He encontrado este en ebay a 1,77€ puesto en casa.
Brand new and high quality.
Maximum operating speeds up to 2Mbps, GFSK modulation efficiency, Anti-interference ability, Particularly suitable for industrial control applications.
125 Channels, Multi-point communication and frequency hopping to meet the communication needs.
Built-in hardware CRC error detection, Multipoint communication address control.
Low-power 1.9 ~ 3.6V, only 1uA on Power down mode.
Built-in 2.4Ghz antenna.
Available software to set the address, only received local Address when output data(Provide interrupt instruction), can be directly connected to a variety of microcontrollers, Software programming is very convenient.
Built-in voltage regulator.
Standard DIP Pitch Interface for embedded applications.
Size:3.3cm x 1.4cm - 1.29inch x 0.56inch.
Si son esos, investigare como se usan y configuran, pediré tres o cuatro y haré algunas pruebas.
Tambien he visto unos arduino nano a 11.82 € en casa