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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I've been experimenting with Semtec LoRa technology for a few months now and just commissioned an ‘experimental’ LoRa to APRS-IS gateway in Townsville on 432.900MHz to access use a bandwidth of 125kHz, Spreading Factor of 12 & Coding Rate of 4/5. The i-Gate callsign is VK4VAG-L1 and my test trackers are VK4VAG-T1, T2 etc<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So far I have tested a maximum path of ~10.2km line of sight pushing only 18dBm into a quarter wave wire antenna on 915MHz. Still testing 70cm!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The experimental LoRa i-Gate is transparent into APRS-IS and for testing I'm using the UI Lat/Long Position Report Format (without timestamp). I've also tested telemetry and weather message objects locally.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The trackers are built on an Arduino Pro Mini micro while the LoRa radio is an AI-thinker RA-02 module plus a uBlox-6M GPS module. Total cost less than $16AUD.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The i-Gate is running on a Raspberry Pi platform, coded in Java (thanks to Alex at IoT4Pi) and uses a LoRa Shield - total cost less than $100AUD.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I'm currently working on a LoRa digipeater of sorts.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The concept is based on work by Stuart Robinson, Alex Pawlin, Klaus Hirschelmann and Vienna's LoRa enthusiasts at ÖVSV (Österreichischer Versuchssenderver) which is the Austrian Experimental Broadcasting Association. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I'm just writing up some web-pages with photo's etc describing the i-Gate, tracker, software and hardware experiments along with a LoRa 101.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Happy New Year!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Andrew<o:p></o:p></p><p class=MsoNormal>VK4VAG<o:p></o:p></p></div></body></html>