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Show HN: OS3-RNode, an RNode-Compatible LoRa Modem on CH32V003
I built OS3-RNode as a tiny RNode-compatible LoRa modem firmware for CH32V003 + E22-900M22S.<p>It is based on a small deterministic event-driven core, with no scheduler, no threads, and bounded interrupt work. The goal was to make a minimal and auditable transport for Reticulum/NomadNet on very constrained hardware.<p>The article has the architecture notes and a firmware link. Feedback on the event model, failure handling, and interoperability tradeoffs would be useful.
OS3-RNode is a technically impressive low-level engineering project targeting ultra-cheap RISC-V hardware, but it currently functions as an open-source tool rather than a commercial startup. While the technical execution is high, the lack of a business model, market scale, and significant traction makes it a high-risk, niche hobbyist play at this stage.