Fix BinaryPayloadBuilder/Decoder

[dhoomakethu]

Versions

• Python: 2.7-3
• OS: NA
• Pymodbus: 1.4.0
• Modbus Hardware (if used): NA

Pymodbus Specific

• Server: tcp/rtu/ascii - sync/async
• Client: tcp/rtu/ascii - sync/async

Description

Modbus Payload Server with datablocks built using BinaryPayloadBuilder does not store data in correct register order

reported by @bosnj on gitter

Code and Logs

 # code and logs here.
builder = BinaryPayloadBuilder(byteorder=Endian.Little, wordorder=Endian.Little)
builder.add_32bit_uint(500046)
decoder = BinaryPayloadDecoder.fromRegisters(builder.to_registers(), wordorder=Endian.Little, byteorder=Endian.Little)
decoder.decode_32bit_uint()
>>> 117460641

simple_sim.py
simple_client.py

[dhoomakethu]

fixed with Pymodbus 1.5.0. refer releases or dev branch