Obd II

Gabe1321

This is for dudu obd which doesn't work with torque app
https://drive.google.com/file/d/1KNSyzSo3cDaKlGm9JvPfWh3SfhuqDk17/view?usp=drivesdk

Mikescotland

Gabe1321 have you paired Dudu obd to any other device? Like phone? If so, unpair it (even if it's not connected at the moment to the phone), then unplug, plug back and then try to pair to android Bluetooth.

DUDU-Meng

Gabe1321
I think you still don't understand how OBD connections work. It can only have one active data connection at a time. Once you connect using that app with the unknown name, other apps won't be able to connect. Conversely, if you connect using DUDU, your app won't be able to connect successfully either.
I can definitively state that all the issues you've raised stem from your own operational mistakes. If you wish to use a third-party app for connection, please refrain from using DUDU for connection. If you use DUDU, you cannot simultaneously use a third-party app to connect to this OBD. The OBD's Bluetooth can only connect to one app at a time.

DUDU-Meng

Gabe1321
Once again, I must reiterate: DUDU's OBD should not be connected here.
I've emphasized this multiple times already, yet for some reason you persist in connecting it here.

Mikescotland

DUDU-Meng could be. But if you look at the second video, Dudu obd is not connected to DuduOS, yet can't be paired to android BT system. Which in theory should be possible if the dongle isn't paired already to something else (like a phone, which I hinted to the OP).

DUDU-Meng

Mikescotland
I've seen the second video. I can only guarantee compatibility with DUDU and the third-party apps bundled with OBD. It's clear he used other third-party apps to connect to the app, which means third-party apps won't work.
Since the third-party app is already connected to OBD, DUDU simply won't connect successfully.

benzol

DUDU-Meng connect the OBD of DUDU to DUDU OS, and the OBD of the 3rd party connect to the Android system?

DUDU-Meng

benzol
I believe I've made myself quite clear: DUDU OBD does not support connecting via the Bluetooth settings on Android devices. Based on your previous response, it seems you're attempting to use two OBD devices simultaneously. Your vehicle does not support simultaneous data transmission from two OBD devices. While you could use a splitter adapter, your vehicle absolutely will not support transmitting data to both OBD devices—it can only transmit to one at a time.
There are no issues with either the hardware or software; the problem lies solely with your own operation.

benzol

DUDU-Meng I edited my post because it wasn't written properly (for which I apologize)

Mikescotland

DUDU-Meng that's not true, stop making unfounded claims.
The car will happily provide data to both obd adapters via splitter at the same time.
In my car I have: 2 obd Bluetooth adapters and DIY canbox which take a few data from obd protocol as well as they are not available on CAN protocol.
All of them working fine and provide data at the same time.

DUDU-Meng

Mikescotland Perhaps your car brand can, but 99% of vehicles do not support transmitting identical data to two OBDs simultaneously unless different data streams are transmitted separately.
If both OBDs read the same data—such as RPM, coolant temperature, etc.—only one can function while the other will display no data.
I've been working with OBD systems for quite some time now, and I haven't encountered a single car capable of transmitting identical data streams to two OBD ports simultaneously. It only works with two entirely different OBD functions—for example, one OBD port for automatic window/door locking and anti-theft, while the other reads engine data.
If a car comes factory-equipped with two OBD ports, it might be possible. However, using an adapter to split one port into two cannot simultaneously read engine data.

Mikescotland

DUDU-Meng looking at users corrections to your obd protocol knowledge in other threads, I tend to disagree.
We're not talking about service sessions via obd which put the car into service mode but simple rpm, temperature, speed etc values which are available on OBD protocol regardless of this mode.
Well, you've now seen one car, Renault clio III from 2011 where basic data on OBD don't require any service mode.

DUDU-Meng

Mikescotland
He used an OBD splitter to split the OBD port into two interfaces, plugging in two OBD devices. These two OBDs cannot read engine data simultaneously—at least, I haven't encountered a vehicle that allows two OBDs to read engine data at the same time.
However, his goal was to use both OBDs simultaneously. Once one OBD successfully connected and read engine data, the other OBD would lose its data connection.

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