<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">BTW. this is a test of an RC system using LoRa modulation (no LoRaWAN protocol), conducted in a mountainous region, with tx power of 10mW from a small handheld radio: 51.6km<br></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><a href="https://www.youtube.com/watch?v=fhlbhRqN_Eg">https://www.youtube.com/watch?v=fhlbhRqN_Eg</a></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">Jacek</div><div class="gmail_default" style="font-family:tahoma,sans-serif">kw4ep</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Oct 20, 2020 at 1:24 PM Jacek Radzikowski <<a href="mailto:jacek.radzikowski@gmail.com">jacek.radzikowski@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif">As far I know, the current terrestrial record for direct LoRaWAN communication is 766km: <a href="https://www.thethingsnetwork.org/article/lorawan-distance-world-record" target="_blank">https://www.thethingsnetwork.org/article/lorawan-distance-world-record</a></div><div class="gmail_default" style="font-family:tahoma,sans-serif">When satellites are involved, the distances get much bigger (LoRa modulation): 71,572km - <a href="https://hackaday.com/2018/02/22/at-71572-km-you-wont-beat-this-lora-record/" target="_blank">https://hackaday.com/2018/02/22/at-71572-km-you-wont-beat-this-lora-record/</a></div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif">Jacek</div><div class="gmail_default" style="font-family:tahoma,sans-serif">kw4ep</div><div class="gmail_default" style="font-family:tahoma,sans-serif"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Oct 20, 2020 at 1:08 PM Martin <<a href="mailto:dcmk1mr2@gmail.com" target="_blank">dcmk1mr2@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">I have used 70 cm LORA for tracking high altitude balloons. It works great up to the 20 miles - the farthest I tested.<br><br>I use the Adafruit Feather modules <a href="https://www.adafruit.com/product/3079" target="_blank">https://www.adafruit.com/product/3079</a> with the "radiohead" library.<div><br></div><div>73 Martin W6MRR </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Oct 20, 2020 at 9:49 AM Alex Fraser <<a href="mailto:beatnic@comcast.net" target="_blank">beatnic@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p><font size="+1" face="Comic Sans MS">Low power spread spectrum on
the 70cm band?</font></p>
<p><font size="+1" face="Comic Sans MS">Has anyone played with it?</font></p>
<p><font size="+1" face="Comic Sans MS"><a href="https://www.instructables.com/Introducing-LoRa-/" target="_blank">https://www.instructables.com/Introducing-LoRa-/</a></font></p>
<p><font size="+1" face="Comic Sans MS">70cm band SS data radio for
$20?</font><br>
</p>
</div>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr">Given a choice between two theories, take the one which is funnier </div>
</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature">Given a choice between two theories, take the one which is funnier </div>