R&D Chemical Engineer, Professor, Teacher, Fisherman, and Conservationist

  • 26 Posts
  • 88 Comments
Joined 2 years ago
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Cake day: June 10th, 2023

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  • AlchemicalAgenttoMeshtasticChannels other than LongFast?
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    21 hours ago

    The largest limitation with a lot of nodes is channel congestion. Despite the name, LongFast is still pretty slow. The more nodes you have the longer channels stay active when a message is sent. Not to mention all the telemetry packets being sent about.

    My local area is nowhere near populated enough to cause an issue, but I’ve seen many recommendations that switching to ShortFast is the way to go when you have enough node density. It’s around 10x faster so it can handle more traffic. While range is smaller the higher number of nodes in your area would help offset the drawbacks.

    The issue then is you’re no longer on the default setting of all factory meshtastic devices so no one visiting your area would be able to see your mesh. The only way around this I know of is if you’re putting key locations on the mqtt meshmap where it shows your device’s default channel. Or a smaller mesh still running LongFast that periodically broadcasts something like “This area runs ShortFast, come join us!”


  • AlchemicalAgentOPtoMeshtasticTower or Mast Recommendation?
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    21 hours ago

    Honestly it’s just reluctance on my part. It’s a brand new roof and I was trying to avoid drilling in it. But if I can mount a tripod on the peak it’ll get me an extra 15’ of height on top of whatever pole I use.

    I’d love a proper tower. I’m also trying to get back into HAM after a 30-year break but I just don’t have the funds at through moment 😅





  • This is just a hypothetical, but have you compared the SNR of your local nodes throughout the day? It could be that your local noise floor gets lower at certain times and allows you pick up further signals.

    I’ve seen similar results where I get nodes from a town about 100 km away, but only around 8 PM. My local nodes SNR around that time is ~4 dBi higher than normal.




  • AlchemicalAgenttoMeshtasticMeshtastic on the news
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    9 days ago

    That’s true. The biggest thing I’d be worried about is feature creep. If you try to be everything you won’t effectively be anything. I’m glad to see meshtastic is making improvements to routing and DMs in the new version. Hopefully they just continue to refine and not bloat.









  • I think it’s still a valid question if you frame it along the lines of “something useful at protests, but also in everyday peaceful life”.

    Meshtastic LoRa is worth looking into if you’re going to protests with friends/family/cohorts. You can get a waterproof, GPS enabled, credit-card sized module with multi-day battery life and no flashing required for $35 (T1000-E). That’s specifically because it can also be used when hiking, going to festivals, or just for fun.

    I was just at a Mardi Gras parade and text messages couldn’t go through due to network congestion from too many people. With a couple of meshtastic devices our phones could still text each other and see our GPS positions on a map. All with encryption enabled.





  • No worries! If you’re starting out you can’t go wrong with a T1000-E. It’s water resistant, has GPS built-in, and ties everything together in a neat package for ~$35. There are plenty of other nodes out there but it’s more of a build your own kit situation. If you’re into microcontroller programming and stuff like arduino/RP/etc then Heltec v3 Lora boards are good tinker hardware.

    We also have a community here on mander for meshtastic.