Using COM port with Excel VBA

[Captain_Nemo]

Hello Leith and others,

I think i need some additional loop in my "read" sub to check whether the instrument is in XON or XOFF state otherwise my script runs amok. Something like

do

'Needed code snippet! readout of deviceComState 

if deviceComState=XON then
exit do
 else
'nothing
 end if

loop

but I can't figure out how to retrieve the deviceComState.

Maybe someone can help.

Thanks Robert