Fona, GPS, RFID

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TW79
 
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Joined: Fri Jun 13, 2014 1:25 pm

Fona, GPS, RFID

Post by TW79 »

Team,

I'm working on a project that will require the use of FONA, the Ultimate GPS Breakout and an RFID reader. All devices seem to want to use the Tx/Rx AMAO pins. From my understanding, there can only be one device hooked up to those pins.

I need suggestions.

How can I hook up these three devices? I've heart of multiplexing, but have no idea how to get started with that. Or, is there a way to make the GPS and FONA hook up to the GPIO pins instead of needing UART? I won't need to use the devices at the same time, so perhaps I can have them share a row on a breadboard and..... something.

Be gentle with me, I'm a little new to electronics.

I appreciate your ideas.

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adafruit2
 
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Joined: Fri Mar 11, 2005 7:36 pm

Re: Fona, GPS, RFID

Post by adafruit2 »

If you're on an arduino - you *may* be able to use software Serial

If you're on BBB or Pi (linux, etc) you're gonnna have to connect two (or three) via usb-serial cables!
https://www.adafruit.com/product/954
we show how to do this with the ultimate GPS already :)

https://learn.adafruit.com/adafruit-ult ... spberry-pi

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tdicola
 
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Joined: Thu Oct 17, 2013 9:11 pm

Re: Fona, GPS, RFID

Post by tdicola »

You might look into the BeagleBone Black too, it has 4 serial ports available on its headers: https://learn.adafruit.com/setting-up-i ... black/uart You have to load some device tree overlays to make them accessible, but once done they should show up as normal UART device under /dev/tty*.

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