Hi,
Could you please tell me what the threshold is for the Battery Low Alarm being activated on the WLL. Is this configurable at all?
Regards,
Trevor
Welcome to the Cumulus Support forum.
Latest Cumulus MX V4 release 4.0.1 (build 4023) - 16 May 2024
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Latest Cumulus MX V4 release 4.0.1 (build 4023) - 16 May 2024
Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024
Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Low battery alarm
Moderator: mcrossley
- ConligWX
- Posts: 1657
- Joined: Mon 19 May 2014 10:45 pm
- Weather Station: Davis vPro2+ w/DFARS + AirLink
- Operating System: Ubuntu 24.04 LTS
- Location: Bangor, NI
- Contact:
Re: Low battery alarm
the battery warning comes from the WLL itself, so you cant set a battery warning limitation from within CumulusMX. have a look in the WeatherLink app or WeatherLink itself, but I doubt there will be a configuration to change what Davis deems as low voltage.
Both The User Manual and Spec Sheet show no threshold. you will need to chat with Davis themselves to find out that information. I've just replaced mine about a month ago, but I couldn't remember the voltage level, just the warning alarm, so then I just changed the batteries.
all my email said was:
Code: Select all
Cumulus MX alarm has been triggered.
A low battery condition has been detected.
Regards Simon
https://www.conligwx.org - @conligwx
Davis Vantage Pro2 Plus with Daytime FARS • WeatherLink Live • Davis AirLink • PurpleAir • CumulusMX v4.0.0
https://www.conligwx.org - @conligwx
Davis Vantage Pro2 Plus with Daytime FARS • WeatherLink Live • Davis AirLink • PurpleAir • CumulusMX v4.0.0
- mcrossley
- Posts: 12880
- Joined: Thu 07 Jan 2010 9:44 pm
- Weather Station: Davis VP2/WLL
- Operating System: Bullseye Lite rPi
- Location: Wilmslow, Cheshire, UK
- Contact:
Re: Low battery alarm
Actually the WLL does not send a flag only a voltage. I have used < 5.4V as the threshold = 1.35V per cell. Which gives a reasonable usable capacity left.
Remember these are backup batteries not service batteries, so they need a good usable capacity if they are to be any use. If they were service batteries, then the threshold would be lower and close to the point exhaustion.
My gripe is the WLL seems to still deplete the batteries slowly when it is running on external power
Remember these are backup batteries not service batteries, so they need a good usable capacity if they are to be any use. If they were service batteries, then the threshold would be lower and close to the point exhaustion.
My gripe is the WLL seems to still deplete the batteries slowly when it is running on external power
- PaulMy
- Posts: 3875
- Joined: Sun 28 Sep 2008 11:54 pm
- Weather Station: Davis VP2 Plus 24-Hour FARS
- Operating System: Windows8 and Windows10
- Location: Komoka, ON Canada
- Contact:
Re: Low battery alarm
CMX has been giving me low battery warning 0.07 V for a while now. Weatherlink.com shows Input Voltage 4.7 V and Battery Voltage 0.1 V. I checked the batteries on my very basic voltage meter and they show Good. I ordered new batteries a week ago and they also show as Good on my meter, and put them in the WLL. The low battery messages and 0.1 V on WL.com continued so I contacted Davis support, and their reply:
I must get me a decent voltage meter before I consider sending the WLL in to Davis ... I really know nothing about voltage meters, any recommendation?
Enjoy,
Paul
Code: Select all
Paul,
Are you sure there is no corrosion that needs to be cleaned off the battery terminals? Also, is the battery door getting closed properly? If you've check this already, your device may need to come in for repair, call us at 510-732-7814
Enjoy,
Paul
VP2+
C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm
C1 www.komokaweather.com/komokaweather-ca
MX https://komokaweather.com/cumulusmx/index.htm /index.html /index.php
MX https://komokaweather.com/cumulusmxwll/index.htm /index.html /index.php
MX https:// komokaweather.com/cumulusmx4/index.htm
- mcrossley
- Posts: 12880
- Joined: Thu 07 Jan 2010 9:44 pm
- Weather Station: Davis VP2/WLL
- Operating System: Bullseye Lite rPi
- Location: Wilmslow, Cheshire, UK
- Contact:
Re: Low battery alarm
Paul, I'd say any cheap meter should be good enough for that purpose.
-
- Posts: 226
- Joined: Thu 17 Dec 2020 9:06 am
- Weather Station: Davis Vantage Vue
- Operating System: Raspbian GNU/Linux 10 (buster)
- Location: Tin Can Bay, Queensland, Australia
- Contact:
Re: Low battery alarm
Thanks everyone for the responses. I thought it was set at 5.4V but wanted to confirm and also find out if it was configurable. Time for battery replacement obviously.
Regards,
Trevor
Regards,
Trevor