An inAir9 sx1276 module transmitting a beacon (the text "Hello World") using LoRa mode at 918 MHz, 125kHz bandwidth and spreading factor 9. Roughly equivalent to a 4800 baud modem in terms of throughput...
Driven via a BusPirate in binary SPI mode.
Next test, using the Carambola2 with OpenWRT and spidev. I have developed the SX1276 code that communicates using an SPI abstract class, with both BusPirate and Linux spidev implementations so that _should_ hopefully be quite straightforward...
Note also the signal strength in the above picture is exaggerated - when I introduced a short delay between transmissions the colour dropped right off, i.e. stopped saturating the link. Also, I turned down the gain...
Without even using proper antennas (I hooked up a 2.4G antenna) I was able to see signal on the RTL through 3 stone walls and 50m out to the road, so a good start.
UPDATE
I have the beacon code working on both OpenWRT using spidev, and with the bus pirate now. So on to the receiver...
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Excellent...! Good progress, guys!
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