 #define SerialOdoOut  Serial3
 #define SerialMonitor Serial
 
+#if (VEHICLE_NUMBER == 1)
 #define WHEEL_DIAMETER_MM 397
+#endif
+#if (VEHICLE_NUMBER == 2)
+#define WHEEL_DIAMETER_MM 500
+#endif
 #define MEG 1000000
 #define MAX_SPEED_KPH 50
 #define MAX_SPEED_mmPs   ((MAX_SPEED_KPH * MEG) / 3600)

    ShowTime_ms = TickTime;
    InterruptState = IRQ_NONE;

    attachInterrupt (0, WheelRev, RISING);//pin 2 on Mega
    SerialMonitor.print("TickTime: ");
    SerialMonitor.print(TickTime);
    SerialMonitor.print(" OldTick: ");

void LogData(unsigned long commands[7], SerialData *sensors)  // data for spreadsheet
{
     Serial.print(sensors->speed_cmPs); Serial.print("\t");
     Serial.print(sensors->speed_cmPs*36.0/1000.); Serial.print("\t"); // km/hr
     Serial.print(sensors->angle_deg); Serial.print("\t");
     Print7 (true, commands);
}
