Unitech HT630 User Manual page 19

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3.4 Upload/Download by ESC Command

The way to upload/download by Kermit server described in section 3.2 will need the operator to set the

terminal to Kermit server mode by selecting user command "3.COM" in User mode or calling system function

in application program.

The hardware and software of terminal is designed that the unit can be woken up (turned on) by input from the

serial port. Besides, the terminal can also be instructed to process data communication by remote ESC

commands through built-in MULTI communication protocol. (Please refer to HT630 Technical Binder for detail

information)

After linking the terminal to a PC/host through RS232 interface, a communication program running on host

first sends a few of dummy bytes to the terminal and delays for about 500 mini-second to remotely wake up

the unit. Then, the program can be sent out a data pack of a remote ESC command that matches the MULTI

protocol to the terminal and instruct the terminal for certain process.

For instance, the terminal will automatically be executed the system routine to upload a file after receiving the

valid "File upload" ESC command. Meanwhile, the program running on the host should follow the control flow

of MULTI protocol and process to receive the data.

For detailed description of each ESC command and protocol, please see the HT630 Programming Reference

Manual.

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