I want my Arduino Uno to be able to send a single signal to another Arduino Uno at about 100-150ft apart. I don't really have a lot of experience with this, so what are some cheap options that will give me a reliable connection at that range?
I have looked at the XBee radios, but having to buy 2 radios. 2 shields, and other components needed to make it work ends up being pretty costly for wanting to do something so simple.
Cheap bluetooth options do not seem to handle the range I need.
I have been researching for a few hours now and can't seem to find any cheaper options, could anyone recommend any solutions under $70?