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+--- Thread: RS232 (/showthread.php?tid=6020)
RS232 - JMM - 11.06.2025
Hello,
I have a client who has a Homelynk on their installation running with LM5 firmware.
Everything works perfectly except the RS232 port which is not recognized.
Do you have a solution for this?"
BR
RE: RS232 - Daniel - 11.06.2025
How did you test it?
RE: RS232 - JMM - 11.06.2025
Code:
-- Fonction pour vérifier si le port est libre (sans lsof)
function isPortFree()
local test_port = serial.open('/dev/RS232', {
baudrate = 1200,
databits = 7,
stopbits = 1,
parity = 'even',
duplex = 'half'
})
if test_port then
test_port:close()
log("Port libre")
return true
else
log("Port occupé ou inaccessible")
return false
end
end
isPortFree()And error log :
test le port rs232 11.06.2025 10:45:53
User script:3: attempt to index global 'serial' (a nil value)
stack traceback:
User script:3: in function 'isPortFree'
User script:21: in main chunk
RE: RS232 - Daniel - 11.06.2025
Actually this is correct. Hw is not the same as LM and this will not work.
RE: RS232 - JMM - 11.06.2025
OK thank Daniel.
RE: RS232 - Erwin van der Zwart - 11.06.2025
I think it will work if you add on top -> require('serial')
Code:
require('serial')
port = serial.open('/dev/RS232', {
baudrate = 38400,
databits = 8,
stopbits = 1,
parity = 'none',
duplex = 'full'
})RE: RS232 - JMM - 11.06.2025
Hello,
Yes of course I just copied the function but require('serial') is present in the script