SimTech SimCom SIM800 Series Application Note page 9

0x5B Sync byte confirm
0x01/0x81 Send head information
0x02 Head information confirm
0x03 Send Upgrade data
0x04 Upgrade data confirm
'P' Write flash fail
'C' Checksum error
'R' Erasing
'E' Erase error
'S' File size error
0x07 reset module
0x08 Reset module confirm
SIM800 Series_Software Upgrade_Application Note_V1.02
Smart Machine Smart Decision
MODULE->PC
PC->MODULE
MODULE->PC
PC->MODULE
MODULE->PC
MODULE->PC
MODULE->PC
MODULE->PC
MODULE->PC
MODULE->PC
PC->MODULE
MODULE ->PC
9
2014-06-30