Weewx 3.9.1 crash following bad packets from WS1
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Brad Henderson
May 14, 2019, 6:45:05 PM5/14/19
to weewx-user
Hi all,
I've had my Weewx install crash a couple of times in the last week after approximately 3 days of flawless running. The issue seems to be related to some bad packets received by the WS1, which then seem to get used by the rain calculation. I'm guessing these have not been checked that they are valid floating point values, hence the crash.
My system is running on a Raspberry Pi Model B (2012) with 512 MB of onboard memory. Standard install of weewx 3.9.1.
Log file excerpt below. Should I log this as a bug?
May 15 04:11:12 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:11:23 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:11:33 raspberrypi weewx[24976]: ws1: Failed attempt 2 of 5 to get readings: Unexpected buffer length 354
May 15 04:11:44 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:11:55 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 154
May 15 04:12:05 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:12:16 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:12:26 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 101
May 15 04:12:36 raspberrypi weewx[24976]: ws1: Failed attempt 2 of 5 to get readings: Unexpected buffer length 102
May 15 04:12:46 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:12:58 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 151
May 15 04:13:08 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:13:18 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 351
May 15 04:13:28 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 48
May 15 04:13:39 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 102
May 15 04:13:49 raspberrypi weewx[24976]: ws1: Failed attempt 2 of 5 to get readings: Unexpected buffer length 47
May 15 04:13:59 raspberrypi weewx[24976]: ws1: Failed attempt 3 of 5 to get readings: Unexpected buffer length 195
May 15 04:14:09 raspberrypi weewx[24976]: ws1: Failed attempt 1 of 5 to get readings: Unexpected buffer length 152
May 15 04:14:19 raspberrypi weewx[24976]: ws1: Failed attempt 2 of 5 to get readings: Unexpected buffer length 102
May 15 04:14:29 raspberrypi weewx[24976]: ws1: Failed attempt 3 of 5 to get readings: Unexpected buffer length 200
May 15 04:14:39 raspberrypi weewx[24976]: engine: Main loop exiting. Shutting engine down.
May 15 04:14:39 raspberrypi weewx[24976]: engine: Shutting down StdReport thread
May 15 04:14:39 raspberrypi weewx[24976]: engine: Caught unrecoverable exception in engine:
May 15 04:14:39 raspberrypi weewx[24976]: **** unsupported operand type(s) for -: 'NoneType' and 'float'
May 15 04:14:39 raspberrypi weewx[24976]: **** Traceback (most recent call last):
May 15 04:14:39 raspberrypi weewx[24976]: **** File "/usr/share/weewx/weewx/engine.py", line 890, in main
May 15 04:14:39 raspberrypi weewx[24976]: **** engine.run()
May 15 04:14:39 raspberrypi weewx[24976]: **** File "/usr/share/weewx/weewx/engine.py", line 188, in run
May 15 04:14:39 raspberrypi weewx[24976]: **** for packet in self.console.genLoopPackets():
May 15 04:14:39 raspberrypi weewx[24976]: **** File "/usr/share/weewx/weewx/drivers/ws1.py", line 126, in genLoopPackets
May 15 04:14:39 raspberrypi weewx[24976]: **** self._augment_packet(packet)
May 15 04:14:39 raspberrypi weewx[24976]: **** File "/usr/share/weewx/weewx/drivers/ws1.py", line 132, in _augment_packet
May 15 04:14:39 raspberrypi weewx[24976]: **** packet['rain'] = packet['rain_total'] - self.last_rain
May 15 04:14:39 raspberrypi weewx[24976]: **** TypeError: unsupported operand type(s) for -: 'NoneType' and 'float'
May 15 04:14:39 raspberrypi weewx[24976]: **** Exiting.
Thomas Keffer
May 16, 2019, 9:13:49 PM5/16/19
to weewx-user
Yes, it is a bug!
Fixed in commit 762215f4.
You can replace your copy of ws1.py with this copy if you want the fix. Let me know if it doesn't work for you.
-tk
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