icetube GPS

by paulfos on Thu Aug 16, 2012 9:05 pm

Hello all,

The GPS module used in the tutorial; http://www.ladyada.net/make/icetube/mods.html is no longer available. Is another one of the GPS modules available in the adafruit shop usable as a substitute?

Thanks very much.
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Re: icetube GPS

by adafruit_support_bill on Fri Aug 17, 2012 4:43 am

Any module with TTL level outputs that will run on 5v could be used for this mod. The UltimateGPS Breakout wold be a good choice.
https://www.adafruit.com/products/746
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Re: icetube GPS

by adafruit on Tue Aug 21, 2012 8:10 pm

with the coin cell in the GPS module, itll be perfect!
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Re: icetube GPS

by Twizted on Tue Aug 28, 2012 10:53 am

I'm assuming this would require a firmware rewrite to properly support the new module?
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Re: icetube GPS

by grumpygasbag on Thu Aug 30, 2012 6:57 am

Hi Twizted,

Nope. All the GPS receivers will (should) include the GPRMC string in their data stream. That's the string used by the various GPS-enabled firmwares posted on the forums. No changes to firmware that worked with the old module sold in the Adafruit shop should be required for the newer one mentioned by Adafruit_support.

You may need minor hardware mods if you want to use a different receiver that outputs RS232 (like the BR-335 that I've got - you'll need a simple single-transistor inverter for that) instead of TTL. The connection to pin 2 of the ATmega168V (or 328p) in the clock needs TTL.

Have a look at these threads for lots of info on this specific subject, and keep an eye out for WBP's newest firmware (which I have no doubt he will post in the next couple of days).

http://forums.adafruit.com/viewtopic.php?f=41&t=32660

http://forums.adafruit.com/viewtopic.php?f=41&t=31146

http://forums.adafruit.com/viewtopic.php?f=41&t=25108
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