Read the datasheet on how to arm it. Replicate the arming sequence in your code. If you need more help, post a link to the datasheet.

You need to post the whole sketch. A single line with a comma at the end (meaning that it's just a part of a statement) is not enough to give a useful answer.

Just downloaded 1.5.1r2 on my 10.7.5 machine, and it ran ok. Uploaded some sketches to an Uno, but I don't have a Due. In case it makes a difference, java -version reports:

Code:

java version "1.6.0_37"
Java(TM) SE Runtime Environment (build 1.6.0_37-b06-434-11M3909)
Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01-434, mixed mode)

Link to what? There is a search box in the top right corner, or try Google/Bing/Whatever.

Check the pin usages:

http://www.seeedstudio.com/wiki/GPRS_Shield_V1.0#Pins_usage_on_Arduino

http://www.seeedstudio.com/wiki/2.8%27%27_TFT_Touch_Shield_V1.0#Pins_usage_on_Arduino

They both use pin 9, and potentially both use 7 and 8, depending on whether you use hardware or software serial.

Did you search for level shifting? You could also try rectifying the signal.

Not enough information provided. Are the Arduino and the client on the same network? Post the sketch you are using.

Haven't tried 1.5+ on my MBP yet. I'll try it later, when I'm on the machine. Which version of the OS are you running?

Your new library is the github folder "AS3935" copy that folder with all the files and examples folder.
in the arduino install folder "xxx\arduino-1.0.x\libraries" make sure its "libraries" NOT "lib".


FYI:After install I used the example sketch and it verified fine on win7 64-bit, Arduino 1.0.2

That's not the correct place for third-party libraries. They should go, as PaulS said, in the libraries subdirectory of your sketchbook directory. If you don't know the location of the sketchbook directory, look in preferences.

You have the Arduino Uno board selected. You need to select the Due for the IDE to find Arm specific libraries, like Audio, correctly.

Please don't crosspost.

http://arduino.cc/forum/index.php/topic,138052.msg1036780.html#msg1036780
http://arduino.cc/forum/index.php/topic,138049.msg1036774.html#msg1036774
http://arduino.cc/forum/index.php/topic,138047.msg1036772.html#msg1036772

[For floating point numbers, this parameter specifies the number of decimal places to use.]

http://arduino.cc/en/Serial/Print

An optional second parameter specifies the base (format) to use; permitted values are BIN (binary, or base 2), OCT (octal, or base 8), DEC (decimal, or base 10), HEX (hexadecimal, or base 16). For floating point numbers, this parameter specifies the number of decimal places to use.

But note that: http://arduino.cc/en/Reference/Float

Floats have only 6-7 decimal digits of precision. That means the total number of digits, not the number to the right of the decimal point. Unlike other platforms, where you can get more precision by using a double (e.g. up to 15 digits), on the Arduino, double is the same size as float.

You might find http://www.instructables.com/id/How-to-Build-an-Arduino-Powered-Chess-Playing-Robo/ useful. The sketch is based on code from http://sjeng.org/index.html.

Note that if you increase the width of the paddle, you should restrict the range of possible positions so that the edge of paddle doesn't go off the screen. (This would also address the clipping issue that AWOL refers to.)

You'll also want to change the collision detection code so that you can tell when the ball hits the ends of the paddle.

It would depend on the type of device that your GPS presented itself as. Circuits@Home support some GPS devices on their host shield - http://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-2-0-for-arduino/.