...Description of some features:
"No Protocol":
* Working with data in string or byte format.
* Support for different encodings.
* There are three sending modes: single, cyclic, and file sending.
"Modbus":
* Support for various Modbus protocol variations: TCP, RTU, ASCII and RTU/ASCII over TCP.
* Convenient operation with recording functions.
* The ability to work with float numbers.
* The ability to work with binary data.
* Cycle mode.
* A Modbus scanner that searches for devices on a communication line.
...
BEYE (Binary EYE) is a free, portable, advanced file viewer with built-in editor for binary, hexadecimal and disassembler modes. It contains a highlight AVR/Java/i86-AMD64/ARM-XScale/PPC-64 and other disassembler, full preview of MZ,NE,PE,ELF and other.