# Long Distance with CNLohr-a

- Show: [The Amp Hour](https://hardwarepodcasts.com/podcast/the-amp-hour)
- Published: 2024-05-23
- Length: 1h 31m
- Episode: 667
- Page: https://hardwarepodcasts.com/podcast/the-amp-hour/2024-05-23-long-distance-with-cnlohr-a
- Listen: https://theamphour.com/667-long-distance-with-cnlohr-a/

## Summary

Chris Gammell, a hardware developer and YouTuber, explains how he implemented LoRa communication using only the GPIO pins of microcontrollers like the CH32V003 and ESP32-S2, leveraging harmonics and bit-stream synthesis. He details the technical challenges of generating 900 MHz signals from low-speed pins, the role of spreading factors, and the surprising range achieved (over 2.5 km). Gammell also discusses the CH32V003 Fun library, the upcoming CH32V006 chip, and the architecture of LoRaWAN networks.

## Chapters

- [0:00](https://hardwarepodcasts.com/podcast/the-amp-hour/2024-05-23-long-distance-with-cnlohr-a#t=0) Introduction and CH32V003 Fun Library
- [4:24](https://hardwarepodcasts.com/podcast/the-amp-hour/2024-05-23-long-distance-with-cnlohr-a#t=264) Motivation for LoRa and Harmonic Theory
- [18:22](https://hardwarepodcasts.com/podcast/the-amp-hour/2024-05-23-long-distance-with-cnlohr-a#t=1102) LoRa Protocol Mechanics: Chirps and Spreading Factors
- [26:05](https://hardwarepodcasts.com/podcast/the-amp-hour/2024-05-23-long-distance-with-cnlohr-a#t=1565) GPIO Bit-Stream Synthesis and Lookup Tables
- [40:44](https://hardwarepodcasts.com/podcast/the-amp-hour/2024-05-23-long-distance-with-cnlohr-a#t=2444) Range Testing and LoRaWAN Integration
- [1:09:52](https://hardwarepodcasts.com/podcast/the-amp-hour/2024-05-23-long-distance-with-cnlohr-a#t=4192) CH32V003 Fun Community and Future Chips

## Topics

- [Wireless & RF](https://hardwarepodcasts.com/topic/wireless-and-rf)
- [Microcontrollers & dev platforms](https://hardwarepodcasts.com/topic/microcontrollers-and-platforms)
- [Embedded firmware](https://hardwarepodcasts.com/topic/embedded-firmware)
- [Connected products & IoT](https://hardwarepodcasts.com/topic/connected-products-and-iot)

## Most relevant to

makers and hobbyists

## Mentioned

- CH32V003 (chip)
- CH32V003 Fun (tool)
- ESP32-S2 (chip)
- LoRa (product)
- LoRaWAN (product)
- SX1276 (chip)
- CH32V006 (chip)
- CH32V005 (chip)
- Things Network (company)
- Helium Network (company)

## Related episodes from other shows

- [272: Stick 'Em on Whales](https://hardwarepodcasts.com/podcast/embedded-fm/2018-12-28-272-stick-em-on-whales) (Embedded.fm)
- [MQTT Anywhere, LoRaWAN Sheep Tracking, More DOOM on everything!](https://hardwarepodcasts.com/podcast/the-electromaker-show/2023-09-25-mqtt-anywhere-lorawan-sheep-tracking-more-doom-on-everything) (The Electromaker Show)
- [Maker Wizardry, LoRaWAN Decade Long Battery Life Sensors, The Cutest Hacking Tool Ever, and More!](https://hardwarepodcasts.com/podcast/the-electromaker-show/2025-01-23-maker-wizardry-lorawan-decade-long-battery-life-sensors-the-cutest-hacking-tool) (The Electromaker Show)
- [102: The Deadly Fluffy Bunny (With WiFi)](https://hardwarepodcasts.com/podcast/embedded-fm/2015-05-27-102-the-deadly-fluffy-bunny-with-wifi) (Embedded.fm)
- [Ep. 5 | LoRaWAN: The Things Network and LoRa Alliance Talk Open IoT](https://hardwarepodcasts.com/podcast/moores-lobby/2020-07-10-ep-5-lorawan-the-things-network-and-lora-alliance-talk-open-iot) (Moore's Lobby)

## Citing this page

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