Actually the problem is not with the Watlow but with the Digi CM-32. The Watlow is communicating to the Digi CM-32 in Modbus RTU which has no issues with \xff characters.

See if there is some option you can set in the Digi CM-32 to allow "raw" data mode or some such. If not, you may need to implement your ethernet communication with raw TCP sockets using IO::Socket::INET, which is what Net::Telnet uses under the hood.

In reply to Re^3: Telnet.pm and IAC by thundergnat
in thread Telnet.pm and IAC by PaulNg

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