Adcon A720 Betriebsanweisung PDF herunterladen (Seite 58)

CHAPTER 3

Advanced Functions

6. Now type upgrade.

7. The system waits for a file to be sent using the Y-modem

protocol. Configure your terminal program to send via the Y-

modem protocol, switch your communication program to

Send, and send the .hmt file from your computer.

8. After a series of messages, the system asks for confirmation.

Press Y. The bootloader will now be replaced.

9. Restart the gateway by typing linux.

After Linux finishes booting, the gateway is again ready for use.

To upgrade the system

1. Make sure that you have a new system image (the image file

name usually ends with .img).

2. Log in as root, as explained in the first step of “Stopping and

Starting the Telemetry Gateway” on page 54.

3. Type reboot.

4. Several messages will appear (the procedure can take some

20 seconds). Wait until you see the following message:

Please stand by while rebooting the system.

Restarting system.

Waiting 5 sec for <ESC>, <DEL>, or <BS> to

enter console

5. At this point, press the <ESC>, <DEL>, or <backspace> key

to enter hermit (the bootloader). The following message will

be displayed:

Hermit V1.2.3 @19:14:31, Oct 30 2001

hermit>

Note: Systems with older hermit versions may display a message

stating that any key can be pressed.

6. Change the serial port speed by typing set speed 115200.

7. Change the speed of the communications program to 115200

baud, then press Enter. You’ll see the hermit> prompt again.

8. Type upgrade.

Note: On systems with hermit release 1.2.3 or higher, you can also

type upgrade -y 115200, and then change the speed of

your terminal to 115200 baud. After starting the Y-modem

transfer, the gateway will not prompt you until the upgrade

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Adcon A720 Betriebsanweisung Seite 58