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Recommended wire to use

For discussion of DIY weather equipment - sensors, accessories, improvements to existing kit etc
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stuee123
Posts: 1
Joined: Sun Nov 12, 2017 11:23 am
Weather Station: WMR300
Operating System: RaspberryPi

Recommended wire to use

Postby stuee123 » Sun Nov 12, 2017 11:32 am

Hi, im making a Rpi station including uv, luminance, soil temp
What im after information on is what would be the best cable to use for them as they would be no longer than 10m from the Rpi unit.

any info is greatly appreciated.

thanks.
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AllyCat
Posts: 1025
Joined: Sat Feb 26, 2011 1:58 pm
Weather Station: Fine Offset 1080/1 & 3080
Operating System: Windows XP SP3
Location: SE London

Re: Recommended wire to use

Postby AllyCat » Mon Nov 13, 2017 9:36 pm

Hi,

Welcome to the forum. Are your sensors Analogue or Digital (e.g. I2C data bus) ?

10 metres it getting rather long for I2C (but possible). If analogue, what are the typical signal amplitudes and source impedance? How many cores do you need in each cable run (signal, power lines, earth, etc.)?

The choice might be between CAT5 (4 x twisted pairs) network cable or some form of screened coaxial cable. In either case the first criterion might be that it should be an "outdoor" (e.g. UV-resistant) grade.

Cheers, Alan.
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