Compare char with integers

Using Arduino Project Guidance
1

if(bluetooth.available()) // If the bluetooth sent any characters
{
// Send any characters the bluetooth prints to the serial monitor
Serial.println((char)bluetooth.read());

if ((char)bluetooth.read() == 3){
ledOn();
}
if ((char)bluetooth.read() == 4){
ledOff();
}
}
if(Serial.available())
{
bluetooth.println((char)Serial.read());
bluetooth.println("Serial got something");
}
}

I have sent in the value into the bluetooth from my mobile phone. I can recieve the value on the serial using char. However I cannot read the value or turn on my LED with this current code. Anyone knows how to compare them properly?

2

If your comparing the ASCII character 3 then you need to put it in ' marks

      if ((char)bluetooth.read() == '3'){

      if ((char)bluetooth.read() == '4'){
3

Yes i did that. But my arduino UNO occasionally it does received the data but sometime it did not. which now I am wondering if it is my arduino UNO who is causing the problem :confused:

4

However I cannot read the value or turn on my LED with this current code

You can't do anything with that code, because it cannot possibly compile. (No setup, loop or main)

5

It's more likely that it's your code than your Arduino. If you post it (and use code tags instead of quote tags), we can have a look at it.