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+--- Thread: Port name issue (/showthread.php?tid=2036)
Port name issue - oveh - 20.04.2019
I have a USB to M-Bus adapter(Prolific) connected to my LM5, via a powered USB-hub.
From time to time my LM stop receiving telegrams from the M-Bus adapter.
When I check the serial port name, in the system status window, the port name might have changed from "/dev/ttyUSB0" to "/dev/ttyUSB1", and my script handling the data needs to be changed accordingly to work again....
Is it possible to connect to LM via telnet/ssh and give my device a static name with udev rules?
RE: Port name issue - admin - 23.04.2019
If you only have a single USB converter you can use a function to find port name:
Code:
function findttyusb()
for _, dev in ipairs(io.ls('/dev')) do
if dev:find('ttyUSB') then
return '/dev/' .. dev
end
end
end
tty = findttyusb()
if tty then
require('serial')
port = serial.open(tty)
end