Serial port / raspberry

#1

I have 8 arduino's connected to my pi
after a few days randomly a serial port disconnects
only way to solve this problem is doing a reboot and then it works again for few days / hours

is this a known problem or is there a trick to solve this or make the port reconnect?

#2

i’ve has one thing attached via serial port that’s been stable for over a year.

What versions of node-red nodejs are you using?
have you checked to see if there’s anything in the logs?

#3

8.12.0 and 0.19.4

on another pi i have 4 similar setups running for more then a year too with 4 serial ports
it seems to be the problem that it is more the 4 ports or because they are connected with hubs
all ready changed the hubs with several different hubs ( powered ) but without any succes too

#4

When they disconnect are they still there but just as a differently numbered port ? If this is a linux system you may want to investigate fixing the name to the device using udev eg https://www.silabs.com/community/interface/knowledge-base.entry.html/2016/06/06/fixed_tty_deviceass-XzTf or http://hintshop.ludvig.co.nz/show/persistent-names-usb-serial-devices/ etc

1 Like
#5

I need to test this, but all is build inside a table.
They are when the problem starts connected and nothing is changed on the setup
After reboot all ports are mapped to the correct port