Hello,
Just checked my log to see how things were operating and found this:

Jun 16 17:45:20 weewx-RPi weewx[76976] ERROR weewx.drivers.vantage: LOOP 
max tries (4) exceeded.
Jun 16 17:45:20 weewx-RPi weewx[76976] INFO weewx.engine: Main loop 
exiting. Shutting engine down.
Jun 16 17:45:20 weewx-RPi weewx[76976] CRITICAL __main__: Caught 
WeeWxIOError: Max tries exceeded while getting LOOP data.
Jun 16 17:45:20 weewx-RPi weewx[76976] CRITICAL __main__:     ****  Waiting 
60 seconds then retrying...
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO __main__: retrying...
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: Loading station 
type Vantage (weewx.drivers.vantage)
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: StdConvert target 
unit is 0x1
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.wxservices: 
StdWXCalculate will use data binding wx_binding
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: Archive will use 
data binding wx_binding
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: Record generation 
will be attempted in 'software'
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: Using archive 
interval of 300 seconds (software record generation)
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.restx: StationRegistry: 
Registration not requested.
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.restx: Wunderground-PWS: 
Data for station KCAPLACE82 will be posted
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.restx: PWSWeather: Data 
for station k6mle will be posted
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.restx: CWOP: Data for 
station K6MLE will be posted
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.restx: WOW: Posting not 
enabled.
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.restx: AWEKAS: Posting 
not enabled.
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: 'pyephem' not 
detected, extended almanac data is not available
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO __main__: Starting up weewx 
version 4.8.0
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: Clock error is 
0.61 seconds (positive is fast)
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: Using binding 
'wx_binding' to database 'weewx.sdb'
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.manager: Starting 
backfill of daily summaries
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.manager: Daily summaries 
up to date
Jun 16 17:46:20 weewx-RPi weewx[76976] INFO weewx.engine: Starting main 
packet loop.
Jun 16 17:46:28 weewx-RPi weewx[76976] ERROR weewx.drivers.vantage: LOOP 
try #1; error: Expected to read 99 chars; got 0 instead
Jun 16 17:46:32 weewx-RPi weewx[76976] ERROR weewx.drivers.vantage: LOOP 
try #2; error: Expected to read 99 chars; got 0 instead
Jun 16 17:46:36 weewx-RPi weewx[76976] ERROR weewx.drivers.vantage: LOOP 
try #3; error: Expected to read 99 chars; got 0 instead
Jun 16 17:46:40 weewx-RPi weewx[76976] ERROR weewx.drivers.vantage: LOOP 
try #4; error: Expected to read 99 chars; got 0 instead
Jun 16 17:46:40 weewx-RPi weewx[76976] ERROR weewx.drivers.vantage: LOOP 
max tries (4) exceeded.

What might be causing this  I/O error?
Thanks,
Michael

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