Ultimate GPS & TFT Touch Screen

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gearmesh
 
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Ultimate GPS & TFT Touch Screen

Post by gearmesh »

I am trying to build a GPS speedometer. I have seen many people do it before but their displays were too small for my needs. I purchased the Ultimate GPS breakout board (part 746), an Arduino Uno R3 and the 2.8" TFT Touch Shield (part 1651).

Solution ideas:

Since the TFT shield covers all the I/O pins:
Option #1: Can I solder the GPS leads to the backside of the Uno. If so, do I use the same pins that are in the Ultimate GPS wiring shows or will those conflict with the display's pins needs?

Option #2: I do not have a need for the display to be a shield so I could separate it from the Arduino. If I did, which pins need to be jumpered between the boards?
If the TFT shield conflicts with the GPS.

Option #3: If I buy a breakout version of the same display, will that work? I love the TFT display and I will use it for another project if I can't use it for this. Touch is not a requirement (just a perk).

Any help would be appreciated.

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adafruit_support_mike
 
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Re: Ultimate GPS & TFT Touch Screen

Post by adafruit_support_mike »

Soldering to the underside of the Uno will work, and you can use female-to-male jumpers (https://www.adafruit.com/products/826) to connect the necessary pins of the Arduino to the TFT Shield.

You could also use one of our Wingshields: https://www.adafruit.com/products/196

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gearmesh
 
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Re: Ultimate GPS & TFT Touch Screen

Post by gearmesh »

Thanks.. I ordered both suggestions as I will need whichever one I don't use this time, for my next project.
Last edited by gearmesh on Sat Apr 04, 2015 11:22 am, edited 1 time in total.

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adafruit_support_rick
 
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Re: Ultimate GPS & TFT Touch Screen

Post by adafruit_support_rick »

The shield uses pins 4, 8, 9, 10, 11, 12, 13, 5V and GND. Use pins 2 and 3 for the GPS.

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gearmesh
 
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Re: Ultimate GPS & TFT Touch Screen

Post by gearmesh »

Everything worked just as you explained. My project is working! There is no case for it yet but that can come later.
Is there a way I can power off just the display programmatically? Like set a pin low or something? This way I could power down the display while the unit is not in motion for 5 minutes or so, then I could power it back on once the Arduino+gps sees my speed go over 1 or 2 mph. I also purchased the powerboost shield + 2000mAh battery as part of the project to power the solution.

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adafruit_support_rick
 
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Re: Ultimate GPS & TFT Touch Screen

Post by adafruit_support_rick »

gearmesh wrote:Is there a way I can power off just the display programmatically?
Maybe. Which display did you wind up with? Post a link to the product page

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gearmesh
 
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Re: Ultimate GPS & TFT Touch Screen

Post by gearmesh »

I have the 1651
https://www.adafruit.com/product/1651

and am running the PowerBoost Sheild
https://www.adafruit.com/product/2078

If I could power off just the display and keep the Arduino & gps on, then I could trigger powering up the display upon movement.

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adafruit_support_rick
 
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Re: Ultimate GPS & TFT Touch Screen

Post by adafruit_support_rick »


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gearmesh
 
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Re: Ultimate GPS & TFT Touch Screen

Post by gearmesh »

That post is perfect. Thanks. I will implement that next week.

Here is it outside of the case...
IMG_20150418_131854 (600 x 450).jpg
IMG_20150418_131854 (600 x 450).jpg (66.63 KiB) Viewed 404 times
and..
IMG_20150418_131911 (600 x 450).jpg
IMG_20150418_131911 (600 x 450).jpg (66.27 KiB) Viewed 404 times

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adafruit_support_rick
 
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Re: Ultimate GPS & TFT Touch Screen

Post by adafruit_support_rick »

Looking good!

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