henryhunt
Posts: 17
Joined: Sat Aug 27, 2016 11:31 am

Looking for waterproof wi-fi antenna on short cable for RPi

Sun Jan 08, 2017 5:36 pm

I'm building a weather station using a raspberry pi (the very first version), which collects data from an arduino and uploads it to a database on my website. Currently, a long network cable runs from the pi to the nearest ethernet socket inside the house and I'd now like to replace this with a wireless/wi-fi antenna. Everything (both the pi and arduino) is outside, in a weatherproof box approximately 4.5 metres from the house. Despite the weaker connection outside, I've tested it with my phone and can load websites, including my one containing the data, so it is strong enough to send the tiny pieces of data that I have.

I'm looking for a cheap/reasonably cheap antenna to allow me to connect to the wi-fi network and upload data. It MUST be water/weatherproof because it will be mounted a few metres up the pole of my station. Therefore, it also needs to have a couple of metres of cable and connect via USB (assuming this is the port used for devices like this) to my pi in as simple a way as possible. It doesn't have to be big and bulky or anything, just waterproof.

I'd love it if anyone knows of an antenna that would work for me.

Thanks!

martinhj
Posts: 23
Joined: Mon Jan 09, 2012 1:05 pm

Re: Looking for waterproof wi-fi antenna on short cable for

Mon Jan 09, 2017 12:40 pm

Take a look on ebay...there's loads of this stuff about dirt cheap. I have one of these I am going to mount on my chicken house....

http://www.ebay.co.uk/itm/SMA-2-4GHz-9D ... 2006955656

Doesnt necessarily say waterprof but it should be and is cheap enough to risk it not being...some silicon spread around the connection to the base should be sufficient if in doubt.

At the moment I actually reversed the solution by utilising an old wifi router with a detachable antenna and put one of these on it on the house end

http://www.ebay.co.uk/itm/2-4GHz-14dBi- ... SwJ7RYT6UW

which has been running in all weathers for a few years....ou could of course use one of these but you may get too much signal(?). My garden is rather long. Im going to add the whip at the other end to get the signal up to full strength

Martin

alphanumeric
Posts: 2308
Joined: Tue Jan 19, 2016 2:17 pm
Location: Sydney, Nova Scotia, Canada

Re: Looking for waterproof wi-fi antenna on short cable for

Mon Jan 09, 2017 1:48 pm

You didn't mention what Pi your using, that info might help. You mention needing a weatherproof "Antenna", your also going to need a WIFI module to go with it. Either USB or maybe GPIO. As an example there are boards like this, https://www.adafruit.com/products/3283 with a connector for adding an external antenna. You will likely need a pigtail adapter cable too though. https://www.adafruit.com/products/851 If you hunt around you may find a USB WIFI adapter with a detachable antenna. You could then swap the one that comes with it for one like what was posted above.

chuckc192000
Posts: 18
Joined: Mon Nov 21, 2016 2:59 am

Re: Looking for waterproof wi-fi antenna on short cable for

Mon Jan 09, 2017 5:17 pm

I've used this one outdoors. It connects via Ethernet but it works fine with the RPi.

https://www.amazon.com/gp/product/B00KV ... UTF8&psc=1

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