unsupported operand type(s) for -: 'int' and 'NoneType'

[Peter Hurn]

Hi All, 

I am getting the following Critical error on a clean install of Weewx, any ideas, no additional addons.

Nov 7 18:00:30 raspberrypi weewx[615] INFO weewx.engine: Using binding 'wx_binding' to database 'weewx.sdb'
Nov 7 18:00:30 raspberrypi weewx[615] INFO weewx.manager: Starting backfill of daily summaries
Nov 7 18:00:30 raspberrypi weewx[615] INFO user.ws6in1: find_my_device::success getting dev
Nov 7 18:00:30 raspberrypi kernel: [ 866.527875] usb 1-1.2.1: reset full-speed USB device number 6 using dwc_otg
Nov 7 18:00:31 raspberrypi weewx[615] INFO user.ws6in1: initialise_my_device::success getting configuration
Nov 7 18:00:31 raspberrypi weewx[615] INFO user.ws6in1: initialise_my_device::my_cfg.bConfigurationValue = 1
Nov 7 18:00:31 raspberrypi weewx[615] INFO user.ws6in1: initialise_my_device::my_cfg.bNumInterfaces = 1
Nov 7 18:00:32 raspberrypi weewx[615] INFO weewx.engine: Main loop exiting. Shutting engine down.
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: Caught unrecoverable exception:
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** unsupported operand type(s) for -: 'int' and 'NoneType'
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** Traceback (most recent call last):
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** File "/usr/share/weewx/weewxd", line 154, in main
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** engine.run()
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** File "/usr/share/weewx/weewx/engine.py", line 173, in run
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** self.dispatchEvent(weewx.Event(weewx.STARTUP))
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** File "/usr/share/weewx/weewx/engine.py", line 241, in dispatchEvent
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** callback(event)
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** File "/usr/share/weewx/weewx/engine.py", line 580, in startup
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** self._catchup(self.engine.console.genStartupRecords)
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** File "/usr/share/weewx/weewx/engine.py", line 690, in _catchup
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** for record in generator(lastgood_ts):
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** File "/usr/share/weewx/user/ws6in1.py", line 1231, in genStartupRecords
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** packet = self.decode(level)
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** File "/usr/share/weewx/user/ws6in1.py", line 729, in decode
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** my_interval = my_time - self.last_ts
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** TypeError: unsupported operand type(s) for -: 'int' and 'NoneType'
Nov 7 18:00:32 raspberrypi weewx[615] CRITICAL main: **** Exiting.  

[Tom Keffer]

Looks like the author of ws6in1 forgot to check for the case where self.last_ts could be None. This can happen when a brand new database.

I'd submit a bug report on his GitHub repository.

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[Bob Atchley]

Yes ... spot on, missed that one ... a fix on the way

Bob

[Peter Hurn]

Thanks Both, and thanks Bob for updating the driver, I'll test it now.