Firmware update and recovery paths for field devices
Using a browser flasher, UF2 fallback, and direct bootloader entry to support firmware recovery.
Firmware / Embedded · PRJ-2424
RatTunnel Field Transport
RatTunnel includes firmware update and recovery options, identity controls, system diagnostics, and radio configuration for remote deployments.
SYSTEM PLATE / PRJ-2424STATUS / Firmware v1.0.33
200stored routes
03update paths
08swatchdog
Problem
Problem and constraints
The firmware must handle unreliable links, duplicate traffic, abrupt power loss, and operator errors while remaining serviceable without a specialized development setup.
Engineering approachArchitecture and implementation
The node uses a bounded route table, duplicate suppression, watchdog recovery, persistent runtime settings, and three update paths. A browser flasher provides access to configuration and radio settings.
Transport
Reticulum-compatible announcements, learned routes, forwarding, and jittered relay queues.
Security
X25519 and Ed25519 peer messaging plus an optional ephemeral-identity boot mode.
Recovery
Web flasher, UF2 fallback, watchdog, diagnostics, and explicit bootloader entry.
Supporting notes
Related technical notes
Related writeups document implementation patterns, tradeoffs, and recovery considerations from this work.
Repository
Source code and documentation
Public repository metadata and source are included where the project is available for review.
Related work
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