 #include "Arduino.h"
 // Be sure that the AltSoftSerial library is available, download it from http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html"
-#include <AltSoftSerial.h>
+#include "AltSoftSerial.h"
 
 
 #include "OBD9141.h"
 
-#define RX_PIN 8
-#define TX_PIN 9
+#define RX_PIN 8  // connect to transceiver Rx
+#define TX_PIN 9  // connect to transceiver Tx
+#define EN_PIN 10  //  pin will be set high (connect to EN pin of SN65HVDA100)
 
 AltSoftSerial altSerial;
 

    Serial.print("init_success:");
    Serial.println(init_success);

    init_success = true; // assume that the init was a success (for example with the simulator)

    if (init_success){
        bool res;

void setup(){
    Serial.begin(9600);
    delay(2000);
    pinMode(EN_PIN, OUTPUT);
    digitalWrite(EN_PIN, HIGH); // enable the transceiver IC.

    obd.begin(altSerial, RX_PIN, TX_PIN);

