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SIM7600: note antenna placement for the first fix

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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mikkeli
2026-10-09 16:39:41 +09:00
parent 21007a384e
commit 3926dcc055
1 changed files with 2 additions and 2 deletions
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docs/impl/reports/SIM7600-SETUP.md
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@@ -145,8 +145,8 @@ brief NM connectivity-check penalty (`+20000`) after WiFi returns.
Check: `cgps` or `gpspipe -w -n 10`. On 2026-10-07, tested indoors, gpsd saw `nSat: 10, uSat: 0`, `mode: 1` (no fix). Check: `cgps` or `gpspipe -w -n 10`. On 2026-10-07, tested indoors, gpsd saw `nSat: 10, uSat: 0`, `mode: 1` (no fix).
Next: test with the GNSS antenna (IPEX, labeled GNSS on the HAT) with a clear view of the sky. A cold start can take a few minutes. Next: test with the GNSS antenna (IPEX, labeled GNSS on the HAT) with a clear view of the sky. A cold start can take a few minutes.
**2026-10-09, in the car:** first fix, `mode: 3` (3D) with 4 of 9 satellites used, GPS time valid. No setup changes were needed; **2026-10-09, in the car:** first fix, `mode: 3` (3D) with 4 of 9 satellites used, GPS time valid. Passive GNSS antenna on the dashboard, facing the sky. No setup changes were needed;
the indoor tests simply lacked sky view. the indoor tests simply lacked sky view. If fixes prove slow or drop out while driving, try an active antenna (check the HAT supplies antenna bias first).
## Rebuilding qmi_wwan after a kernel update ## Rebuilding qmi_wwan after a kernel update