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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