Image: reddit.com · I built an offline group-safety mesh for hikers: ESP32 + GPS + LoRa, with the firmware running inside a 3D simulator (bachelor's thesis, now open source)
HEARD: an offline LoRa safety mesh for hiking groups
An ESP32, GPS and LoRa mesh for tracking hiking groups offline, plus a Claude Code-built simulator that runs the real firmware on 3D terrain.
Credits
- Reddit poster Patient_Path_6809 Source ↗
- Repository account luciobaiocchi Source ↗
Earliest dated source:
The full story
HEARD is a mesh of ESP32 devices with GPS and LoRa that lets a hiking group leader see where everyone is and get an alert when someone leaves the planned route, fully offline. Nodes answer position requests and relay for members out of range. It began as a bachelor's thesis and is now open source.
The new part, made with Claude Code, is a simulator that compiles the firmware's protocol code unchanged into a Python module and runs it along real GPX tracks with a simulated radio channel and terrain line-of-sight. The maker says it caught real protocol bugs before they reached the trail.
How it was done
Tools
Themes
Loading themes…
Sources
From a short post by the maker, so the details are as they tell them.
- Reddit: I built an offline group-safety mesh for hikers: ESP32 + GPS + LoRa, with the firmware running insidReddit poster: Patient_Path_6809Posted
The maker's post on r/esp32.
If it disappears: archived copy of Reddit: I built an offline group-safety mesh for hikers: ESP32 + GPS + LoRa, with the firmware running insid (opens in a new tab)
- The code: github.comRepository account: luciobaiocchi
The project on GitHub.
- Reddit: I built an offline group-safety mesh for hikers: ESP32 + GPS + LoRa, with the firmware runReddit poster: Patient_Path_6809Posted
If it disappears: archived copy of Reddit: I built an offline group-safety mesh for hikers: ESP32 + GPS + LoRa, with the firmware run (opens in a new tab)