Hello everyone, 

I've installed a new raspbian today and triedt to start weewx after 
installation of this site: "http://www.weewx.com/docs/debian.htm"; The old 
database I had before is also copied as the conf file.
when I start the weewx I got this mesage:

May  4 10:11:36 raspi-wetter systemd[1]: Starting LSB: weewx weather 
system...
May  4 10:11:36 raspi-wetter weewx[1691] INFO __main__: Initializing weewx 
version 4.0.0
May  4 10:11:36 raspi-wetter weewx[1691] INFO __main__: Using Python 3.7.3 
(default, Dec 20 2019, 18:57:59) #012[GCC 8.3.0]
May  4 10:11:36 raspi-wetter weewx[1691] INFO __main__: Platform 
Linux-4.19.97-v7+-armv7l-with-debian-10.3
May  4 10:11:36 raspi-wetter weewx[1691] INFO __main__: Locale is 
'de_AT.UTF-8'
May  4 10:11:36 raspi-wetter weewx[1691] INFO __main__: PID file is 
/var/run/weewx.pid
May  4 10:11:36 raspi-wetter weewx[1695] INFO __main__: Using configuration 
file /etc/weewx/weewx.conf
May  4 10:11:36 raspi-wetter weewx[1695] INFO weewx.engine: Loading station 
type TE923 (weewx.drivers.te923)
May  4 10:11:36 raspi-wetter weewx[1695] INFO weewx.drivers.te923: driver 
version is 0.40
May  4 10:11:36 raspi-wetter weewx[1695] INFO weewx.drivers.te923: polling 
interval is 10
May  4 10:11:36 raspi-wetter weewx[1695] INFO weewx.drivers.te923: sensor 
map is {'windLinkStatus': 'link_wind', 'windBatteryStatus': 'bat_wind', 
'rainLinkStatus': 'link_rain', 'rainBatteryStatus': 'bat_rain', 
'uvLinkStatus': 'link_uv', 'uvBatteryStatus': 'bat_uv', 'inTemp': 't_in', 
'inHumidity': 'h_in', 'outTemp': 't_1', 'outHumidity': 'h_1', 
'outTempBatteryStatus': 'bat_1', 'outLinkStatus': 'link_1', 'extraTemp1': 
't_2', 'extraHumid1': 'h_2', 'extraBatteryStatus1': 'bat_2', 
'extraLinkStatus1': 'link_2', 'extraTemp2': 't_3', 'extraHumid2': 'h_3', 
'extraBatteryStatus2': 'bat_3', 'extraLinkStatus2': 'link_3', 'extraTemp3': 
't_4', 'extraHumid3': 'h_4', 'extraBatteryStatus3': 'bat_4', 
'extraLinkStatus3': 'link_4', 'extraTemp4': 't_5', 'extraHumid4': 'h_5', 
'extraBatteryStatus4': 'bat_5', 'extraLinkStatus4': 'link_5'}
May  4 10:11:36 raspi-wetter weewx[1679]: Starting weewx weather system: 
weewx.
May  4 10:11:36 raspi-wetter systemd[1]: Started LSB: weewx weather system.
May  4 10:11:36 raspi-wetter weewx[1695] INFO weewx.drivers.te923: Found 
device on USB bus= device=
*May  4 10:11:36 raspi-wetter weewx[1695] ERROR weewx.engine: Import of 
driver failed: unsupported operand type(s) for ^: 'int' and 'float' (<class 
'TypeError'>)*
May  4 10:11:36 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****  
Traceback (most recent call last):
May  4 10:11:36 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
File "/usr/share/weewx/weewx/engine.py", line 103, in setupStation
May  4 10:11:36 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
  self.console = loader_function(config_dict, self)
May  4 10:11:36 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
File "/usr/share/weewx/weewx/drivers/te923.py", line 456, in loader
May  4 10:11:36 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
  return TE923Driver(**config_dict[DRIVER_NAME])
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
File "/usr/share/weewx/weewx/drivers/te923.py", line 1137, in __init__
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
  self.station.open()
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
File "/usr/share/weewx/weewx/drivers/te923.py", line 1557, in open
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
  self.read_memory_size()
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
File "/usr/share/weewx/weewx/drivers/te923.py", line 1752, in 
read_memory_size
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
  buf = self._read(0xfc)
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
File "/usr/share/weewx/weewx/drivers/te923.py", line 1722, in _read
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
  buf = self._raw_read(addr)
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
File "/usr/share/weewx/weewx/drivers/te923.py", line 1582, in _raw_read
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****    
  reqbuf[5] = (reqbuf[1] ^ reqbuf[2] ^ reqbuf[3] ^ reqbuf[4])
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL weewx.engine:     ****  
TypeError: unsupported operand type(s) for ^: 'int' and 'float'
*May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL __main__: Unable to load 
driver: unsupported operand type(s) for ^: 'int' and 'float'*
May  4 10:11:37 raspi-wetter weewx[1695] CRITICAL __main__:     ****  
Exiting...


Yesterday I had a 3.9 installation which worked fine...
Is is possible just to install the 3.9 instead of the 4.0 or would I get 
troubles then?

Thanks, 
Peter



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