Is this programma correct

[Sembot]

Can someone help me, is this a working Arduino program, I use this to make it work via Mit App Inventer, when I start the bluetooth the servos go to 90 degrees and then it's over, the bluetooth red lamp always flickers slowly so is this still connected

#include <Servo.h>

Servo servo1;
Servo servo2;

void setup() 
{
Serial.begin(9600);
servo1.attach(6); //servo 1
servo1.write(90);
servo2.attach(7); //servo 2
servo2.write(90);

}

void loop() {
if (Serial.available() >= 2 )//2
{
unsigned int a = Serial.read();
unsigned int b = Serial.read();
unsigned int val = (b * 256) + a;
if (val >= 0 && val <= 180) // servo 1
{
val=map(val,0,180,180,0);
servo1.write(val);
}
else if (val >= 1000 && val <= 1180) // servo 2
{
val=map(val,1000,1180,1180,1000);
servo2.write(val-1000);
}
//delay(25);
}
}

[sterretje]

@Sembot, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project See About the Installation & Troubleshooting category.

First test the Arduino sketch with serial monitor; once that works, you can sort the Android app out.

[anon73444976]

@Sembot

val=map(val,1000,1180,1180,1000);

That's a fancy/expensive way of doing

val = 2180 - val;

[Sembot]

I tried via monitor but it doesn't work
I type "a 50" or " a " or " 1 " all this doesn't work

[anon73444976]

What is the serial monitor line ending?

[Sembot]

new line

[anon73444976]

And the hex code for newline is . . ?

[Sembot]

i don't know this i thought it was the bottom setting of the monitor you are asking sorry

[anon73444976]

I'm trying to get you to think how your sketch will deal with unexpected characters, like newline.

[Sembot]

I think type enter but I actually do not know

[Sembot]

So I assume the software is ok , which was my question , but I still don't know how to use this in monitor mode

[sterretje]

I realise that you're using binary data; that is something serial monitor can not send. Sorry for putting you on the wrong foot.

Other terminal programs (e.g. Realterm under Windows) can send binary data.

[Sembot]

Thanks for the answer , what do I have to change to make it work via monitor mode , can someone help me with that

[sterretje]

Than it will not work with your app anymore. Rather install a decent terminal program. Be aware that only one application can have a serial port open; if another terminal program has the port open, you can not upload.

But if you go text-based, have a look at the examples in Robin's Serial Input Basics - updated.