I made some small progress on this, but for me it was really exciting. I hosted a Apache server on my laptop and created a simple php script
<?php $fp = fsockopen("localhost", 5334, $errno, $errstr, 30); if(!$fp){ echo "$errstr ($errno)"; } else{ fwrite($fp,$_POST["angle"]); fclose($fp); } ?>
This sends data to the arduino running this sketch.
#include <Servo.h>
Servo myServo;
int incomingByte = 0;
int nPulseWidth = 1500 ; // 1500, defined in servo.h
String readString;
void setup()
{
myServo.attach(2);
// the library sets all servos to 1500 ms pulse width by default, this is center for a steering servo
Serial.begin(9600);
Serial.println("Completed setup");
}
void loop()
{
while (Serial.available()) {
char c = Serial.read(); //gets one byte from serial buffer
readString += c; //makes the string readString
delay(2); //slow looping to allow buffer to fill with next character
}
if (readString.length() >0) {
Serial.println(readString); //so you can see the captured string
incomingByte = readString.toInt(); //convert readString into a number
nPulseWidth = (int) (incomingByte/90.0*1000 + 500);
myServo.writeMicroseconds(nPulseWidth);
Serial.print("Sending Servo: ");
Serial.println(nPulseWidth,DEC);
readString="";
}
}
It was just exciting being able to control the servo from my tablet over our intranet.