Hi,
Iḿ having troubles with a weewx inatance running on ubuntu 20. After an 
unforseen power outage, the system came back up, but weewx stopped 
processing data. The system is connected to an ulitmeter 2100 via ttyS0. 
With screen I do see data on that port. However weewx starts, and does 
nothing. No errors in the log, no activity at actually after starting 
weewx. If I manually stop weewx, it results in an error in the log, before 
stopping. I reinstalled weewx, emptied the database but no effect. I just 
doesn´t process data. Debug level=1. Maybe someone can help me out?

Log entries:

May 28 14:00:18 kwsweerstation systemd[1]: Starting LSB: weewx weather 
system...
May 28 14:00:18 kwsweerstation weewx[11973]:  * Starting weewx weather 
system weewx
May 28 14:00:18 kwsweerstation weewx[11991] INFO __main__: Initializing 
weewx version 4.5.1
May 28 14:00:18 kwsweerstation weewx[11991] INFO __main__: Using Python 
3.8.5 (default, Jan 27 2021, 15:41:15) #012[GCC 9.3.0]
May 28 14:00:19 kwsweerstation weewx[11991] INFO __main__: Platform 
Linux-5.4.0-73-generic-x86_64-with-glibc2.29
May 28 14:00:19 kwsweerstation weewx[11991] INFO __main__: Locale is 
'nl_NL.UTF-8'
May 28 14:00:19 kwsweerstation weewx[11991] INFO __main__: PID file is 
/var/run/weewx.pid
May 28 14:00:19 kwsweerstation weewx[11994] INFO __main__: Using 
configuration file /etc/weewx/weewx.conf
May 28 14:00:19 kwsweerstation weewx[11994] INFO __main__: Debug is 1
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG __main__: Initializing 
engine
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.engine: Loading 
station type Ultimeter (weewx.drivers.ultimeter)
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.drivers.ultimeter: 
Driver version is 0.41
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.drivers.ultimeter: 
Using serial port /dev/ttyS0
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.drivers.ultimeter: 
Open serial port /dev/ttyS0
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.engine.StdTimeSynch
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.engine.StdTimeSynch
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.engine.StdConvert
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.engine: StdConvert 
target unit is 0x1
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.engine.StdConvert
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.engine.StdCalibrate
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.engine.StdCalibrate
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.engine.StdQC
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.engine.StdQC
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.wxservices.StdWXCalculate
May 28 14:00:19 kwsweerstation weewx[11973]:    ...done.
May 28 14:00:19 kwsweerstation systemd[1]: Started LSB: weewx weather 
system.
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.manager: Daily 
summary version is 4.0
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.wxservices.StdWXCalculate
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service user.cmon.ComputerMonitor
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: service version 
is 0.20
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.manager: Daily 
summary version is 4.0
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: sysinfo: Linux 
kwsweerstation 5.4.0-73-generic #82-Ubuntu SMP Wed Apr 14 17:39:42 UTC 2021 
x86_64
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
processor: 3
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
vendor_id: GenuineIntel
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: cpu 
family: 6
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: model: 
28
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: model 
name: Intel(R) Atom(TM) CPU  330   @ 1.60GHz
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
stepping: 2
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
microcode: 0x219
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: cpu 
MHz: 1597.071
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: cache 
size: 512 KB
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
physical id: 0
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
siblings: 4
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: core 
id: 1
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: cpu 
cores: 2
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
apicid: 3
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
initial apicid: 3
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: fpu: 
yes
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
fpu_exception: yes
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: cpuid 
level: 10
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: wp: yes
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: flags: 
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush 
dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc 
arch_perfmon pebs bts nopl cpuid aperfmperf pni dtes64 monitor ds_cpl tm2 
ssse3 cx16 xtpr pdcm movbe lahf_lm dtherm
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: bugs: 
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
bogomips: 3194.12
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
clflush size: 64
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
cache_alignment: 64
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: 
address sizes: 32 bits physical, 48 bits virtual
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.cmon: cpuinfo: power 
management: 
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service user.cmon.ComputerMonitor
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service user.crt.CumulusRealTime
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.crt: service version 
is 0.21
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.crt: realtime txt 
output goes to /var/www/weerstation/realtime/realtime.txt
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.crt: 'None' values 
will be displayed as N/A
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.crt: units will be 
displayed as METRICWX
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.crt: wind units will 
be displayed as knot
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.crt: zambretti 
forecast: False
May 28 14:00:19 kwsweerstation weewx[11994] INFO user.crt: binding is loop
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service user.crt.CumulusRealTime
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.wxxtypes.StdWXXTypes
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.wxxtypes.StdWXXTypes
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.wxxtypes.StdPressureCooker
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.wxxtypes.StdPressureCooker
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.wxxtypes.StdRainRater
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.wxxtypes.StdRainRater
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.wxxtypes.StdDelta
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.wxxtypes.StdDelta
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.engine.StdArchive
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.engine: Archive will 
use data binding wx_binding
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.engine: Record 
generation will be attempted in 'hardware'
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.engine: Using 
archive interval of 300 seconds (specified in weewx configuration)
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Use LOOP 
data in hi/low calculations: 1
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.engine.StdArchive
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.restx.StdStationRegistry
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.restx: 
StationRegistry: Station will be registered.
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.restx.StdStationRegistry
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.restx.StdWunderground
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.restx: Wunderground: 
Posting not enabled.
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.restx.StdWunderground
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.restx.StdPWSweather
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.restx: PWSweather: 
Posting not enabled.
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.restx.StdPWSweather
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.restx.StdCWOP
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.restx: CWOP: Data 
for station FW4650 will be posted
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.restx.StdCWOP
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.restx.StdWOW
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.restx: WOW: Data for 
station b24a4cf1-0de4-e611-9401-0003ff5987fb will be posted
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.restx.StdWOW
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.restx.StdAWEKAS
May 28 14:00:19 kwsweerstation weewx[11994] INFO weewx.restx: AWEKAS: 
Posting not enabled.
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.restx.StdAWEKAS
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service user.twitter.Twitter
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.manager: Daily 
summary version is 4.0
May 28 14:00:19 kwsweerstation weewx[11994] DEBUG weewx.manager: Daily 
summary version is 4.0
May 28 14:00:20 kwsweerstation weewx[11994] INFO user.twitter: service 
version is 0.15
May 28 14:00:20 kwsweerstation weewx[11994] INFO weewx.restx: Twitter: No 
config info. Skipped.
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service user.twitter.Twitter
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service user.windfinder.WindFinder
May 28 14:00:20 kwsweerstation weewx[11994] INFO user.windfinder: service 
version is 0.12
May 28 14:00:20 kwsweerstation weewx[11994] INFO user.windfinder: Data will 
be uploaded for snitser_mar
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service user.windfinder.WindFinder
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.engine.StdPrint
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.engine.StdPrint
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Loading 
service weewx.engine.StdReport
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Finished 
loading service weewx.engine.StdReport
May 28 14:00:20 kwsweerstation weewx[11994] INFO __main__: Starting up 
weewx version 4.5.1
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.engine: Station 
does not support reading the time
May 28 14:00:20 kwsweerstation weewx[11994] INFO weewx.engine: Using 
binding 'wx_binding' to database 'weewx.sdb'
May 28 14:00:20 kwsweerstation weewx[11994] INFO weewx.manager: Starting 
backfill of daily summaries
May 28 14:00:20 kwsweerstation weewx[11994] INFO weewx.manager: Daily 
summaries up to date
May 28 14:00:20 kwsweerstation weewx[11994] INFO weewx.engine: Starting 
main packet loop.
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.drivers.ultimeter: 
Set station to logger mode
May 28 14:00:20 kwsweerstation weewx[11994] DEBUG weewx.manager: Daily 
summary version is 4.0
May 28 14:00:23 kwsweerstation systemd[1]: Stopping LSB: weewx weather 
system...
May 28 14:00:23 kwsweerstation weewx[12001]:  * Stopping weewx weather 
system weewx
May 28 14:00:23 kwsweerstation weewx[11994] INFO __main__: Received signal 
TERM (15).
May 28 14:00:23 kwsweerstation weewx[11994] INFO weewx.engine: Main loop 
exiting. Shutting engine down.
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG weewx.restx: Shut down 
WindFinder thread.
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG weewx.restx: Shut down 
WOW thread.
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG weewx.restx: Shut down 
CWOP thread.
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG weewx.restx: Shut down 
StationRegistry thread.
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG weewx.drivers.ultimeter: 
Close serial port /dev/ttyS0
May 28 14:00:23 kwsweerstation weewx[11994] INFO __main__: Terminating 
weewx version 4.5.1
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****  
Traceback (most recent call last):
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****    
File "/usr/share/weewx/weewxd", line 157, in main
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****      
engine.run()
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****    
File "/usr/share/weewx/weewx/engine.py", line 208, in run
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****      
for packet in self.console.genLoopPackets():
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****    
File "/usr/share/weewx/weewx/drivers/ultimeter.py", line 130, in 
genLoopPackets
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****      
readings = self.station.get_readings_with_retry(self.max_tries,
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****    
File "/usr/share/weewx/weewx/drivers/ultimeter.py", line 259, in 
get_readings_with_retry
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****      
buf = self.get_readings()
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****    
File "/usr/share/weewx/weewx/drivers/ultimeter.py", line 229, in 
get_readings
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****      c 
= self.serial_port.read(1)
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****    
File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 483, in 
read
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****      
ready, _, _ = select.select([self.fd, self.pipe_abort_read_r], [], [], 
timeout.time_left())
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****    
File "/usr/share/weewx/weewxd", line 260, in sigTERMhandler
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****      
raise Terminate
May 28 14:00:23 kwsweerstation weewx[11994] DEBUG __main__:     ****  
Terminate
May 28 14:00:23 kwsweerstation weewx[12001]:    ...done.
May 28 14:00:23 kwsweerstation systemd[1]: weewx.service: Succeeded.
May 28 14:00:23 kwsweerstation systemd[1]: Stopped LSB: weewx weather 
system.

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