RS232

[JMM]

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

[Daniel]

How did you test it?

[JMM]

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

[Daniel]

Actually this is correct. Hw is not the same as LM and this will not work.

[JMM]

OK thank Daniel.

[Erwin van der Zwart]

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'
})

[JMM]

Hello,

Yes of course I just copied the function but require('serial') is present in the script