From ce4eaa1aafcb5dd0626615a48be4854e6e4ce84e Mon Sep 17 00:00:00 2001 From: mikkeli Date: Thu, 8 Oct 2026 09:59:08 +0900 Subject: [PATCH] Note the LTE/GNSS hat is car-unit only The hat sits in a custom enclosure on the car Orin and isn't swapped to the development unit, so modem and gpsd testing happens on the car unit and gnss development elsewhere runs on its mock input. Co-Authored-By: Claude Opus 5.5 --- docs/REPOS.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/docs/REPOS.md b/docs/REPOS.md index 1eb2bdb..82087b4 100644 --- a/docs/REPOS.md +++ b/docs/REPOS.md @@ -156,6 +156,10 @@ Two Orin Nanos, and they have different jobs: | Development Orin (`mikkeli-orin-nano-2`) | Build, CI runner, bench testing. Always powered, on the LAN | | Car Orin (`mikkeli-orin-nano`) | Deployment target only | +The SIM7600 LTE/GNSS hat lives in the car unit only — its custom enclosure doesn't +move between units. Anything touching the modem or gpsd is tested on the car unit; +on the development unit, `gnss` runs against its own mock input (decision 19). + ⚠ **The guarantee is version parity, not architecture.** An aarch64 binary built on a newer userland still fails to load on an older one. A JetPack or Ubuntu upgrade applied to one unit and not the other reintroduces the problem, silently