when i do

npm install bluetooth-obd

it try to compile something and throws error.

Hi Eric, Thank you for the excellent work. Now i can connect my OBD with my server. But i always get the Error: Error finding serialport: undefined before i can receive the data. As soon as this error is thrown the OBD will disconnect. Do you know how can i fix this Problem?

This library supports which parameters (such as rpm, speed) in a car for an obd to get values from?
I have already tested rpm, the speed with ELM327 OBD-II.
I also tried to test the fuel level input, but I got no response using this library. It showed no data!
Please let me know the parameters, soon.
Thanks

Hi,
I am creating a graphing app based off your library. The first time I connect to a device it works perfectly (Other than I had to remove the "replies" part of the string that gets added to the Queue. It seems like it always appends a 1 to every PID which would just make my ELM Simulator return nothing. Removing this makes it work.

However back to the issue, once I disconnect and reconnect it seems there are really weird concatenated messages being sent to the BT device.

Seems like something weird goes on after a disconnect that doesn't properly clean up. I have a hunch it is something to do with the intervalWriter which may go deeper into the way the btSerial lib is handling the buffers. But am struggling to debug that. I've tried just adding all the functions I could find that detach listeners, detach pollers, clear queue,etc..etc. None of it helped. If you disconnect again and reconnect the problem only compounds. See my 3rd screenshot.

Screenshot of Good Calls on first connect on OBD Device

Screenshot of Data receieved back in front end from OBD Device

Screenshot of calls being sent after disconnect and reconnect.

Screenshot of Data receieved back in front end from OBD Device after disconnect and reconnect.

After second disconnect and reconnect

You can find my project here which should demonstrate the issue.
https://github.com/Reiss-Cashmore/obdii-grapher

I am using Mac OSX if that helps.

Hello guys, i have a question does it control the signals? because I would like to play with them and make a little program for car to "dance" to music :))

Upon installation on raspbian the following error occurs

pi@raspi-car-01:~/testodb2 $ npm install --save bluetooth-obd

> [email protected] install /home/pi/testodb2/node_modules/bluetooth-serial-port
> node-gyp configure build

make: Entering directory '/home/pi/testodb2/node_modules/bluetooth-serial-port/build'
  CXX(target) Release/obj.target/BluetoothSerialPort/src/linux/BluetoothSerialPort.o
  CXX(target) Release/obj.target/BluetoothSerialPort/src/linux/DeviceINQ.o
../src/linux/DeviceINQ.cc:35:37: fatal error: bluetooth/bluetooth.h: No such file or directory
     #include <bluetooth/bluetooth.h>
                                     ^
compilation terminated.
BluetoothSerialPort.target.mk:105: recipe for target 'Release/obj.target/BluetoothSerialPort/src/linux/DeviceINQ.o' failed
make: *** [Release/obj.target/BluetoothSerialPort/src/linux/DeviceINQ.o] Error 1
make: Leaving directory '/home/pi/testodb2/node_modules/bluetooth-serial-port/build'
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:262:23)
gyp ERR! stack     at ChildProcess.emit (events.js:182:13)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:240:12)
gyp ERR! System Linux 4.14.79+
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "build"
gyp ERR! cwd /home/pi/testodb2/node_modules/bluetooth-serial-port
gyp ERR! node -v v10.14.2
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok

Please add to the installation that libbluetooth-dev is required as found on stackoverflow.com

Pre-requests on Linux

Needs Bluetooth development packages to build

$ sudo apt-get install libbluetooth-dev

It delayed the test for a hole day.

thank in advance.

Log

PS C:\Users\fjsolance\Desktop\MotorBikeControl\MotorBikeControlApp> npm install --save bluetooth-serial-port
npm ERR! code 1
npm ERR! path C:\Users\fjsolance\Desktop\MotorBikeControl\MotorBikeControlApp\node_modules\bluetooth-serial-port
npm ERR! command failed
npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c node-gyp configure build
npm ERR! gyp info it worked if it ends with ok
npm ERR! gyp info using [email protected]
npm ERR! gyp info using [email protected] | win32 | x64
npm ERR! gyp info find Python using Python version 3.10.4 found at "C:\Users\fjsolance\AppData\Local\Programs\Python\Python310\python.exe"
npm ERR! gyp ERR! find VS
npm ERR! gyp ERR! find VS msvs_version not set from command line or npm config
npm ERR! gyp ERR! find VS VCINSTALLDIR not set, not running in VS Command Prompt
npm ERR! gyp ERR! find VS could not use PowerShell to find Visual Studio 2017 or newer, try re-running with '--loglevel silly' for more details
npm ERR! gyp ERR! find VS looking for Visual Studio 2015
npm ERR! gyp ERR! find VS - not found
npm ERR! gyp ERR! find VS not looking for VS2013 as it is only supported up to Node.js 8
npm ERR! gyp ERR! find VS
npm ERR! gyp ERR! find VS **************************************************************
npm ERR! gyp ERR! find VS You need to install the latest version of Visual Studio
npm ERR! gyp ERR! find VS including the "Desktop development with C++" workload.
npm ERR! gyp ERR! find VS For more information consult the documentation at:
npm ERR! gyp ERR! find VS https://github.com/nodejs/node-gyp#on-windows
npm ERR! gyp ERR! find VS **************************************************************
npm ERR! gyp ERR! find VS
npm ERR! gyp ERR! configure error
npm ERR! gyp ERR! stack Error: Could not find any Visual Studio installation to use
npm ERR! gyp ERR! stack at VisualStudioFinder.fail (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-visualstudio.js:122:47)
npm ERR! gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-visualstudio.js:75:16
npm ERR! gyp ERR! stack at VisualStudioFinder.findVisualStudio2013 (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-visualstudio.js:363:14)
npm ERR! gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-visualstudio.js:71:14
npm ERR! gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\find-visualstudio.js:384:16
npm ERR! gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\util.js:54:7
npm ERR! gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\util.js:33:16
npm ERR! gyp ERR! stack at ChildProcess.exithandler (node:child_process:406:5)
npm ERR! gyp ERR! stack at ChildProcess.emit (node:events:526:28)
npm ERR! gyp ERR! stack at maybeClose (node:internal/child_process:1092:16)
npm ERR! gyp ERR! System Windows_NT 10.0.19042
npm ERR! gyp ERR! command "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" "configure" "build"
npm ERR! gyp ERR! cwd C:\Users\fjsolance\Desktop\MotorBikeControl\MotorBikeControlApp\node_modules\bluetooth-serial-port
npm ERR! gyp ERR! node -v v16.14.2
npm ERR! gyp ERR! node-gyp -v v8.4.1
npm ERR! gyp ERR! not ok

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\fjsolance\AppData\Local\npm-cache_logs\2022-05-20T11_48_07_556Z-debug-0.log

Hi,

I have been experimenting with this in Node Red trying to utilise it using the Node Red NPM node.
Having little to no luck at all and was wondering have you experimented with this and been able to get it to work?

Timing new responses should be improved.

Hi,

I've a ELM327 connected to a raspberry. Succesfully paired and trusted.
When I'm running the demo code, data is always empty. Console shows rows with {} What's going wrong?

Thanks in advance!

I'm not having much luck getting the VIN. I made it a little further by adding this in obd.js

else if (valueArray[0] === "49") {
        reply.mode = valueArray[0];
        for (var i = 0; i < PIDS.length; i++) {
			console.log('pid length:', PIDS.name);
            if (PIDS[i].mode == "09") {
                reply.name = PIDS[i].name;
				reply.value = PIDS[i].convertToUseful(hexString);
				console.log('value:', reply.value);
            }
        }
    } 

Any suggestions as it stands I do not believe the methods for getting VIN actually work... or am I mistaken?

Hi Eric,

Do you know if there is anyway to integrate this repo into the cordova / ionic framework for hybrid app development?

http://ionicframework.com/
https://cordova.apache.org/

Thanks in advance,

Chris

Unable to use this for the moment. Please help
Ubuntu 14 is the OS used

Details:
_modules/bluetooth-serial-port/build'
CXX(target) Release/obj.target/BluetoothSerialPort/src/linux/BluetoothSerialPort.o
CXX(target) Release/obj.target/BluetoothSerialPort/src/linux/DeviceINQ.o
../src/linux/DeviceINQ.cc:35:37: fatal error: bluetooth/bluetooth.h: No such file or directory
#include <bluetooth/bluetooth.h>
^
compilation terminated.
make: *** [Release/obj.target/BluetoothSerialPort/src/linux/DeviceINQ.o] Error 1
make: Leaving directory /home/home/node_sundar/node_modules/bluetooth-obd/node_modules/bluetooth-serial-port/build' gyp ERR! build error gyp ERR! stack Error:make` failed with exit code: 2

When testing the module as-is, and setting a poll on rpm, I get OKs for the sets, and then empty objects for all of the poll results:

{ value: 'OK' }
{ value: 'OK' }
{ value: 'OK' }
{ value: 'OK' }
{ value: 'OK' }
{ value: 'OK' }
{}
{}
{}
...

Based on testing/reading, it looks like the problem is the ATZ (ELM327 chip reset) being commented out. Is there a reason for that? Things work for me when it's un-commented.

        //self.write('ATZ');
        //Turns off extra line feed and carriage return
        self.write('ATL0');
        //This disables spaces in in output, which is faster!
        self.write('ATS0');
        //Turns off headers and checksum to be sent.
        self.write('ATH0');
        //Turns off echo.
        self.write('ATE0');
        //Turn adaptive timing to 2. This is an aggressive learn curve for adjusting the timeout. Will make huge difference on slow systems.
        self.write('ATAT2');
        //Set timeout to 10 * 4 = 40msec, allows +20 queries per second. This is the maximum wait-time. ATAT will decide if it should wait shorter or not.
        //self.write('ATST0A');
        //Set the protocol to automatic.
        self.write('ATSP0');

Using the code in your sample. Device is being found, but connection is failing.

Error Below:

Debug: Found device: OBDII (00:0D:18:06:00:00)
Debug: Found device channel: 16
connected
Error: Error with OBD-II device: Error: Cannot connect

Hi Eric,

Amazing library really getting to grips with it, however there is one strange issue I'm having.
I have adapted the code to work in a hybrid app but whenever I send a command to the OBD device it returns the data in an inconsistent chunk of results, example:

Me: 010C
OBDII:
OBDII: 4
OBDII: 3C
OBDII: 3
OBDII: 3C C
OBDII: 3C
OBDII:
OBDII:
OBDII: >

It is a similar issue to this stackoverflow post: http://stackoverflow.com/questions/25374953/bluetoothchat-to-elm327-split-response-message

Although the solution there appears to be in Java.

I have a work around where I loop over the results adding the relevant parts together then when i receive a ">" command I stop as i know its finished.

Have you ever come across this before?

Thanks again for the library and any help,

Chris

Can we Detect Accident Using ELM327 OBD2

Hi,
I'm a little confused on how to connect to a device, I have this one:

info 34:81:F4:D2:43:2C
Device 34:81:F4:D2:43:2C (public)
	Name: VEEPEAK
	Alias: VEEPEAK
	Class: 0x00240404
	Icon: audio-card
	Paired: yes
	Trusted: yes
	Blocked: no
	Connected: no
	LegacyPairing: yes
	UUID: Serial Port               (00001101-0000-1000-8000-00805f9b34fb)
	UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
	Modalias: bluetooth:v0039p5056d0120
	RSSI: -84

I have tried the commands:
btOBDReader.autoconnect('34:81:F4:D2:43:2C');
btOBDReader.autoconnect('VEEPEAK');
btOBDReader.autoconnect('veepeak'); - just in case it was case sensitive
btOBDReader.connect('34:81:F4:D2:43:2C', 1); - as I have no idea what the port is...

Any ideas?

Thanks,
Jamie

Can this be adapted to the wifi serial interface? 192.168.0.10:35000