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Questions tagged [obd-ii]

OBD-II is an automotive term referring to the diagnostic system of a car. The OBD-II specification includes standardized hardware and message protocols. With an OBD-II connector, it's possible to read the diagnostic data from the car, e.g., vehicle speed, RPM, mileage, airflow.

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323 questions
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OBD Mode 07 Multi-Frame

I am trying to parse the message coming from an OBD device for Mode 07, and I am having a tough time with it. The following is the response I get from the device. 00 10 08 10 0A 47 04 01 07 02 07 00 10 08 21 03 07 43 07 00 00 00 00 18 06 47 02 01…
Clay
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How can I send ELM327 commands to my OBDII adapter through Bluetooth?

So i'm making a OBDII Bluetooth app were the user can send commands such as voltage (in this case) and get data from the OBDII. So far i've managed to make a Bluetooth connection with my mobile device to my OBDII adapter work and now I need to send…
swess
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Android Bluetooth OBDII communication

I'm out of ideas as to what is wrong with this. I'm trying to send and receive data from my bluetooth ELM327. Torque works, and I've used a terminal app to send commands and that also returns correct results. So I don't get what I'm doing wrong…
Tony Shepherd
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Regular Expression for specific VIN Pattern

I want to learn a bit about regular expressions. I have a String that represents the Vehicle Identification Number (VIN) in hexadecimal code. The problem is, that the string will have a different pattern, depending on the car I am using to get it.…
Fr3ak1n0ut
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OBD communication through USB

I am currently working on an app which intents to read data from the ECU through OBD and I would like to use USB adapter which I would connect to my phone. Problem is that I see bluetooth based libraries everywhere. Is there anybody willing to help…
Helmisek
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What information can i get from OBD II?

I can get the below information from OBD II through ELM 327 adapter. RPM Vehicle speed Engine Load Coolent Temperature I would like to know what else i could get from OBD II.
Sankar M
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OBD Response for 01 0D is not recognized

Trying to build a small app via PhoneGap which connects to OBD via BlueTooth and just getting the current speed. It works fine on one of my test adapters but the second one gives weird responses (both are v1.5): SENT ATZ 15:32:02.421 "ELM327…
jonas
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Can't read data from OBD2 serial port connection on Raspberry Pi

I'm currently working on a raspberry pi project for school where I read data from an OBD2 to usb censor in my car. When I'm using Screen to connect to the serial port everything works fine, but when I try to do it in python the serial.readline()…
jeroenvdbergh
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Problems in getting RPM message from OBD2

I am new in OBD2 programming. I have my device connected through serial port to OBD2. I try request RPM or Speed messages and getting "SEARCHING..." or "NO CONNECT" messages instead of a RPM/Speed values. I tried to send "ATZ" and even "ATSP00"…
Vugar
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OBDII - determine gear given speed and RPM

I'm developing an Android application where we use the OBDII to read car's engine parameters. Currently we are obtaining speed (kmh), engine's RPM and mass airflow live while driving the car. We now have to find a way how using these parameters we…
Dawid Sibiński
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BluetoothSerial cordova plugin echoing write

I'm using BluetoothSerial to connect an Android phone to an ELM327 OBD dongle. I have used a Bluetooth chat app to confirm that the appropriate data is returned on sending PID command codes (like 010C, 0105, etc.). However, while the bluetoothSerial…
Sohan Dsouza
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Setting pins of RS232 using SerialPort .NET without overhead

I want to set DTS and RTS pins to true/false in .NET using SerialPort-Class. When setting pins to true/false and sniffing COM-Port there are alot of other things send to the COM-Port that I don't want. Sniff-Log:…
nodna
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OBD-ii Reader freezing and not real time

I'm working on a OBD-ii Reader. I am using a basic bluetooth chat to communicate with the OBD-ii device, regular expressions to capture the replies and displaying them in text views. This is where I send the PID code's to request the data: public…
user3010383
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Can I build a Web App using OBD II

I'm looking to create a web application that can show car metrics and help the user improve his car performance. After some basic googling i came to know about OBD. I've seen about the android apps that use OBD but I've come across any thing that…
Strikers
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OBDSim Connection with Android Device over Bluetooth on Windows 8.1

I have worked since last day on this topic. I want to develop android application about obd-ii scanner. There are many open source project on Github or Google Codes. I have to find obd-ii simulator to developed this application without car or any…
MSalihKarakasli
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