b) Master reads data (normal process)
SlaveMaster
1) ENQ code (05H)
2) 
ACK code (06H)
3)
Read command (ASCII code)
4)
ACK code (06H)
5) 
Read data (ASCII code)
6)
ACK code (06H)
1)Session starts when ENQ is sent from master to slave.
2)Slave acknowledges by returning ACK to master.
3)Master sends read data command to slave.
4)Slave receives read data command, then acknowledges by returning ACK code to master.
5)Slave sends read data to master.
6)Master receives read data, then acknowledges by returning ACK code to slave.
3