Show Posts
Pages: 1 ... 10 11 [12] 13 14 ... 18
166  Using Arduino / Networking, Protocols, and Devices / Re: Wifi Shield Choice on: August 19, 2012, 08:06:50 pm
If you want to wirelessly transmit data, the two options that I recommend (extensive community use, so you're likely to find working code for both) are Xbee or RN-XV.
167  Using Arduino / Networking, Protocols, and Devices / Re: Bluetooth v4 LE HowTo on: August 19, 2012, 08:04:42 pm
@kikolobo, I sent you a private msg about this.
168  Using Arduino / Networking, Protocols, and Devices / Re: Can WiFi Shield go into adhoc (infrastructure) mode? on: August 19, 2012, 07:49:44 pm
@epinc and @Kikolobo:

What problems did you have with the RN-XV if/when you tried it? The setup should be very straightforward for the purpose of adhoc mode and accessing it from a remote computer/iPhone...

To put it in adhoc mode, just solder or connect a wire between Pin 8 and GND (Pin 10). Then if you provide power to the RN-XV (maybe convenient via Sparkfun USB explorer, or some other Xbee breakout), you should see the name "Wifly-GSX-..." on the wireless networks on your iPhone or your computer, etc. I believe you can also rename that to any network name you would like by configuring the RN-XV.

epinc, how much data throughput are you attempting that is giving you problems when data is going back and forth?
I had some trouble with the infrastructure mode and UDP on the RN-XV but adhoc and TCP turned out pretty straightforward.
169  Using Arduino / Networking, Protocols, and Devices / Re: Can WiFi Shield go into adhoc (infrastructure) mode? on: August 18, 2012, 10:01:49 pm
Doesn't seem to be the case... Here is mini datasheet for the H&D module used on the shield:

In your specific case, why not the alternative of setting up a network on the computer's end, and connecting to it from the Wifi shield?
170  Using Arduino / Networking, Protocols, and Devices / Re: wireless programming on UNO with xbee s1? on: August 18, 2012, 09:18:00 pm
There is a comment regarding the issue on that same page (they suggest trying at a different baud rate):

In fact, that is a tip on this page too -- configure Xbee to run at 57600 bps, b/c the Atmega328P bootloader communicates at that rate:

Also, for some perspective, you may want to read the section "Wireless Programming" on this page:

Try it and report back on what happens.
171  Using Arduino / Networking, Protocols, and Devices / Arduino Wifi shield released... finally! on: August 18, 2012, 09:08:40 pm
Just saw this on the blog and so alerting those who were waiting for this shield... I know I've been looking forward to it for the last several months, schedule-misses notwithstanding:

Somewhat expensive though, compared to alternatives that came out in the last few months, but I think I'm gonna try it out. Currently researching whether it is capable of adhoc mode
172  Using Arduino / Project Guidance / Re: An interesting new option for Android connectivity on: August 12, 2012, 08:22:15 am
Definitely planning to order a couple of samples to test it out.

Also, for those interested, they made a bunch of Android-side programs available to demo:

Of particular interest to me is the fact that this chip is directly capable of versatile interfacing types (a few GPIO pins, I2C, SPI, as well as of course UART) on the peripheral side.

Only problem is this part's only available in QFN/QFP footprint
173  Using Arduino / Project Guidance / An interesting new option for Android connectivity on: August 11, 2012, 07:58:44 pm
For those who are interested in Arduino-Android interfacing:

It appears FTDI released a chip FT311D that can allow straightforward Android connectivity, with microcontroller/Arduino acting as accessory/USB-host:

They have an app-note detailing the setup:
174  Using Arduino / Project Guidance / Re: Arduino + Android on: August 11, 2012, 07:53:37 pm
If you still haven't gotten the ADK2012 download to work, just send me a PM, and I will email you the files.
The download was a bit troublesome for me too at first, especially if you're on Windows.

Of those two choices, the IOIO has a far larger community behind it, and has a better track record, and in fact, the designer collaborated with Google on it. And last but not least, it allows Bluetooth communication with Android.

175  Using Arduino / Networking, Protocols, and Devices / a solution for iPhone to Arduino on: May 14, 2012, 11:04:05 pm
Was glad to see this new product on Makershed, so thought I'd share it with those interested:

Seems to allow connecting iPhone/iPad to Arduino, with Serial/TTL, all without jailbreaking ;-) There have been a bunch of threads on here by people looking for something like this, so maybe this will be a solution?

I had messed around pretty successfully with an earlier version of this after reading Alasdair Allan's book called "iOS Sensor Apps with Arduino" (although at that time this cable was only available with RS-232, so I had to use a MAX232 chip for that older version), and was able to input some sensor readings onto my iPad and also, in reverse, used the iPad to control a simple blinking LED... Easy to that extent but need to learn more app-programming
176  Using Arduino / General Electronics / Re: Arduino2Max Force Sensitive Resistor - where is the issue? on: April 07, 2012, 01:41:47 am
This is how I would try to isolate the problem, because it seems very vague at this point:

1) First, WITHOUT using Arduino2Max, but instead just using the most basic config with the ArduinoBT (, verify the working status of your ArduinoBT and your Mac's communication with it... In other words, upload and run a simple sketch with a Serial.println("abc") or an LED-Blink, and check that the LED blinks or that the Serial terminal on your Mac is printing "abc").
2) Next, verify that your FSR itself is working (using a multimeter). Read the section on the ladyada/adafruit page that said "Testing your FSR".
3) Next, verify the working status of the Arduino2Max: upload a simple program with a Digital read of a pushbutton connected on one of the Digital pins, or a simple Analog read on an Analog pin while leaving the pin just open.

Report back for what happens with each of the above steps, isolated, and that will help fix the problem.

Also, try to upload a clearer/zoomed-in picture (or multiple pictures) of your circuit layout.
177  Using Arduino / General Electronics / Re: Arduino2Max Force Sensitive Resistor - where is the issue? on: April 06, 2012, 01:23:57 pm
armagideontime, I don't know about the other readers, but from your post, I didn't even understand what/where the problem you are seeing is. Please clarify what exactly didn't work? In other words, you explained what you did with the FSR setup, etc., but what did you see?

Also, when you say 9V terminal, how are you supplying this 9V?
178  Using Arduino / General Electronics / What could be possible reasons for Atmega-chip and Xbee heating up? on: April 06, 2012, 01:04:14 pm
The heating up is slight; temperature of the two parts is maybe a bit less than 40 degrees Celsius. But still trying to diagnose for future reference...

The layout is simple:
--PCB with an Atmega2560V (Arduino bootloader, 3.3V, 8Mhz) and an Series 1 Xbee-Pro (50 mA to 215 mA current draw).
--Made two bad choices, b/c of little experience with PCB design: Used thin traces (8 mil width) throughout the PCB trying to keep it compact. Also did NOT put any copper pours.
--Power comes from Li-ion battery, supplied via TPS63001 Buck-boost regulator with 3.3V output (great and simple regulator; allows up to 1200 mA output current)
--The regulator has the "TI Powerpad" design, i.e., thermal pad under chip soldered onto PCB pad with vias, to allow thermal dissipation.

The heating up is happening on the Atmega chip and the Xbee only. While the part of the PCB around these parts is also heating up slightly, the rest of the PCB and the rest of the parts are cool.

What could be possible culprits that I should check for in a scenario like this?
179  Using Arduino / Programming Questions / Re: delay of 1 us on: March 29, 2012, 10:01:55 am
(This doesn't have anything to do with the OP's question but..)
PaulS, what is the reason why a volatile-defined variable would prevent that?
180  Using Arduino / Programming Questions / Re: a way to define conditions? on: March 29, 2012, 09:24:12 am
Thanks pYro_65 and PaulS.
Modified the code appropriately and worked great.

What else may (or are useful to) be defined as preprocessor defines, apart from constants and conditions?
Pages: 1 ... 10 11 [12] 13 14 ... 18