From b7c243db198c72170dad05c0f3da0aedac8ca5ff Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Tue, 29 Apr 2025 13:02:34 -0400 Subject: [PATCH] docs: Note functioning canbus required even in bridge mode in CANBUS.md Signed-off-by: Kevin O'Connor --- docs/CANBUS.md | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/docs/CANBUS.md b/docs/CANBUS.md index 321f8e89..a31ba8ce 100644 --- a/docs/CANBUS.md +++ b/docs/CANBUS.md @@ -130,6 +130,15 @@ iface can0 can static and the accelerometer all communicate via a single "USB to CAN bus" interface. +* It is only valid to use USB to CAN bridge mode if there is a + functioning CAN bus with at least one other node available (in + addition to the bridge node itself). Use a standard USB + configuration if the goal is to communicate only with the single USB + device. Using USB to CAN bridge mode without a fully functioning CAN + bus (including terminating resistors and an additional node) may + result in sporadic errors even when communicating with the bridge + node. + * A USB to CAN bridge board will not appear as a USB serial device, it will not show up when running `ls /dev/serial/by-id`, and it can not be configured in Klipper's printer.cfg file with a `serial:`