2014-05-29 聚會手記

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yan

$ nosetests —nocapture -v mytest.py

SymPy
http://docs.sympy.org/latest/tutorial/basic_operations.html

http://www.electroind.com/pdf/Modbus_messaging_on_TCPIP_implementation_guide_V11.pdf
PDU (Protocol Data Unit)
Function Code | Data
ADU (Application Data Unit) (8 bytes)
Additional address | PDU | Error Check (CRC16(PDU))
MODBUS TCP/IP ADU (12 bytes)
MBAP Header | PDU