Has anybody experience with MODBUS to read temp sensors?

[Rudy M]

Hi Petr,

Testing with Your tips concerning the Linux commands I saw no ttyUSB0 but ttyASM0

(Search via Google "ttyUSB0 ttyASM0" gives a lot of links)

So I did a test and in Your two last listings I changed the ttyUSB0 by ttyASM0

And thereafter both listings gave NOT anymore the the two errors: "File not found" or "Wrong slave adress".

I toke a print screen of both responces of Your Listings:









I did a simple third test: I disconnected the USB connector from my PC (==> error 'File not found')

Your last two programs running without errors give me hope that things will work out.
I hope we're on the right track now.

Greetings,
Rudy M