I've got a work-around, but just asking anyway... While messing around getting a UPS set up for the new Vue setup I did an OS update, which seems to have broken udev or something related to getting /dev/serial0 created. udev was working such that the weewx account could talk to /dev/serial0 before this. After the update, even root couldn't start weewx with this message: Jul 5 08:07:24 pi2c weewx[976]: import of driver failed: [Errno 2] could not open port /dev/serial0: [Errno 2] No such file or directory: '/dev/serial0' (<class 'serial.serialutil.SerialException'>) Jul 5 08:07:24 pi2c weewx[976]: engine: Unable to load driver: [Errno 2] could not open port /dev/serial0: [Errno 2] No such file or directory: '/dev/serial0'
enable_uart=1 is enabled in /boot/config.txt. This is about all that's interesting from the boot logs (/var/syslog): Jul 5 08:04:09 pi2c kernel: [ 1.035375] uart-pl011 20201000.serial: cts_event_workaround enabled Jul 5 08:04:09 pi2c kernel: [ 1.038405] 20201000.serial: ttyAMA0 at MMIO 0x20201000 (irq = 81, base_baud = 0) is a PL011 rev2 I ended up pointing the weewx.conf like this: port = /dev/ttyAMA0 and after that I could start weewx as weewx (not root). This is the version of the OS I have now that doens't work the same as before: Jul 5 08:04:09 pi2c kernel: [ 0.000000] Linux version 4.19.42+ (dom@dom-XPS-13-9370) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1219 Tu Jul 5 08:04:09 pi2c kernel: [ 0.000000] CPU: ARMv6-compatible processor [410fb767] revision 7 (ARMv7), cr=00c5387d pi2c_/home/weewx> cat /etc/debian_version 9.9 This is the other RPi with the VP2 that does work as expected on /dev/serial0: Mar 24 14:20:40 pi2a kernel: [ 0.000000] Linux version 4.9.35+ (dc4@dc4-XPS13-9333) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611) ) #1014 Fri Jun 30 14:34:49 BST 2017 Mar 24 14:20:40 pi2a kernel: [ 0.000000] CPU: ARMv6-compatible processor [410fb767] revision 7 (ARMv7), cr=00c5387d Mar 24 14:20:41 pi2a kernel: [ 1.010518] 20201000.serial: ttyAMA0 at MMIO 0x20201000 (irq = 81, base_baud = 0) is a PL011 rev2 Mar 24 14:20:45 pi2a kernel: [ 18.585113] uart-pl011 20201000.serial: no DMA platform data pi2a_/var/log> cat /etc/debian_version 8.0 Both are RPi model B+. Chris -- 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 weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/48fb35e2-4354-4d9b-bf8b-180632d10bec%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
