Time: chrony replaces timesyncd, with NICT/JP-pool NTP primary and gpsd
SHM as an offline-only refclock; makestep any time and fake-hwclock
cover the battery-less RTC.
Antenna: the modem cleared the supply again after the service set it,
so the service is now idempotent, configurable (ANTENNA=active|passive,
passive keeps it off) and re-checked by a 30 s timer.
gpsd: a gpsdctl udev hook spawned a stray gpsd without -n at boot that
blocked the real service; gpsd.service now binds to the NMEA device.
GNSS: CGNSSMODE=15 (GLONASS, BeiDou, Galileo, QZSS) and all supported
NMEA sentences; both persist across a modem reset. Adds sim7600-at.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
timesyncd now uses ntp.nict.jp (stratum 1), with the JP pool and Ubuntu
as fallback, over whichever uplink holds the default route. Timezone
moves from Asia/Yakutsk to Asia/Tokyo: same offset, right place.
Records that the RTC loses time at power-off (the cold boot came up at
June 4 until NTP synced), and the planned chrony + gpsd setup once
GNSS has a fix.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
mikkeli