User's Manual

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If the paket conforms to the standard (header, command word identifier, data
encapsulation format, and CRC), the corresponding reply from DTU is as follows:
Serial Port Utility (received): AA 55 AA 55 17 00 05 81 89 00 01 02 38 72
The content of the packet is 1 byte, and 0x02 indicates that the correct short
message data is received.
6 Appendix
Capturing DTU Logs
The storage space on DTU is limited. If you need to capture device running logs for a
long time for troubleshooting, you can use other software. In this example, the Serial
Interface Version1.0 software is used. You can download it from the Internet.
Connect the DTU to PC and launch the DTU configuration tool.
Step 1: Enable the DTU debugging mode, as shown in Figure 6-1.
Figure 6-1