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You are here: Home / Radio Show / #667 – Long Distance with CNLohr-a

#667 – Long Distance with CNLohr-a

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Welcome back, CNLohr!

  • CNLohr was on the last episode talking about the CH32V003 part and the CH32V003fun library
  • Charlieplexed errings
  • Fast iteration
  • Lohr-a…LoRa…get it?
  • LoRa

  • Started in January 2024 with discussions with mustardtiger / Frank
  • Charles had done Wifi long range before
  • Also FM from ATTINY85
  • Ethernet + AM
  • Radio signals without radios
  • USB
  • Harmonics
  • LolRa
  • Upchirps / downchirps
  • 903.825 – 903.975 mhz
  • Michael Ossmann talk
  • LoRa doesn’t do code matching
  • JP Norair talking about LoRaWAN / DASH7
  • Tool / emulator for the airwaves
  • 3 lines of the repo
  • Tool to create tables
  • There are two 2 lookup tables (up and downchirps)
  • Table is different for differnet spreading factors and base frequencies
  • Andreas Spiess LoRa/LoRaWAN distance attempts
  • Spreading Factor — can’t past SF10 on this setup for unknown reason
  • AirSpy
  • Matt Knight
  • LoRaWAN — protocol vs network
  • The Things Network / Helium
  • Activation by personalization
  • Nesting dolls of encryption
  • New parts CH32V002 (also, -005, -006. -007)
  • Charles is excited about the op amp on the CH32V006 that has 64 MHz GBW
  • CH32V203 – 144 MHz – $0.24, has usb xcvr
  • CH32X035 is self clocking – best low cost option for USB
  • All are supported in library now
  • Community – CNLohr discord
  • Porting examples for the parts using the technical reference manual
  • MNIST database – handwriting recognition system
  • Announcement post on CNX about the new parts
  • It’s possible to hook up parts directly through the 1 pin SWIO, so you can hot-load firmware
  • Writing code onto a “scratch pad”
  • Want to see more CNLohr experiements online?
    • Youtube.com/cnlohr
    • discord: cnlohr reach out for invite
    • Github

Comments

  1. Scott says

    May 30, 2024 at 11:21 am

    This guy’s work is just stunning. I’ve started using CH32V003 after I heard him on here the first time. Really great to listen to, great contribution to the community with CH32V003fun. Can’t wait for the next time.

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