RFToy is an Arduino-compatible gadget for interfacing with radio frequency (RF) modules. It can be used as a standalone gadget, or in conjunction with OpenSprinkler (including DC / AC / Pi) to decode and simulate RF signals on RF remote power sockets. This allows OpenSprinkler to switch not only sprinkler valves, but general devices such as lights, heaters, fans etc.
Version 3.0 has built-in WiFi (based on ESP8266). It comes with one fully assembled RFToy, screws and standoffs, a pair of 433Mhz transmitter-receiver and a pair of 315Mhz transmitter-receiver.
The classic version is based on ATmega328. It comes with one fully assembled RFToy, lithium rechargeable coin cell, a pair of 433MHz and a pair of 315MHz transmitter-receiver.