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LoRa is absurdly robust. Someone maxed out the ranging mechanism of the Semtech SX1280 with a 5dBi rubber antenna. He reached 60km with LoS. And there's a repo

LoRa is absurdly robust. Someone maxed out the ranging mechanism of the Semtech SX1280 with a 5dBi rubber antenna. He reached 60km with LoS. And there's a report of 90km in a ballooning project. (https://github.com/StuartsProjects/SX1280_Testing https://github.com/StuartsProjects/SX1280_Testing)

mpkendall 1y ago
Interesting, thanks for sharing! I'm interested in creating some form of live video/image system, thanks for this!
- Catbert59 1y ago
  The Semtech modems have several modulation modes which can be configured in great detail.. the datasheet is quite verbose about them. The latest generation of chips (AFAIR not yet released) integrated a mode that allows them to receive on all LoRa speed grades in parallel. Bit like the existing LoRaWAN basestation ICs. I remember reading a datasheet that one (already released chip) is also able to work on 144-146MHz. But that's not what standard Asia (ESP32+LoRa modules) offer. TTGO has AFAIR recently released a super new board that allows this band.
- sciurus 1y ago
  If you haven't seen it, you may be interested in https://www.areg.org.au/archives/210334 https://www.areg.org.au/archives/210334
jotux 1y ago
In a previous job I pushed an STM32WL5 on a custom frequency over a private satellite constellation with a relatively large yagi antenna. Over 70k km round trip :D
yonatan8070 1y ago
In fact, it's so robust that even when your antenna is a piece of wire hanging off a GPIO of a microcontroller with absolutely no dedicated radio hardware, you can still get several km of range. Truly crazy stuff. https://youtu.be/eIdHBDSQHyw https://youtu.be/eIdHBDSQHyw