation GPS software for the Palm OS and it is a lightweight fit for the function.

The Garmin iQue used Palm OS

The Garmin iQue used Palm OS 5.2. I am pretty sure the nuvi os is not Palm OS based unless Access has stripped down version of Palm OS. I have not used an OS from Access since they bought PalmOS so I am not familiar with their recent offerings.

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eTrex Touch 35, Nuvi 1350LMT, Nuvi 350, Nuvi 260, Garmin GPS III, Basecamp

Start Hacking your NUVI!

Ok, So I dont know exactly what to do with this information, so use it at your own risk.

I JUST DISCOVERED THE NUVI TEST MODE!

From your navigate screen, Touch the miles per hour in the lower left hand corner of the screen.

Touch the Speedometer on the top of the screen and hold your finger there for 5 seconds.

VIOLA! Theres more to my nuvi than I thought.

Anyone have any idea what the FM MODE is all about?
And why is there messages talking about XM Radio Compatibility?

Be careful...

On the 260

Touch Overall Avg and hold Max Speed to see the stuff inside from available mem size to how much is in use. (just in case don't hit reset)

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Garmin 38 - Magellan Gold - Garmin Yellow eTrex - Nuvi 260 - Nuvi 2460LMT - Google Nexus 7 - Toyota Entune NAV

Very interesting...

Another test mode (or something) can be accessed by holding your finger down on the Current Time in the upper right hand corner of the screen...

It enters a test mode that has a couple of nice video tests.

Now what do we do with this information... Does anyone understand it?

Some of it? It is just a

Some of it? It is just diagnostics pages for Garmin engineering and manufacturing. Manufacturing uses it to make sure your Garmin is not dead-on-arrival.

The batter test page is very useful! The number of cycles (Chrg Cycles) will tell you when your battery will die. Around 300-500 discharges/charge cycles until your battery will be worthless.The Bat Chrg stats are very useful for anyone making a homemade charger from parts.

The Audio Test page has a great tone generator you can use to tune a piano or guitar.

Data Card Test Page would be great to use if you suspect your data card is corrupting data.

Also we can extract some information on the design. It's an ARM based custom processor and a few other tidbits like the USB_ID which your Nuvi uses on USB bus to identify itself to your PC. I'd have to go through all the data....

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eTrex Touch 35, Nuvi 1350LMT, Nuvi 350, Nuvi 260, Garmin GPS III, Basecamp

reset diagnostic mode

you get it by holding your finger in the left upper corner as you are looking at the unit during power up. Also I noticed holding the power button down displays some boot message too, not sure what that's about.

Re: Start Hacking your NUVI!

Does this just apply to the nuvi 350? What about other nuvi models?

Re: Start Hacking your NUVI!

beagle.fan wrote:

Does this just apply to the nuvi 350? What about other nuvi models?

Never mind... I was able to answer my own question. (Answer is yes -- it works on other models beside the 350.)

battery tester

Hey Tick,

What do we do after the battery becomes worthless? I think I hit the 300 mark since my unit is always plugged into the car when I drive. I tested battery life the other day and it only lasted 1.5 hours.

Replace the battery

fubar wrote:

Hey Tick,

What do we do after the battery becomes worthless? I think I hit the 300 mark since my unit is always plugged into the car when I drive. I tested battery life the other day and it only lasted 1.5 hours.

It's actually fairly easy for the reasonably handy person. I replaced my 760's battery a while ago and the battery plus the little tool kit was less than $20. Good as new again!

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thetick wrote:

The batter test page is very useful! The number of cycles (Chrg Cycles) will tell you when your battery will die.

Just checked mine it says 4 next to the chrg cycles so what's that mean,surly i have more then 4 left before my batt dies i've hardly use this since new.

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Garmin nuvi 350 Lifetime Map Updates NT 2018.10

thanks

john c. I searched how to do this for my 360 and it looks pretty simple.

How does one get to the battery test page for the 350?

I'm not clear on the issue. Thanks in advance.

GC

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Nuvi 350, GPS Map 76CX

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daman wrote:
thetick wrote:

The batter test page is very useful! The number of cycles (Chrg Cycles) will tell you when your battery will die.

Just checked mine it says 4 next to the chrg cycles so what's that mean,surly i have more then 4 left before my batt dies i've hardly use this since new.

????????

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Garmin nuvi 350 Lifetime Map Updates NT 2018.10

.

daman wrote:
daman wrote:
thetick wrote:

The batter test page is very useful! The number of cycles (Chrg Cycles) will tell you when your battery will die.

Just checked mine it says 4 next to the chrg cycles so what's that mean,surly i have more then 4 left before my batt dies i've hardly use this since new.

????????

????????

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Garmin nuvi 350 Lifetime Map Updates NT 2018.10

Charges used?

I suspect 4 is the number of charges used if it is normally plugged in. Probably counts up, not down. Just guessing!

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Nuvi 265WT, 200W

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garyandrhoda wrote:

I suspect 4 is the number of charges used if it is normally plugged in. Probably counts up, not down. Just guessing!

Thanks but i don't usually use it plugged in,i fully charge it then usually it last for the trip if it's not a long one.

i'm thinking it counts up also but not sure.

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Garmin nuvi 350 Lifetime Map Updates NT 2018.10