yukart/orin-nano-env-setup
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

SIM7600: power the active GNSS antenna on every modem start

Browse Source 
An active antenna on the roof received nothing until the modem's
antenna supply was switched on (AT+CVAUXV=3050, AT+CVAUXS=1); then +5.5
dB over the passive one. The settings reset on every modem restart and
AT&W doesn't keep them, so interface 03 is reserved as /dev/sim7600-at
(ModemManager ignores it) and a udev-started oneshot re-applies them.
gpsd now re-attaches via gpsdctl after re-enumeration. Verified with a
live modem reset: antenna, LTE and the GNSS fix all recovered unattended.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
mikkeli
2026-10-09 17:03:20 +09:00
parent 3926dcc055
commit 68fd0715b8
2 changed files with 48 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/impl/reports/DEVICE-NAMING.md
+1
View File
@@ -20,6 +20,7 @@ can point at a different device after a reboot or replug.
| Onboard MTTCAN | platform device `c310000.mttcan` | `can_onboard` |
| PEAK PCAN-USB | USB `0c72:000c` | `can_pcan` |
| SIM7600 NMEA port | USB `1e0e:9001`, interface 01 | `/dev/sim7600-gps` (symlink) |
| SIM7600 spare AT port | USB `1e0e:9001`, interface 03 (ModemManager ignores it) | `/dev/sim7600-at` (symlink) |
| SIM7600 modem | ModemManager `simtech` plugin (USB IDs and per-interface port probing) | n/a, nothing configured by port name |
| SIM7600 data | NetworkManager `povo` connection with `ifname '*'` | n/a, follows whatever modem ModemManager exposes |