I have used the Semtech SX127x chip that has the proprietary LoRa chirp spread spectrum modulation (in addition to a few other common modulations, such as FSK). There are plenty of affordable eval boards, such as this: https://www.tindie.com/products/DORJI_COM/868mhz-915mhz-sx1276-data-radio-modem-drf1276dm/ (Search for other LoRa products, there are eval boards in Arduino, Raspberry Pi and Xbee form factors)
The chip has a 256 byte buffer which accommodates 802.15.4, but has no 802.15.4-specific features such as PAN filtering to reduce CPU load. The chip also has poor timing control of the radio… it’s hard to start a transmission with microsecond control like you can with some TI radios. So it isn’t exactly suitable for a protocol with tight timing control. !!Dean > On Mar 25, 2017, at 12:39 PM, John Griessen <[email protected]> wrote: > > 802.15.4 radios running at 2.4GHz seem to work for only short distances in > wild locations with trees in the way, so I'd like to make an inexpensive > platform for 900MHz/868MHz bands. The mulle platform docs say it is > incomplete here: https://github.com/RIOT-OS/RIOT/wiki/Board%3A-Mulle > > Are any of the other 2.4GHz ARM platforms easy to change to a 900MHz radio > such as AT86RF212b? > What other 900MHz radios should I consider? The ST spirit radio has a > contiki driver, but no riot-os. > Is anyone using the NXP/Freescale MKW01 MCU-radio chip? > _______________________________________________ > users mailing list > [email protected] > https://lists.riot-os.org/mailman/listinfo/users _______________________________________________ users mailing list [email protected] https://lists.riot-os.org/mailman/listinfo/users
