Forum >How to use softwareSerial with OBD-II Adapter?
How to use softwareSerial with OBD-II Adapter?
wahmalik85 2014-01-25 22:26:08 4999 Views2 Replies I have an Arduino Uno, and I already use Serial with GSM/GPRS/GPS shield and I'd like to add softwareSerial that connect with OBD-II Adapter, how can I make OBD RX goes to Arduino softwareSerial TX on pin 12?
:)
:)
2014-01-28 00:42:15 Hi all,
I included the library of SoftwareSerial.h in OBD.cpp file:
[code]#include <Arduino.h>
#include <avr/pgmspace.h>
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
#include "OBD.h"[/code]
and modified the original serial of uno to software serial in OBD.h file in the line 17
[code]#ifndef OBDUART
#if defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega644P__)
#define OBDUART Serial1
#else
#define OBDUART mySerial
#endif
#endif[/code]
and it complied successfully.
But when I attach the OBD adapter to software serial, the communication between OBD adapter and Arduino is faild and stuck on this loop:
[code]// initiate OBD-II connection until success
while (!obd.init()); [/code]
is there any solution for this?
thank you. wahmalik85
I included the library of SoftwareSerial.h in OBD.cpp file:
[code]#include <Arduino.h>
#include <avr/pgmspace.h>
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
#include "OBD.h"[/code]
and modified the original serial of uno to software serial in OBD.h file in the line 17
[code]#ifndef OBDUART
#if defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega644P__)
#define OBDUART Serial1
#else
#define OBDUART mySerial
#endif
#endif[/code]
and it complied successfully.
But when I attach the OBD adapter to software serial, the communication between OBD adapter and Arduino is faild and stuck on this loop:
[code]// initiate OBD-II connection until success
while (!obd.init()); [/code]
is there any solution for this?
thank you.
wahmalik85 