OBDSim Connection with Android Device over Bluetooth on Windows 8.1

Question

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 odb-ii chip.

I found OBDSim to create sample data and answer the requests that send by my application. I encountered many problems and solved these problems by reading many documents and blog post. But I have last one problem and I need to your helps.

New version of OBDsim support Windows for Bluetooth connection now with using com0com. When I install com0com, I faced signature problem and I solved this problem to disable related windows feature. I have also set incoming port of Bluetooth to COM4. Everything are good so far. After that I want to create virtual ports by using com0com. It already create one pair when install. They are CNCA0 and CNCB0. I am only trying to change second port of this pair from CNCB0 to COM4. But windows gives error about COM4 is already using. Still I completed and assign COM4 instead of CNCB0. After that I run obdsim.exe and it start to create log like this;

SimPort name: CNCA0  
Successfully initialised obdsim, entering main loop  
10.046624 seconds. 0 samples, 0 queries. 0.00 s/s, 0.00 q/s  
10.049810 seconds. 0 samples, 0 queries. 0.00 s/s, 0.00 q/s  
10.049377 seconds. 0 samples, 0 queries. 0.00 s/s, 0.00 q/s

In this duration, I started to android application and press start live data button. I give and error on android phone about Bluetooth Connection Error - read failed, socket might closed or timeout. This is one scenario.

In second scenario, I removed the break com0com and I directly connect OBDsim to COM4. And I run obdsim.exe again. It also hava same output as before scenario. After I started t android application output change like this.

Echo disabled
Echo disabled
Echo disabled
10.066543 seconds. 0 samples, 6 queries. 0.00 s/s, 0.60 q/s
Echo disabled
Echo disabled
Echo disabled
Echo disabled
Echo disabled
10.030909 seconds. 0 samples, 5 queries. 0.00 s/s, 0.50 q/s
Echo disabled
Echo disabled
Echo disabled
Echo disabled
Echo disabled
Echo disabled
10.034040 seconds. 0 samples, 6 queries. 0.00 s/s, 0.60 q/s
Echo disabled
Echo disabled
Echo disabled

And I cant see any changes on my application.

If you know what is the problem or something that I made mistake or I forget, I am waiting or your help.

Thanks.

Answer 1

Okey. I solved my problem about this topic.

First of all, com0com is not necessary to communicate with OBDSim on Windows. I can successfully connect to my application and OBDSim and I can see values on my android phone screen.

My problem was about OBD Reader program on Android. I didn't understand the reason of this situation but OBDSim couldn't connect to all OBD readers. I suggest you to use torque lite android application when you try connect OBDSim. And you should be careful on order of process.

• Firstly, you should make pair your computer and mobile phone. (Sometimes it is necessary to remove pair and make pair again.)
• After that you should run > obdsim.exe -w COMx (x is your Bluetooth income port name. You can set this port on your PC's Bluetooth settings -> Com Ports)
• Lastly you should open your application and try to connect your computer by Bluetooth.

This solution works for me. You can try other application.

Thanks, M. Salih.