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Calibrating extra sensor and adding a display

Discussion of version 3 of Cumulus, which runs on Windows, Linux, and OS X. All Cumulus MX queries in here, please.
Jonathan Jefferies
Posts: 25
Joined: Fri Apr 22, 2016 5:38 pm
Weather Station: Instromet
Operating System: Raspberry pi
Location: Northamptonshire

Calibrating extra sensor and adding a display

Postby Jonathan Jefferies » Tue Nov 21, 2017 1:44 pm

Hi.
I run Cumulus mx with a raspberry pi.

Ive ticked the box to add an extra sensor which is measuring grass temperature. This is reading 2c lower than the normal displayed air temperature. How can i adjust the calibration offset to bring the grass temperature in line with the displayed air temperature.

Also i would like to display grass temperature on my website/cumulus page like the other parameters measured, how could i do this. At the moment i cant seem to record the lows of grass temperature without looking back every hour to find the lowest temperature as it is not recorded.

Hope all makes sense..

Many thanks

Jonathan Jefferies
Check out raundsweather.co.uk my weather website

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steve
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Re: Calibrating extra sensor and adding a display

Postby steve » Tue Nov 21, 2017 2:48 pm

Wouldn’t grass temp normally be lower than air temp anyway, or is that not the case?

There is no calibration setting for extra sensors in Cumulus, and it doesn’t record highs and lows for extra sensors. You could record the values in a database and extract highs and lows from that. There are web tags for extra sensors, which you could use in a web page processed by Cumulus - see the web site section of the wiki.
Steve
-----
Hosting available for Cumulus web sites. See http://sandaysoft.com/forum/viewtopic.php?f=2&t=11876

Please read the posts in the Announcements section about the current status of Cumulus development since I have retired from my day job

Jonathan Jefferies
Posts: 25
Joined: Fri Apr 22, 2016 5:38 pm
Weather Station: Instromet
Operating System: Raspberry pi
Location: Northamptonshire

Re: Calibrating extra sensor and adding a display

Postby Jonathan Jefferies » Tue Nov 21, 2017 4:09 pm

Steve

Thank you for the reply.

Im putting the grass temperature sensor in my Stevenson screen to calibrate it against the air temperature sensor so i know it reads the same, then i can put the sensor above the grass knowing its reading correctly.

Ok i will have a go at producing a database.

Thank you.
Check out raundsweather.co.uk my weather website

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steve
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Posts: 26318
Joined: Mon Jun 02, 2008 6:49 pm
Weather Station: None
Operating System: None
Location: On tour in Portugal
Contact:

Re: Calibrating extra sensor and adding a display

Postby steve » Tue Nov 21, 2017 5:03 pm

If you need any help with the database settings in MX, just ask and someone should be able to help. There may well be information in the wiki.
Steve
-----
Hosting available for Cumulus web sites. See http://sandaysoft.com/forum/viewtopic.php?f=2&t=11876

Please read the posts in the Announcements section about the current status of Cumulus development since I have retired from my day job


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