20200703

1. SLAVE:: fix AVR_MODBUS_ReadSerialNumber()
2. MASTER:: delete AvrModbusMasterSetSlavePollFunction()

20200623

1. SLAVE:: add AVR_MODBUS_ReadSerialNumber (0x73)

20191010

1. apply "SysTypedef.h"
2. apply AvrUart(20191010)

20190828

1. SLAVE:: add AvrModbusSlaveSetMapStartAddr()
2. SLAVE:: add CustomFrameCheck()

20190507

1. MASTER:: add AVR_MODBUS_ReadInput(0x04)
2. MASTER:: add AvrModbusMasterSetSlavePollFunction()

20190416

1. SLAVE:: fix bug AvrModbusSlaveProc()

20190319

1. MASTER:: add AvrModbusMasterAddSlavePollData()
2. MASTER:: check memory allocate fail

20190110

1. SLAVE:: add PreUserException()
2. MASTER:: change to public FindSlaveById() -> AvrModbusMasterFindSlaveById()

20181023

1. MASTER:: fix bug AvrModbusMasterAddSlave()
2. MASTER:: fix bug FindSlaveById()

20180906

1. MASTER:: fix bug AVR_MODBUS_PresetMultiple()