This is a skeleton Arduino sketch that taps into the Mass Destruction telemetry stream.

telemetryConsumer.ino

#define TELEMETRY_ITEM_BUFFER_SIZE 40

#define OWN_NUMBER 100  // TODO: replace this with your assigned number

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

char telemetryBuffer[TELEMETRY_ITEM_BUFFER_SIZE];
int telemetryBufferPosition = 0;
bool completesTelemetryItem(char c) {
  telemetryBuffer[telemetryBufferPosition] = (c == '\n' || c == ' ') ? 0 : c;
  if (telemetryBufferPosition + 1 < TELEMETRY_ITEM_BUFFER_SIZE) {
    ++telemetryBufferPosition;
  }
  return c == '\n';
}

void parseTelemetryItem(int &robotId, double &x, double &y, double &theta) {
  char* buf = telemetryBuffer;
  robotId = atoi(buf);
  buf += strlen(buf) + 1;
  x = atof(buf);
  buf += strlen(buf) + 1;
  y = atof(buf);
  buf += strlen(buf) + 1;
  theta = atof(buf);
  telemetryBufferPosition = 0;
}

void handleSelfUpdate(double x, double y, double theta) {
  // TODO: do something violent!
}

void handleOtherUpdate(int robotId, double x, double y, double theta) {
  // TODO: do something violent!
}

void loop() {
  while (Serial.available()) {
    char c = Serial.read();
    if (completesTelemetryItem(c)) {
      int i;
      double x,y,t;
      parseTelemetryItem(i, x, y, t);
      if (i == OWN_NUMBER) {
        handleSelfUpdate(x, y, t);
      } else {
        handleOtherUpdate(i, x, y, t);
      }
    }
  }
}