ESP32 mesh
ResQme
ESP32 devices that relay SOS messages without Wi-Fi or cell service.
second overall at HackHarvard 2025
The nodes build a local mesh and pass messages between devices until one reaches a connected endpoint.
My team built the firmware, hardware, enclosure, and backend during the hackathon instead of treating the embedded device as a mockup.
How it fits together
- 01ESP32 node
- 02peer discovery
- 03message relay
- 04delivery acknowledgement
- 05connected gateway
What I learned
- Mesh demos fail quickly when node identity and retries are vague.
- A simple physical interface mattered more than adding more screens.