mac terminal / airport serial to arduino

shawnsims

mac terminal / airport serial to arduino

in Integration and Hardware • 3 years ago

Been digging through the forums and haven't found much on mac terminal stuff, thought I would ask...

I can get my mac terminal to read the wifi strength by using the following code...

simple version_
/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI

this version feeds serial every .5 seconds_

while x=1; do /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI; sleep 0.5; done

I would like to have this same function(#2) occur in Processing so that I can feed that serial data to arduino. 

thanks
Shawn

Replies(2)

andreas.s..

Re: mac terminal / airport serial to arduino

3 years ago

had to give this a try, this is what i got:

AirportReader ar;
void setup() {
ar = new AirportReader(500);
}
void draw() {
background(0);
fill(255);
text(ar.getValue(), width/2,height/2);
}
class AirportReader implements Runnable {
boolean running;
int interval;
Process myProcess;
String[] cmd;
int myValue;
AirportReader(int theInterval) {
running = true;
interval = theInterval;
// use /bin/bash since | (pipe) is not understood by Runtime's exec()
cmd = new String[] {
"/bin/bash",
"-c",
"/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI",
};
new Thread(this).start();
}
int getValue() {
return myValue;
}
public void run() {
println("running ..");
while(running) {
try {
Thread.sleep(interval);
try {
myProcess = Runtime.getRuntime().exec(cmd);
}
catch(IOException e) {
System.err.println(e);
}
try {
String myString;
DataInputStream myInput = new DataInputStream( myProcess.getInputStream());
try {
while ((myString = myInput.readLine()) != null) {
myValue = int(trim(myString.substring(myString.indexOf(":")+1)));
}
}
catch (IOException e) {
System.err.println(e);
}
}
catch (Exception e) {
System.err.println(e);
}
}
catch( InterruptedException e ) {
System.err.println(e);
}
}
}
}

andreas schlegel, http://www.sojamo.de

shawnsims

Re: Re: mac terminal / airport serial to arduino

3 years ago

amazing! thanks andreas works great

Top Reply