Newbie Scetch help

Using Arduino Programming Questions
1

Good day

Please help me fix this code to maker it compile & work.

I get the following error when I compile my scetch: "ISO C++ forbids comparison between pointer and integer"

Here is the scetch:

int command = 0 ;

void setup() {
  // put your setup code here, to run once:
  delay(1000);          // wait a bit before starting
  Serial.begin(115200);   // set up Serial library at 9600 bps
}

void loop() {
  // put your main code here, to run repeatedly: 
    if (Serial.available() > 0) {
    command = Serial.read();
    if (command == "1")
	//pan left
    if (command == "2")
	//pan center
    if (command == "3")
	//pan right
    if (command == "4")
	//tilt up
    if (command == "5")
	//tilt center
    if (command == "6")
	//tilt down
    
    command = 0;  
}
}

The error is displayed first on the following line: if (command == "1")

2 
(command == '1')

NB single quotes.

"ISO C++ forbids comparison between pointer and integer"

"command" is the integer, and in your version, "1" is a string, so is represented by a pointer.

3

Good day

Thank you very much for your help.
Will this change still be able to read the serial port data beeing sent to my Arduino?

Thanks
Riaan Deyzel

4

Yes.
'1' is the integer value 49 decimal, 0x31

5

Thank you very much.

I will try it this weekend.
I am busy playing around with apps that moves servo's around, and this code will be used for the following example.

http://arduino.cc/forum/index.php/topic,55429.0.html

Pitty the "Here is that example slightly modifed to have more buttons" project it is not in c# source code with scetch, but as they say, beggars can't be choosers.

Thanks again for the help.

6

Use single quotes to read the ASCII value not double quotes...Double quotes are used to print or scan the string...