Thanks for the response. I've got an arduino board that has serial
output via
4 pins.
Pin 1: ground
Pin 2: transmit
Pin 3: Receive
Pin 4: reset
I plug a usb adapter into it and that allows me to upload code to the
microprocessor and monitor
the output locally.
To answer your question:
-I'm looking to replace the arduino completely with a program
running on the phone that somehow,
someway generates a simple serial message 'as if' it were being
transmitted via that simple
pin configuration. (We're using a video overlay board that accepts
serial data and creates
a real time GPS text overlay for the students to watch locally and
analyze later.)
-Thanks for the advice. We've been using this Arduino for years now
and I think
it's time to replace it completely with Android. --It's a fun
challenge.
Josh
On Mar 11, 1:17 am, Bob Kerns <r...@acm.org> wrote:
> I'm not clear on what you're trying to do. Are you trying to get a
> phone to talk to an Arduino, or are you trying to replace the Arduino
> with a phone?
>
> Phone USB ports aren't generally set up to act as hosts, but as
> devices. Supposedly some phone USB ports are hardware capable of doing
> so, but I don't know the magic, nor do I recall which phones. That may
> not be a barrier; you may be able to set the Arduino up as host.
>
> At a minimum, you'll need to get root access on your phone, and
> probably need to use the NDK to write some C++ code to bridge between
> Java and actually talking to the hardware.
>
> I've got a couple different types of Arduinos around here with USB --
> one with it on the board, another, smaller one with it as an adapter
> you can connect to the output pins. I don't know if that solves any
> problems for you -- but at least the adapter would save you from
> dealing with the electrical interface aspects, and the USB bus
> protocol aspects. The latter would probably render your plan
> unfeasible, I think. I note that the USB adapter board has a tiny
> surface-mount chip on it that has about as many pins as the Arduino
> chip!
>
> The USB adapter wasn't very expensive. I could dig up the specific
> parts and sources, but you're probably better off googling and
> choosing what best fits your needs.
>
> On Mar 10, 7:11 pm, joshbeck <josh.beck2...@gmail.com> wrote:
>
>
>
> > I've got a fairly unique situation:
> > -I'm a teacher with a magnet school that focuses on rocketry and
> > technology.
> > -I've got a rocket payload that has a video overlay board which
> > does the following:
> > -Takes input from a camera.
> > -Takes input from a serial data line.
> > -Overlays the text input to the video screen in
> > real time and saves to avi.
>
> > -Right now we're using this antiquated device called an Arduino
> > board which
> > is cave man stuff compared to the developer phones we have on
> > campus.
> > (It's very educational making one work, but still old hardware.)
>
> > -The Arduino processor essentially outputs data to a 'transmit'
> > pin that can
> > be easily hooked up to a pc serial port. (Serial Data.)
>
> > -My present course of inquiry: (I'm a fairly proficient Android
> > developer)
>
> > --------------------------------------
> > -Can I write a program that outputs a simple string like
> > this directly to the usb data cable:
> > String aString = "abc";
> > ---------------------------------------
> > -From there, would it be possible to purchase a usb
> > to serial converter and
> > grab the associated data off the correct serial pin?
>
> > -I'm not an electrical engineer by any means, but I think that a
> > serial
> > converter would have to boost the voltage from the USB line
> > in order to work because usb voltages are lower than what
> > comes straight out the serial port.
> > -Does this sound like a correct assumption?
>
> > -Any advice is appreciated. We'd love to launch a smart phone at
> > our next competition.
>
> > Thanks in advance
> > Josh Beck
> > Northeast ISD
> > KSAT/iMAK at Krueger Middle School
> > (Launching Android in rockets is fun!)
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