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openplotter-can's Issues

Service is started before canable interface is up

When starting up the Pi, the can read service fails to initialize correctly as the canable0 interface is not up yet (at least 9 times out of 10 for me):

     Loaded: loaded (/etc/systemd/system/openplotter-can-read.service; enabled; vendor preset: enabled)
     Active: active (running) since Fri 2023-02-03 05:16:22 GMT; 1min 35s ago
   Main PID: 429 (openplotter-can)
      Tasks: 2 (limit: 3954)
        CPU: 1.352s
     CGroup: /system.slice/openplotter-can-read.service
             └─429 /usr/bin/python3 /usr/bin/openplotter-can-read

Feb 03 05:16:22 openplotter systemd[1]: Started openplotter-can-read.service.
Feb 03 05:16:25 openplotter slcand[711]: starting on TTY device /dev/ttyOP_can
Feb 03 05:16:25 openplotter slcand[711]: failed to open TTY device /dev/ttyOP_can
Feb 03 05:16:25 openplotter openplotter-can-read[711]: /dev/ttyOP_can: No such file or directory
Feb 03 05:16:26 openplotter openplotter-can-read[792]: Cannot find device "canable0"

The problem can be fixed by adding a delay in the ExecStart directive

[Service]
ExecStartPre=/bin/sleep 10
...

Probably someone who knows systemd can come up with a elegant solution

MCP2517fd conflict

Hi,

From a fresh install CAN Bus 3.2.21-stable from Settings 3.6.0:

  • When performing a Check System:

Checking GPIO conflicts...
↳There are GPIO conflicts between the following apps:
CAN - MCP251xfd, CAN - MCP251xfd

There is nothing configured yet in CAN Bus, or /boot/config.txt
What could be the cause of this?

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