// Example 5 - Receive with start- and end-markers combined with parsing

const byte numChars = 32;
char receivedChars[numChars];
char tempChars[numChars];        // temporary array for use when parsing
      // variables to hold the parsed data
int messageFromPC = 0;
int integerFromPC = 0;
int floatFromPC = 0;
boolean newData = false;
//============
void setup() {
    Serial.begin(9600);
    Serial.println("This demo expects 3 pieces of data - text, an integer and a floating point value");
    Serial.println("Enter data in this style <HelloWorld, 12, 24.7>  ");
    Serial.println();
}
void loop() {
    recvWithStartEndMarkers();
    if (newData == true) {
        strcpy(tempChars, receivedChars);
        parseData();
        showParsedData();
        newData = false;
    }
}
//============
void recvWithStartEndMarkers() {
    static boolean recvInProgress = false;
    static byte ndx = 0;
    char startMarker = '<';
    char endMarker = '>';
    char rc;

    while (Serial.available() > 0 && newData == false) {
        rc = Serial.read();

        if (recvInProgress == true) {
            if (rc != endMarker) {
                receivedChars[ndx] = rc;
                ndx++;
                if (ndx >= numChars) {
                    ndx = numChars - 1;
                }
            }
            else {
                receivedChars[ndx] = '\0'; // terminate the string
                recvInProgress = false;
                ndx = 0;
                newData = true;
            }
        }

        else if (rc == startMarker) {
            recvInProgress = true;
        }
    }
}
//============
void parseData() {      // split the data into its parts

    char * strtokIndx; // this is used by strtok() as an index

    strtokIndx = strtok(tempChars, ","); // this continues where the previous call left off
    messageFromPC = atoi(strtokIndx);     // convert this part to an integer
 
    strtokIndx = strtok(NULL, ","); // this continues where the previous call left off
    integerFromPC = atoi(strtokIndx);     // convert this part to an integer

    strtokIndx = strtok(NULL, ","); // this continues where the previous call left off
    floatFromPC = atoi(strtokIndx);     // convert this part to an integer

}
//============
void showParsedData() {
    Serial.print("Message ");
    Serial.println(messageFromPC);
    Serial.print("Integer ");
    Serial.println(integerFromPC);
    Serial.print("Float ");
    Serial.println(floatFromPC);
}