a) have you tried connecting the envoy to the rpi3 via a powered usb hub rather than the rpi usb port? b) are you using a GOOD rpi3 power supply?
On Monday, 19 December 2016 21:43:27 UTC+2, Ford Donald wrote: > I'm running weewx latest on a series 3 raspberrypi, using Davis Weather > Envoy (fw 3.15) to record and transfer data. Connection is USB, using the > factory cable with added iron chokes at both ends. Station is VP2+ wireless. > > Booting the RPi up works fine and weewx starts normally. But, 100% of the > time the data collection fails to start, usually with this: > > Dec 19 13:33:00 raspi-weather weewx[1548]: engine: Starting up weewx > version 3.6.2 > Dec 19 13:33:00 raspi-weather weewx[1548]: engine: Clock error is -24.96 > seconds (positive is fast) > Dec 19 13:33:00 raspi-weather weewx[1548]: vantage: Clock set to > 2016-12-19 13:33:01 CST (1482175981) > Dec 19 13:33:07 raspi-weather weewx[1548]: vantage: DMPAFT try #1; error: > Time out in get_data_with_crc16 > Dec 19 13:33:20 raspi-weather weewx[1548]: vantage: DMPAFT try #2; error: > Time out in get_data_with_crc16 > Dec 19 13:33:32 raspi-weather weewx[1548]: vantage: DMPAFT try #3; error: > Time out in get_data_with_crc16 > Dec 19 13:33:44 raspi-weather weewx[1548]: vantage: DMPAFT try #4; error: > Time out in get_data_with_crc16 > Dec 19 13:33:44 raspi-weather weewx[1548]: vantage: DMPAFT max tries (4) > exceeded. > Dec 19 13:33:44 raspi-weather weewx[1548]: engine: Caught WeeWxIOError: > Max tries exceeded while getting archive data. > Dec 19 13:33:44 raspi-weather weewx[1548]: **** Waiting 60 seconds then > retrying... > > I've followed the guidance online about changing cables and adding chokes. > The original Envoy cable tends to be the best. Envoy is powered by line > power, so battery power isn't an issue. > > I can usually get things going eventually if I stop and start weewx > repeatedly until the errors clear and WUnderground rapidfire starts to > flow. If I leave it along after that it does pretty well. But, security > patches come along and after patching this process starts again. > > Otherwise, normal operation looks like this: > > Dec 19 13:41:05 raspi-weather weewx[1548]: engine: Starting main packet > loop. > Dec 19 13:41:10 raspi-weather weewx[1548]: vantage: LOOP try #1; error: > Expected to read 99 chars; got 0 instead > > Thanks for reading, > Ford > > > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
