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Latest Cumulus release v1.9.4 (build 1099) - Nov 28 2014
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Cumulus 1.9.4 protocol

For discussion of DIY weather equipment - sensors, accessories, improvements to existing kit etc
malc-c
Posts: 211
Joined: Mon Jan 04, 2010 10:01 pm
Weather Station: Maplin N96GY / WH1081
Operating System: Windows 10 Pro 64bit
Location: Stevenage, UK
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Cumulus 1.9.4 protocol

Postby malc-c » Wed Dec 13, 2017 5:34 pm

I'm looking at developing my own weather station using the sensors that came with an old Maplin station and some digital one wire sensors for temperature etc. The idea is to have all the sensors hardwired into a box containing a PIC micro, with the data being written to an eprom, which would then be read and the data transmitted to a PC to be read by Cumulus 1.9.4.

Whilst the way the sensors work have been documented, what I cant seem to find is how Cumulus reads data from the base station such as the FO / Maplin units. Ideally I would like to use old fashioned serial communications between the PIC and PC to send the data, but would like to know if this is possible.

Any pointers would be welcome

Malc

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mcrossley
Posts: 5194
Joined: Thu Jan 07, 2010 9:44 pm
Weather Station: Davis VP2
Operating System: Stretch Lite rPi
Location: Wilmslow, Cheshire, UK
Contact:

Re: Cumulus 1.9.4 protocol

Postby mcrossley » Wed Dec 13, 2017 6:14 pm

Have a search of the forum, this has come up before - and been done before, see weather arduino etc.

The FO data is from the reading of memory locations over USB. You'd be better looking at the Davis serial protocol which is well documented by the manufacturer.

malc-c
Posts: 211
Joined: Mon Jan 04, 2010 10:01 pm
Weather Station: Maplin N96GY / WH1081
Operating System: Windows 10 Pro 64bit
Location: Stevenage, UK
Contact:

Re: Cumulus 1.9.4 protocol

Postby malc-c » Wed Dec 13, 2017 6:34 pm

Thanks Mark,

I tried a search, but the results were more to do with the protocol between the TX and RX units rather than to the PC..

Sounds like the Davies serial data would be a better bet.


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