DART 200 CDPD Modem User’s Guide | 5 DART Supported Protocols |
Sample UDP server setups
These settings give a general sense of the AT commands required to set up a DART 200 for a UDP application. All relevant AT commands are listed, including the defaults. All devices function differently, so the setups that follow are general. These setups show specific items to examine, but it is good practice to examine all of the setup values.
Two UDP setup examples are given:
∙Remote UDP setup - A remote telemetry application and a central client application, that shows the setup for a server modem at an RTU being polled by a host computer
∙Host UDP setup - shows the setup for a client modem at the host computer that does the polling. This modem at the host arrangement is suitable for
Remote UDP setup
The remote modem is set up as a server at the remote telemetry unit where it responds to polls from a host computer. The sample RTU does not use flow control and the data being sent is binary, not character, data. This requires the UDP server to be set up with auto answer to respond to polling, no flow control, and timed data forwarding because of the binary data.
In Table
Table 5-1. Remote UDP setup
AT Command | Req Opt Def | Description |
AT^Annn.nnn.nnn.nnn | R | Input IP Address (if not already done) |
AT\N[1,2] | R | Side Preference (get from carrier) |
AT\J0 | D | Use default - No channel access |
AT\R4 |
| restrictions |
R | Auto Registration at Power On | |
ATS13=0 | R | With AT\R4 sets Continuous |
AT\O0 |
| Automatic Registration |
R | PAD mode required for UDP. | |
AT*A2 | R | Set UDP Server mode |
AT*L2100 | D | Use default - Listen on port 2100 |
ATS0=1 | O | Activate auto answer for server |
ATS82=0 | R | Turn off backward compatibility. |
|
| Consider friends only mode if |
|
| unauthorized access is a concern. |
