[Ovmsdev] Active GPS power consumption

[Michael Balzer]

Mark,

in the thread with Patrick Stein I measured the GPS antenna at ~ 5 mA / 
55 mW, and added that info to 
https://docs.openvehicles.com/en/latest/userguide/warnings.html#average-power-usage

> *GPS*consumption includes the active GPS antenna, which accounts for ~ 
> 5 mA / 55 mW. Antenna power cannot be switched by the module.
>
> ESP32*deep sleep mode*(e.g. triggered by the power management module) 
> reduces the consumption to ~ 15 mA / 165 mW with the active GPS 
> antenna attached, or ~ 10 mA / 110 mW with the GPS antenna detached. 
> The hardware isn’t capable to go any lower than this.
>

But maybe you can do a more precise measurement, I only have some basic 
electronics tools here.

Regards,
Michael


Am 31.01.23 um 01:53 schrieb Mark Webb-Johnson:
>
> Re: https://www.openvehicles.com/node/3545
>
> I think it worthwhile having this discussion here. Synopsis seems to be:
>
>  1. Our modem design uses the SIMCOM reference design to power the
>     active GPS antenna from VBAT. This increases power consumption
>     (powering the active antenna), even if the GPS is turned off in
>     software.
>
>  2. There is an alternative approach using pin 44 and the AT+CVAUXV /
>     AT+CVAUXS commands to enable/disable and/or adjust voltage.
>
>
> Would be interesting to see the exact power readings and impact this 
> change would make. I will try to get these this weekend.
>
> Regards, Mark
>
>
>
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> OvmsDev at lists.openvehicles.com
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-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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