Any links to purchase a compatible rp-sma antenna for 915mhz? Have you considered sourcing antenna for your bundle? I'd be happy to pay.
Hadn't checked your site in a bit (I've got a few Moteino's floating around the house) and was very excited to see the MightyHat. Headed off to Amazon/Adafruit to pick up an rpi2 and accessories. Felix - thanks in advance for all of the work that you do.
cicavey,
Thanks for the feedback,
For some reason the SMA connectors are not really easy to find and not cheap. RP are somewhat more common that I can see. Sourcing them from digikey or sparkfun is not worthwhile though.
Sparkfun has both in single quantities, right now I only have a few RP-SMA left to bundle with MightyHat.
https://www.sparkfun.com/products/592
https://www.sparkfun.com/products/593
They also seem to have some antennas but not sure about frequencies, browse around maybe they got sub ghz.
Digikey has a large selection of antennas. I have used these:
http://www.digikey.com/product-search/en?keywords=ANT-916-CW-RCS-ND
(http://media.digikey.com/photos/Linx%20Tech%20Photos/ANT-916-CW-RCS_sml.jpg)
http://www.digikey.com/product-search/en?keywords=1173-1023
(http://media.digikey.com/Photos/Anaren,%20Inc/66089-0406_sml.jpg)
http://www.digikey.com/product-search/en?keywords=ant-916-mhw-sma-s
(http://media.digikey.com/photos/Linx%20Tech%20Photos/MFG_ANT-xxx-MHW-yyy%20Series_sml.jpg)
Thanks!
Old topic but my ecosystem was built on the 433mhz transceivers so I was thinking of this antenna
https://www.digikey.com/products/en?keywords=ant-433-cw-hwr-rps-nd
(https://media.digikey.com/photos/Linx%20Tech%20Photos/ANT-433-CW-HWR-RPS.jpg)
The tech guy was talking 1/4 wave, 1/2 wave and full wave. I'm more software engineer rather than rf engineer so his suggestion that this 1/4 wave was fine for in home distances sounded OK to me.
Generally a 1/2 wave antenna should have more gain than a 1/4 wave (better TX and better RX). 1/4 wave on 433mhz should be more than sufficient for normal home distances. If something is blocking the signal from the Pi, you could get a foot or so SMA coax jumper and relocate the antenna some.
I wanted the 433mhz moteinos when I bought mine just because that's what I wanted. Lol. No scientific reason. Felix talked me into the 915mhz ones. My gateway Mote and RPi are in the basement along with a Weathershield and Sonarmote. I have another Weathershield out in my garage. I have no problem getting them to work on 915 MHz. So....if my 915s work fine with 1/4 wave or 1/2 wave antennas (I have done both for kicks and giggles), a 1/4 wave 433mhz antenna will be fine for uou