How to choose an RF frequency

[Mr. Bubbles]

Hello,

I am fairly new to Arduino and moteino and have a basic understanding of electronics and circuits. I have a few projects in mind that I would like to make use of several moteino devices. However, I'm not entirely sure how to choose which RF transceiver for each project. I understand that different frequencies will be better in various scenarios and such parameters as obstructions and distance would have to be considered. Also, I assume the higher power transceivers would be less ideal for a battery-powered device that only requires are short distance of communication?

Could anyone recommend a tutorial / website / thread that helps address these questions?

Thank you!

[Felix]

Without an extensive explanation, if you only need communication around your house/property you can go with a RFM69W-915mhz. It is plenty, and antenna is shorter.
A lot of people prefer 433 because it's universally allowed. But the 915mhz modules work at 868 or 915 with seemingly the same performance, so I would deem them universal as well.
Here's a link someone shared in another post, which shows a project using HW-915 modules that reach way beyond a house, so W would be less but still plenty:
http://electronichamsters.wordpress.com/2014/06/09/home-automation-with-arduino-and-openhab/