[Ovmsdev] DIAG port to bluetooth

[Giannis Bakas]

Mark,

I read in the OVMS_Development.pdf (git hub) this:

So you've got about 20 seconds after powering the module / reset to send the
magic word. You may send the word as often as you want, the module will
normally respond to it after the first modem init (i.e. after "Call 
Ready" / "GPS
Ready"). If it does not, reboot.

Once you're in DIAG mode, enter:
. "HELP" to list available commands (also lists SMS and MSG commands)
. "DIAG" to see a short status overview
. "S command" to execute an SMS command
. "M command" to execute a MSG command

In DIAG mode, all SMS and MSG outputs are sent to the DIAG port instead 
of the
GPRS network. MSG output will not be encrypted.

and I thought that it was possible. I don't want the modem but I am not 
a specialist
in electronics and embeded systems. My first thought was to use an 
ELM237 to get
data from OBDII but I can not find the PIDs of Twizy and I thought of 
using this interface
like I would with ELM. Just send a command via bluetooth and get back a 
response.

Regards, Giannis

PS: Thanks again for the support!

On 21/6/2013 07:55, Mark Webb-Johnson wrote:
> Giannis,
>
> As the DIAG port is just a tap (not a separate port), I don't think 
> you will have much success just spoofing commands into it.
>
> Do you need the modem? If not, you can wire up instead of the modem 
> and adjust firmware as necessary.
>
> Regard, Mark.
>
> On 20 Jun, 2013, at 9:42 PM, Giannis Bakas wrote:
>
>> Thank you Mark for your quick reply,
>>
>> I have made a connection (SPP) with a bluetooth connected to my PC 
>> from parrot and seems
>> to work fine.
>>
>> My question was if DIAG port would work with a bluetooth serial 
>> adapter. And working on DIAG
>> MODE I can send SMS or MSG commands to get data like SOC, speed, gps 
>> position.
>>
>> Cheers Giannis
>>
>> On 20/6/2013 11:56, Mark Webb-Johnson wrote:
>>> Giannis,
>>>
>>> You are having the same problem as me - we both have Parrots in our 
>>> cars :-)
>>>
>>> Work I have done on this so far:
>>>
>>>   * I investigated USB serial adaptors to the Parrot. The FTDI
>>>     driver is in the Parrot Android, but there are some problems
>>>     with loading it (you can hack it from the adb shell, or from an
>>>     App with root access). Parrot themselves say it is not yet
>>>     supported, but planned for future.
>>>
>>>   * I investigated bluetooth. Prior to the latest firmware it didn't
>>>     work at all. With the latest 2.1.1 firmware I have had more
>>>     success. I managed to get bluetooth to my Pebble smartwatch
>>>     working (which means I can control Parrot volume from my wrist),
>>>     but so far I haven't managed to get bluetooth SPP working. It
>>>     should work, so maybe just me,
>>>
>>>   * From the OVMS hardware point of view, things are not so easy.
>>>     The PIC18F is very limited and it is hard to get extra
>>>     connections. It should be possible to disconnect the connection
>>>     to the modem and instead go to a bluetooth module on that single
>>>     ASYNC port (both 5v and 3.3v lines are available on the OVMS v2
>>>     board). I have heard, but not tried, that it might be possible
>>>     to get a software async working on one of the free I/O pins -
>>>     low baud rate with no flow control.
>>>
>>>   * I am working on more sophisticated hardware with 6 ASYNC ports
>>>     and 2 CAN buses! But, the bluetooth situation is a mess at the
>>>     moment (Android supports bluetooth 2.2 but not BLE 4.0, and
>>>     iPhone supports BLE 4.0 but not bluetooth 2.2 - good grief).
>>>
>>>
>>> If you don't need the modem, the easiest would be to try to cut the 
>>> RX+TX lines from the PIC to the MODEM and use them for your 
>>> bluetooth module. The comms is at 9600 baud.
>>>
>>> Regards, Mark.
>>>
>>> On 20 Jun, 2013, at 3:41 PM, Giannis Bakas wrote:
>>>
>>>> Hi all,
>>>>
>>>> is it possible to use a serial to bluetooth dongle on the DIAG port 
>>>> of the module
>>>> to get data via bluetooth, requesting data with "MSG commands"? 
>>>> What I want
>>>> to do is to use OVMS like a bridge between my car and my parrot 
>>>> device (Android device)
>>>> in order to visualize the data I get to the screen. I want to avoid 
>>>> the SIM card and to get
>>>> data from the server.
>>>>
>>>> Best regards,
>>>> Giannis
>>>>
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>>>
>>>
>>>
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>>
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