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#esp32#lora#rf

How far can I broadcast LoRa packets WITHOUT a radio? - LoLRa

CNLohr

74K subscribers • 5 videos on Hallway

YouTube
  • Recommended by 1 person: 1 on Hacker News.
  • Presented by Charles Lohr, hardware hacker
  • Linked in the descriptioncnlohr/lolra

Advanced. Deep dive for people who know the field.

223K views2 years ago1 recommendation

HardwareSystems programmingEmbedded systemsNetworking and protocolsElectronics

Charles Lohr demonstrates how to transmit valid LoRa packets using an ESP32 microcontroller without any dedicated radio hardware by leveraging RF aliasing.

Code/Writeup/Resources: github.com/cnlohr/lolra LoLRa Merch: cnlohr-shop.fourthwall.com/ Patreon: patreon.com/cnlohr Memes, in order of appearance: Tiny Paper Senior Chang, Trollface Rage Comic, Nerdy RF Mixer, 69-420, Sanic Gotta Go Fast, Midwit IQ Bell Curve, “Y U NO” Guy, Feels Good, This Is Fine, Great Gatsby Reaction If anyone wants to join my discord, feel free to ping me directly, we are open, but not public.

Why it's here

1 person recommends this

What people say. Recommended as a brilliant demonstration of pushing cheap microcontroller hardware to its absolute limits using clever software and RF tricks.

airbreatheron Hacker News • Recommends

On “Time Station Emulator”

check out this guy, doing something similar sending Lora packets without a radio - link to this video "This video explores LoRaWAN communication using a microcontroller without a dedicated radio chip. CNLohr demonstrates techniques to transmit LoRa packets over surprisingly long distances, pushing the limits of inexpensive hardware. The project involves creative software and hardware interaction to generate signals at unexpected frequencies."
View on Hacker News

donquichotteon Hacker News • Mentions

On “Rawdrawandroid – Build Android apps without any Java, in C and Make”

cnlohr is in his own league, this guy is bordering on genius. Dissatisfied with the state of the vendor SDK for CH32V003 microcontrollers (ultra-cheap RISC-V MCUs), he created his own 1, which is a pleasure to use. He also has a header-only RISC-V emulator that runs Linux (and Doom!) 2, and hacked an ESP32 to emit valid LORA frames with clever use of aliasing 3. 1 link 2 link 3 link to this video
View on Hacker News

yonatan8070on Hacker News • Mentions

On “Show HN: A high-altitude low-power flight computer for high-altitude balloons”

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. link to this video
View on Hacker News