SpeedCommand always returning speed of 52 even when not moving

[Abushawish]

Using ELM327. I think it may have something to do with the hex code that's being returned/parsed incorrectly. Thoughts?

[pires]

Probably some protocol issue.

[frandrago]

Hi, I do not know how to write in Inglés, but I am going to try.

I have the same problem, you've found the solution?

Thank you!!

[frandrago]

I have this problem when I use the Bluetooth ELM327 V2.1 ODBII.
With earlier versions do not have this problem.

[Pho3niX90]

@Abushawish @frandrago
Could you please supply your rawData value?

Easiest to do the above is edit the SpeedCommand.java
public String getCalculatedResult() { //return useImperialUnits ? String.valueOf(getImperialUnit()) : String.valueOf(getMetricSpeed()); return rawData }

[phamels]

@pires @Pho3niX90

Had the same issue using android-obd-reader (which uses obd-java-api)
The speed was displayed as a constant 65km/h while standing still and engine RPM of 4163.
Also the runtime was a constant 04:37:51.

A similar application (not to use any names) uses the protocol ISO15765-4CAN11/500 on this car & adapter combination but returns the data just fine.

Included the obd-java-api into the android-obd-reader project and changed the getCalculatedResult() to return the rawData though that didn't change anything to the data being displayed on the android-obd-reader app.

Anything I can do to test / help / give more data / results?

[Pho3niX90]

@phamels the library does not support the can protocol properly. So that would be your reason, however hopefully in the next month it will ;)

[pires]

@Pho3niX90 that would be truly amazing.

[phamels]

@Pho3niX90 aha ok, expected it would be something like that :-) that would be awesome :-) This is my first dive into the OBD protocols but if there's anything I could do to provide feedback or help in any way, let me know!

[Pho3niX90]

Thanks for the offer, it is taking longer than I initially anticipated, since all my vehicles are K-LINE, and cannot find a simulator that communicates solely in CAN. Thus making testing difficult. I will post a pull request for the speed command first to make sure it works for everyone.

[Pho3niX90]

@phamels if you could do me a favor though, if you could install a obd2 terminal app on your phone, and send a command to the OBD2 adapter, could you please post the response from the vehicle up?+

[phamels]

@Pho3niX90 was actually already preparing my laptop as you wrote this to do this :-) heading down to the garage as we speak to to that for you :-)

[phamels]

@Pho3niX90 as promised:

TeraTerm:

`

ATI
ELM327 v2.1
ATZ
ELM327 v2.1
ATSP6
OK
ATMA
STOPPED
ATCS
T:00 R:00
ATRV
11.2V
STI
?
0100
41 00 BE 3E A8 13
011c
41 1C 06`

Android OBD Terminal:

`

ATZ
ATZ

ELM327 v2.1

ATH1
ATH1
OK

ATDP
ATDP
ISO 15765-4 (CAN 11/500)

ATMA
ATMA
STOPPED

010D
010D
7E8 03 41 0D 00

010C
010C
7E8 04 41 0C 00 00

010C
010C
7E8 04 41 0C 0A A0

010C
010C
7E8 04 41 0C 0A 88

010C
010C
7E8 04 41 0C 0A B4
`

ATMA doesn't seem to return much data, neither on the android terminal or on the TeraTerm using windows

010C
010C
7E8 04 41 0C 00 00
--> Engine not running

010C
010C
7E8 04 41 0C 0A A0
--> Engine running

010C
010C
7E8 04 41 0C 0A 88
--> Engine running

010C
010C
7E8 04 41 0C 0A B4
--> Engine running

[Pho3niX90]

Was your RPM around 685?

[phamels]

Pretty sure it should be around there as I was just idling.
Could issue some more commands in various states if you want that

[Pho3niX90]

OKay. Could you please try that again for me.

First turn off the headers
ATH0

Then do RPM
010C