Is the talk archived online somehow? I haven't been able to find a link. Thanks,
--Eric On Sat, Jul 5, 2025 at 5:00 AM <[email protected]> wrote: > Send PLUG mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://pdxlinux.org/mailman/listinfo/plug > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of PLUG digest..." > > > Today's Topics: > > 1. Re: Follow up: Portland Linux/Unix Group General Meeting: > Caleb Phillips with an Introduction to Meshtastic (Patrick O'Connor) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 04 Jul 2025 09:46:58 -0700 > From: Patrick O'Connor <[email protected]> > To: "Portland Linux/Unix Group" <[email protected]> > Subject: Re: [PLUG] Follow up: Portland Linux/Unix Group General > Meeting: Caleb Phillips with an Introduction to Meshtastic > Message-ID: <[email protected]> > Content-Type: text/plain; charset="UTF-8" > > The redditor is correct. > > Lora max is 256 bytes per packet. > LoraWAN max is 222 bytes per packet. > > https://www.sciencedirect.com/topics/computer-science/maximum-packet-size > > 4.2.1.6 Packet structure and time on air > > Fig. 4?4 shows the packet structure used by LoRa. LoRa offers a maximum > packet size of 256 bytes. More details on the LoRa packet structure can be > found in [5]. For the purpose of this chapter, the main part of interest is > the preamble that is a sequence of constant upchirps, two downchirps, and a > quarter of upchirp. > > https://arxiv.org/pdf/1607.08011 > > I am sad I missed this talk. I was dog tired last night. > > Patrick > > > > ---- On Fri, 04 Jul 2025 00:00:25 -0700 Russell Senior < > [email protected]> wrote --- > > There were some questions at the talk that didn't get precise answers. > > > > From wikipedia (https://en.wikipedia.org/wiki/LoRa): > > > > "The LoRaWAN data rate ranges from 0.3 kbit/s to 50 kbit/s per > channel." > > > > I haven't found anything yet that talks authoritatively about packet > > size limits. A Reddit user suggested the maximum packet (payload?) size > > was 255 bytes, but it's Reddit, so apply appropriate error bars. > > > > -- > > Russell > > > > On 7/3/25 05:00, Russell Senior wrote: > > > Tonight! > > > > > > On 6/25/25 00:25, Russell Senior wrote: > > >> Who: Caleb Phillips > > >> What: An Introduction to Meshtastic > > >> Where: 1930 SW 4th Avenue, Portland, Oregon 97201-5304, Room 86-01 > > >> When: Thursday, July 3, 2025 at 7 PM > > >> Why: The pursuit of technology freedom > > >> > > >> Summary: > > >> > > >> Meshtastic is an open source mesh network application for low power > > >> IoT devices. Rapidly reaching critical mass in Portland due to a > fast > > >> growing user community and low cost and accessible platform, it > > >> provides an appealing playground for off grid and secure > > >> communications experimentation and infrastructure design. This talk > > >> will cover basics of the wireless tech, platform and hardware as > well > > >> as demo introductory usage with built nodes. > > >> > > >> Bio: > > >> > > >> Caleb Phillips is featherless biped who is passionate about public > > >> domain software and science. His day job is at a government > > >> laboratory working on renewable energy technology and he comes from > a > > >> background in academic wireless systems research, data science, > > >> statistical modeling and visualization. Locally he has done work > with > > >> the Personal Telco Project and other organizations. His website is > > >> http://smallwhitecube.com. > > >> > > >> > > >> PLUG is back at Portland State University. Thanks to the Computer > > >> Science Department and to Andrew Greenberg for hosting us! The room > > >> is in the basement of the PSU Engineering Building (also connected > > >> underground to the Fourth Avenue Building, or FAB). Enter through > the > > >> Engineering Building. The outside door will be locked, but there > > >> should be someone present at the entrance to let you in starting at > > >> 6:40pm until 7pm. There will be a sign on the door with a phone > > >> number you can SMS if there isn't someone there to let you in > > >> immediately. > > >> > > >> https://calagator.org/events/1250482087 > > >> > > >> With luck, the talk will also be streamed live here: > > >> http://www.twitch.tv/kngbwlf, and later posted to YouTube. > > >> > > > > > > > > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > PLUG: https://pdxlinux.org > PLUG mailing list > [email protected] > https://pdxlinux.org/mailman/listinfo/plug > > > ------------------------------ > > End of PLUG Digest, Vol 250, Issue 4 > ************************************ >
