Try adding weewx user to the dialout group and restarting weewx:
sudo usermod -aG dialout weewx
sudo systemctl restart weewx
On Tue, Feb 6, 2024 at 1:45 PM Mark Conner <mconn...@gmail.com> wrote:
> Hi,
>
> I recently tried to upgrade my weewx installation from 5.0 to 5.0.1 on my
> Raspberry Pi 2 using 'sudo apt-get' and afterwards I was unable to start
> weewxd. I am reading from a Davis Vantage Pro2 with a serial logger via a
> MeteoPi interface. Thinking it was an upgrade problem, I downgraded to
> 5.0.0 and still have the same issue. Here are the weewxd related lines
> from startup from /var/log/syslog:
>
> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Initializing
>> weewxd version 5.0.0
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Command line:
>> /usr/share/weewx/weewxd.py /etc/weewx/weewx.conf
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Using Python
>> 3.9.2 (default, Mar 12 2021, 04:06:34) #012[GCC 10.2.1 20210110]
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Located at
>> /usr/bin/python3
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Platform
>> Linux-6.1.21-v7+-armv7l-with-glibc2.31
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Locale:
>> 'en_US'
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Entry path:
>> /usr/share/weewx/weewxd.py
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: WEEWX_ROOT: /
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Configuration
>> file: /etc/weewx/weewx.conf
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: User module:
>> /etc/weewx/bin/user
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO __main__: Debug: 0
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: INFO weewx.engine: Loading
>> station type Vantage (weewx.drivers.vantage)
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: ERROR weewx.engine: Import
>> of driver failed: [Errno 13] could not open port /dev/ttyAMA0: [Errno 13]
>> Permission denied: '/dev/ttyAMA0' (<class
>> 'serial.serialutil.SerialException'>)
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** Traceback (most recent call last):
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File
>> "/usr/local/lib/python3.9/dist-packages/serial/serialposix.py", line 322,
>> in open
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY |
>> os.O_NONBLOCK)
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** PermissionError: [Errno 13] Permission denied: '/dev/ttyAMA0'
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> ****
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** During handling of the above exception, another exception occurred:
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> ****
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** Traceback (most recent call last):
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File "/usr/share/weewx/weewx/engine.py", line 115, in setupStation
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** self.console = loader_function(config_dict, self)
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File "/usr/share/weewx/weewx/drivers/vantage.py", line 32, in loader
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** return VantageService(engine, config_dict)
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File "/usr/share/weewx/weewx/drivers/vantage.py", line 2046, in
>> __init__
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** Vantage.__init__(self, **config_dict[DRIVER_NAME])
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File "/usr/share/weewx/weewx/drivers/vantage.py", line 536, in
>> __init__
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** self.port.openPort()
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File "/usr/share/weewx/weewx/drivers/vantage.py", line 319, in
>> openPort
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** self.serial_port = serial.Serial(self.port, self.baudrate,
>> timeout=self.timeout)
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File "/usr/local/lib/python3.9/dist-packages/serial/serialutil.py",
>> line 244, in __init__
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** self.open()
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** File
>> "/usr/local/lib/python3.9/dist-packages/serial/serialposix.py", line 325,
>> in open
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** raise SerialException(msg.errno, "could not open port {}:
>> {}".format(self._port, msg))
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL weewx.engine:
>> **** serial.serialutil.SerialException: [Errno 13] could not open port
>> /dev/ttyAMA0: [Errno 13] Permission denied: '/dev/ttyAMA0'
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL __main__: Unable to
>> load driver: [Errno 13] could not open port /dev/ttyAMA0: [Errno 13]
>> Permission denied: '/dev/ttyAMA0'
>> Feb 6 13:29:00 raspberrypi110 weewxd[2836]: CRITICAL __main__: ****
>> Exiting...
>
>
> I did not change anything myself related to /dev/ttyAMA0 in the
> upgrade/downgrade process. What is strange is that I can read current data
> from the VP2 using weectl.
>
> pi@raspberrypi110:~ $ sudo weectl device --current
>> Using configuration file /etc/weewx/weewx.conf
>> Using driver weewx.drivers.vantage.
>> Using Vantage driver version 3.6.2 (weewx.drivers.vantage)
>> Querying the station for current weather data...
>> 2024-02-06 13:38:37 CST (1707248317) 'barometer': '30.073',
>> 'consBatteryVoltage': '4.71', 'dateTime': '1707248317', 'dayET': '0.0',
>> 'dayRain': '0.0', 'extraAlarm1': '0', 'extraAlarm2': '0', 'extraAlarm3':
>> '0', 'extraAlarm4': '0', 'extraAlarm5': '0', 'extraAlarm6': '0',
>> 'extraAlarm7': '0', 'extraAlarm8': '0', 'extraTemp1': '35.0',
>> 'forecastIcon': '7', 'forecastRule': '60', 'inHumidity': '38.0',
>> 'insideAlarm': '0', 'inTemp': '69.6', 'monthET': '0.0', 'monthRain':
>> '0.01', 'outHumidity': '74.0', 'outsideAlarm1': '0', 'outsideAlarm2': '0',
>> 'outTemp': '50.6', 'rain': 'None', 'rainAlarm': '0', 'rainRate': '0.0',
>> 'soilLeafAlarm1': '0', 'soilLeafAlarm2': '0', 'soilLeafAlarm3': '0',
>> 'soilLeafAlarm4': '0', 'stormRain': '0.0', 'sunrise': '1707226320',
>> 'sunset': '1707263280', 'txBatteryStatus': '0', 'usUnits': '1', 'windDir':
>> '156.0', 'windSpeed': '10.0', 'windSpeed10': '6.0', 'yearET': '0.0',
>> 'yearRain': '0.02'
>
>
> Below is an ls -l of /dev/ttyAMA0
>
>>
>> pi@raspberrypi110:~ $ ls -l /dev/ttyAMA0
>> crw-rw---- 1 root dialout 204, 64 Feb 6 13:38 /dev/ttyAMA0
>
>
> Original installation of weewx on this device was approximately 4.8.0.
>
> I have tried both a "shutdown -r" and a shutdown/power-cycle in an attempt
> to clear the error.
>
> - Mark
>
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