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Libraries \ Messenger

Reference for Wiring version 1.0 Build 0100+ If you have a previous version, use the reference included with your software. If see any errors or have any comments, let us know.

Class | Messenger
Name |

### checkString()

Examples |
    #include <Messenger.h>

    // Instantiate Messenger object with the message function
    //and the default separator (the space character)
    Messenger message = Messenger();

    // Define messenger function
    void messageCompleted()
    {
      if ( message.checkString("r") )
      { // Read pins (analog or digital)
        if ( message.checkString("a") )
        {
          Serial.print("a ");
          for (char i=0;i<8;i++)
          { // Read pins 0 to 8
            Serial.print(analogRead(i),DEC); // Send the pin value
            Serial.print(" "); // Add a space separator
          }
          Serial.println(); // Terminate message
        }
        else if ( message.checkString("d") )
        {
          Serial.print("d ");
          for (char i=0;i<23;i++)
          { // Read pins 0 to 23
            Serial.print(digitalRead(i),DEC); // Send the pin value
            Serial.print(" "); // Add a space separator
          }
          Serial.println(); // Terminate message
        }
      }
      else if ( message.checkString("w") )
      { // Write pin (analog or digital)
        if ( message.checkString("a") )
        {
          int pin = message.readInt();
          int value = message.readInt();
          analogWrite(pin,value); //Sets the PWM of the pin
        }
        else if ( message.checkString("d") )
        {
          int pin = message.readInt();
          int state = message.readInt();
          digitalWrite(pin,state); //Sets the state of the pin
        }
      }
      else if ( message.checkString("p") &&  message.checkString("m") )
      { // Pin mode
        int pin = message.readInt();
        int mode = message.readInt();
        pinMode(pin,mode);
      }
    }

    void setup()
    {
      // Initiate Serial Communication
      Serial.begin(115200);
      message.attach(messageCompleted);
    }

    void loop()
    {
      // The following line is the most effective way of
      // feeding the serial data to Messenger
      while (Serial.available()) message.process(Serial.read());
    }
Description | Compares the element to the string toCheck. If there is a match, the method returns true (1) and removes the element from the completed message. If there is no match, the method returns false (0) and does not remove the element from the completed message.
Syntax |
    checkString(string)
Parameters |

string | The target char array.

Returns | int
Usage | Application

Updated on July 07, 2011 11:11:04pm PDT