[Ovmsdev] What happened to TPMS?

Wed Apr 22 14:05:01 HKT 2020

I think best to move to EAP and see if that improves the situation. On ‘edge’, you will be getting an update (and reboot) once every night or two.

Regards, Mark.

> On 22 Apr 2020, at 12:58 PM, Greg D. <gregd2350 at gmail.com> wrote:
> 
> Hi Mark,
> 
> Yes, I understand that.  Not expecting such a dramatic change as saving data in NV RAM.  The end user presumably won't have their module rebooting very often, so this isn't worth trying to save stuff across reboots.
> 
> I'm trying think back to when the behavior started to change.  It might have been when I moved off the Main branch to Edge because of the bug with OBD2ECU CAN initialization, so module reboots are far more frequent.  I'm tempted to get back on Main, or at least EAP, but I'm also vaguely remembering that there was a change related specifically to "stale" data that put a lot of data out of reach for a day.  This latest UI behavior change was the straw that caused me to write.
> 
> It seems like populating data takes a lot longer now than, say, 6 months ago.  Did something change a while back that has led to this?  Part of the puzzle, perhaps, is that we have two moving pieces, the Module and the App.  I'm on Android, if that matters.
> 
> Greg
> 
> 
> Mark Webb-Johnson wrote:
>> Greg,
>> 
>> I think the issue you have is that after a firmware update the module will reboot. That will mean it will lose the metrics for TPMS.
>> 
>> Those metrics won’t come back until the car has been driven.
>> 
>> I don’t see a simple solution. We could address it in v2 protocol by not sending the tpms message unless the metrics are defined, but that might still mess up the stale indicator. That wouldn’t affect the individual metrics and v3 protocol we are trying to move to for the future.
>> 
>> There is a small amount of RTC ram that is retained through a reboot. Perhaps we could have a mechanism to save+restore certain metrics there? But not at all simple.
>> 
>> Regards, Mark.
>> 
>>> On 22 Apr 2020, at 11:07 AM, Greg D. <gregd2350 at gmail.com <mailto:gregd2350 at gmail.com>> wrote:
>>> 
>>> Hi Mark, Michael,
>>> 
>>> I am on Edge, and it updated 2am local on the 20th (2 days ago).  Firmware: 3.2.011-13-g7d83320/ota_0/edge (build idf v3.3-beta3-775-gdc1ca69 Apr 20 2020 15:10:37).  The app is 3.16.1 (2020031801).
>>> 
>>> I just put the car in Drive for a few minutes, and all the stats got populated.  The car is off and sleeping now, so I'll check it again in the morning.  
>>> 
>>> Greg
>>> 
>>> p.s.  Just saw your EAP announcement.  With the 3.2.012 code coming, it will be interesting to see what happens after the reset.  I'll let you know!
>>> 
>>> 
>>> 
>>> 
>>> Mark Webb-Johnson wrote:
>>>> Greg,
>>>> 
>>>> What firmware version are you running in the module? If EAP/MAIN 3.2.011, can you try updating to the edge release? I suspect you are seeing the bug with 3.2.011 and the TPMS protocol v2 message.
>>>> 
>>>> Regards, Mark.
>>>> 
>>>>> On 22 Apr 2020, at 4:09 AM, Greg D. <gregd2350 at gmail.com <mailto:gregd2350 at gmail.com>> wrote:
>>>>> 
>>>>> Hi folks,
>>>>> 
>>>>> So, I seem to be going backwards with OVMS and my Tesla Roadster...
>>>>> 
>>>>> I'm looking at the OVMS app on my Android phone.  
>>>>> 
>>>>> Used to be that I'd see the TPMS data - pressure and temperature - as it was the last time the car was driven.  
>>>>> 
>>>>> Then it turned into zeros.
>>>>> 
>>>>> Today I see it's gone altogether.  This is not progress.
>>>>> 
>>>>> What I want to see is the data from the car, as last it was read.  I do not care that it is not live.  In fact, if it were live, that would mean that the car is in Drive, which (hopefully) means that I am in my car.  If so, I have no use for the OVMS, as the data is sitting right there on the car's display.
>>>>> 
>>>>> Is there any way to get the old functionality back?
>>>>> 
>>>>> Greg
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