I only need to report small packets (temperature) every hour, so I am thinking a lower frequency module will give me longer range.
I have come across the HopeRF modules that can be controlled with Arduinos and was wondering what experiences folks have had with these or alternatives?
A lot of the HopeRF modules seem unavailable so not sure if actively developed.
Also they seem more expensive compared to the esp8266.
How does ZigBee compare? I don't need encryption, just low power and ~25m outdoor range.