I'm controlling a small 12v dc motor with PWM and Arduino.
I would like to change the frequency on the fly via a smartphone from about 5ft away. The frequency is hard coded in the sketch.
Would it be best to use Blue Tooth, Wi-FI or a PHPoC Shield?
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Bob.
duinoMike:
I'm controlling a small 12v dc motor with PWM and Arduino.I would like to change the frequency on the fly via a smartphone from about 5ft away. The frequency is hard coded in the sketch.
Would it be best to use Blue Tooth, Wi-FI or a PHPoC Shield?
What sketch?
What model Arduino are you using?
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html .
Then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
Tom... 
duinoMike:
I'm controlling a small 12v dc motor with PWM and Arduino.I would like to change the frequency on the fly via a smartphone from about 5ft away. The frequency is hard coded in the sketch.
Would it be best to use Blue Tooth, Wi-FI or a PHPoC Shield?
I suspect you mean the PWM value (0 to 255) rather than the PWM frequency, but please clarify.
Do you already have a smartphone program to send data to the Arduino? Does that use Bluetooth or WiFi?
If you don't have a smartphone program then you will need to get or create one.
To my mind Bluetooth is probably simplest as it is just Serial-By-Wireless.
...R