[Ovmsdev] Power usage / sleep mode

[Michael Balzer]

Done :-)

Also, as the Twizy (and I suppose other cars as well) charges the 12V 
battery further on as long as it's plugged in, I now use the plug in 
status (car_linevoltage + car_chargecurrent) to detect a 12V charge status.

After plug-out, the OVMS waits for 10 minutes (time for the 12V battery 
to calm down) until taking the new ref voltage. That will still be a bit 
above the nominal voltage, but the span should be short enough to allow 
for taking a new ref even if taking the car for the next drive soon 
after charging.

I hope this will work on other cars as well without change/config, but 
it will now need the car_linevoltage and car_chargecurrent reflecting 
the actual plugin status. If a car cannot provide this info, we can 
introduce a new vehicle hook for a function that checks for a valid 
calibration time.

Regards,
Michael


Am 26.01.2013 22:05, schrieb Michael Balzer:
> I've got a flaw in there: as the code begins taking ref max values 
> right after charging ends, the ref gets too high. After charging my 
> current ref is now 14.7 due to that bug, should be around 12.7.
>
> I need to factor in the voltage decay after end of charge. I'll see if 
> I can get that in without introducing a new timer variable...
>
> @Mikeljo: "> 13" is correct (just ensures ref-13 > 0), your change to 
> "> 130" is not correct, as the ref can be much lower.
> ...also consider using stp_l2f() for the STAT message, see the DIAG 
> message for a copy source.
>
> I really should document the stp functions...
>
> Regards,
> Michael
>
>
> Am 25.01.2013 17:16, schrieb Mark Webb-Johnson:
>> Michael,
>>
>> Seems like a sensible approach.
>>
>> Your car is now showing "11.9,0,12.2".
>>
>> I'll try it in my car over the weekend.
>>
>> Regards, Mark.
>>
>> On 25 Jan, 2013, at 9:16 PM, Michael Balzer <dexter at expeedo.de> wrote:
>>
>>> Mark, Tom,
>>>
>>> I just checked in the auto calibration implementation.
>>>
>>> It works by taking the maximum voltage reading while the car is off 
>>> and not charging as the reference voltage, so it should adapt to all 
>>> possible variations.
>>>
>>> Alert is triggered if current reading is at/below ref - 1.3V, which 
>>> should fit for all cases.
>>>
>>> The alert now also includes the reference, and it can be queried by 
>>> the "DIAG" SMS command. It's also now included as a new field in the 
>>> environment message ("D").
>>>
>>> Regards,
>>> Michael
>>>
>>>
>>> Am 22.01.2013 04:19, schrieb Mark Webb-Johnson:
>>>> Tom,
>>>>
>>>> My understanding is that the 2.x cars work the same way. The 12V 
>>>> battery is just for emergency systems.
>>>>
>>>> Presumably if the main pack fails (fuse blows, whatever), the 1.5 
>>>> cars have no way of running hazard warning lights, brake lights, etc.
>>>>
>>>> It would still be useful to see the stability of that 12V line, on 
>>>> the v1.5 Tesla Roadsters.
>>>>
>>>> Regards, Mark.
>>>>
>>>> On 21 Jan, 2013, at 12:48 AM, Tom Saxton <tom at idleloop.com> wrote:
>>>>
>>>>> on 1/19/13 10:08 PM, Mark Webb-Johnson wrote:
>>>>>
>>>>>> If anyone has a 1.x roadster with a v2 hardware module, and has 
>>>>>> recently
>>>>>> parked it for some days, it would be helpful if you could send me 
>>>>>> the
>>>>>> date/time range and your vehicleid.
>>>>> I don't think the v1.5 Roadster has a 12V battery. It's my 
>>>>> understanding
>>>>> that it uses a DC-to-DC converter on one of the ESS sheets to 
>>>>> power the 12V
>>>>> systems when the car is off.
>>>>>
>>>>>     Tom
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> OvmsDev mailing list
>>>>> OvmsDev at lists.teslaclub.hk
>>>>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
>>>> _______________________________________________
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>>> -- 
>>> Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
>>> Fon 0202 / 272 2201 * Handy 0176 / 206 989 26
>>>
>>> <dexter.vcf>_______________________________________________
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>>> OvmsDev at lists.teslaclub.hk
>>> http://lists.teslaclub.hk/mailman/listinfo/ovmsdev
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>
>
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-- 
Michael Balzer * Paradestr. 8 * D-42107 Wuppertal
Fon 0202 / 272 2201 * Handy 0176 / 206 989 26

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