Bluetooth communication with OBDII device

[Gabriel Esteves]

Hi. I am an App Inventor beginner and need help. :)

I'm trying to develop an android app that communicates with an OBD II device with bluetooth integrated (ELM 327).

My app is already communicating with the OBD II device and I am trying to send a code to request the RPM of the vehicle (PID 010C) but the ELM327 does not return the correct answer, it returns the same code that I sent.

nke in my app), but the terminal has the option \r\n to send the PID code with this command and when I check this option the ELM 327 returns a correct answer.

Conclusion: Maybe I am not sendind the \r\n command in my app and I trying a lot to send it, but it don't works.

I send 01 0C and expects the answer 41 01 xx xx , where xx xx is the rpm in hexadecimal.

Anyone can help me how to resolve this problem?

My last block is in the image attached.

Thanks!

[Alessandro Augusto Bovolenta]

Uses bluetooth.send1ByteNumber Number 13

not bluetooth.sendtext text "\n"

[Jake White-Rowell]

Hi

How did you manage to get the app to connect with the ELM 327?

When I try it, I get error message 507?

Thanks for your help!

Jake

[Keerthi Manikonda]

Hello!

I am working on an app that connects to the OBDII device to monitor driving habits. I do not know where to start exactly when it comes to the connection with the device and retrieving information from the device. I am a very amateur coder and would really appreciate your help and guidance. I would like to know how ti get the connection going and how to retrieve information from the device and display it in the app.

Thank you!

Keerthi