User's Manual

CHAPTER 3
Advanced Functions
22
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 18.
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 key, to enter console
5. At this point, press any key to enter hermit (the bootloader).
The following message will be displayed:
Hermit V1.2.1 @00:20:54, Jun 29 2001
hermit>
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
9. 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 .img file from your computer. The
download can take several minutes.