URL below discusses test program results discussed on google groups area for the low cost ($4 for the Dorji version) radio transceiver PCBs, 100mW TX, 433MHz or 900MHz bands, or ham bands where there are no duty cycle restrictions. (Having a license I used 466MHz and also avoiding interfering with nearby wireless thermometers).
https://groups.google.com/forum/#!topic/rf22-arduino/3leoWT5SCv8
Using Teensy 3 and a mix of HopeRF RFM22 and Dorji Si4432 thumbnail-sized PCBs. Piggybacked on/powered by Teensy3. Interrupt driven I/O via SPI. Radios do all the hard work: formatting frames, detecting incoming bits, FIFOing bytes to give to the MCU, doing CRC8 generation/checking. Radios can run slow/fast, narrowband/wideband. I used GFSK 56KBps to keep average power consumption low. Range with these, with just 8 in. of wire for an antenna (you could use a yagi) is hundreds of feet in cluttered areas, due to the 100mW TX and GFSK.
This is the excellent RF22 library: http://www.airspayce.com/mikem/arduino/RF22/
and a couple of very small changes for the Teensy 3; by me and others. Combined with a rather large test program and a sniffer capability to log all messages (promiscuous mode).
https://groups.google.com/forum/#!topic/rf22-arduino/3leoWT5SCv8
Using Teensy 3 and a mix of HopeRF RFM22 and Dorji Si4432 thumbnail-sized PCBs. Piggybacked on/powered by Teensy3. Interrupt driven I/O via SPI. Radios do all the hard work: formatting frames, detecting incoming bits, FIFOing bytes to give to the MCU, doing CRC8 generation/checking. Radios can run slow/fast, narrowband/wideband. I used GFSK 56KBps to keep average power consumption low. Range with these, with just 8 in. of wire for an antenna (you could use a yagi) is hundreds of feet in cluttered areas, due to the 100mW TX and GFSK.
This is the excellent RF22 library: http://www.airspayce.com/mikem/arduino/RF22/
and a couple of very small changes for the Teensy 3; by me and others. Combined with a rather large test program and a sniffer capability to log all messages (promiscuous mode).
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