Serial Communication Description | Omega Vehicle Security HHTFO

6SERIAL COMMUNICATION DESCRIPTION

You can communicate with your thermometer via the standard RS-232 link. A description of the cable requirements is given above, under front panel item # 3.

RS-232 functions (or commands) can be accessed with a simple terminal, with the FOB100-SOFT software package or simply with a computer and communication software (such as Windows Hyper Terminal). Your software should be set at 9600 Baud, 1 Stop-Bit and No-Parity.

6.1 Using Hyper Terminal in Windows

Hyper Terminal2 is a standard Windows program that can be easily used to exercise your HHTFO101 thermometer. To use Hyper Terminal you first set its properties as follows:

1- In the “Connection Description” window, enter a name that suits you, such as “Omega-FOB100”. Click OK.

2- In the next window, “Connect To”, select COM1 (or another COM port, if you are planning to use another port than COM1) in the box called “Connect using”. Click OK.

3- Then the COM1 Properties window will come up. As indicated above and as shown in the figure at right, set the port parameters to 9600 Baud, 1 Stop-Bit and No-Parity. Click OK.

4- You are ready to go. Type “h E” to test your setup (see below). Warning: the characters that you enter are not echoed to you!

6.2 RS-232 help menu

The following is the menu as displayed by the instrument when sending the “h” command. Note that the RS232 interface can also be used to upgrade the thermometer controlling firmware, without opening the thermometer case or changing any memory IC’s. Instructions to perform an upgrade are normally sent with the upgrade program; a PC compatible computer will be required to perform such firmware upgrade.

2 Vista users: HyperTerminal is not included with Vista. However, an equivalent program (HTPE) can be

downloaded (free for personal use) at the following website: http://www.hilgraeve.com/htpe/download.html.