USR-DR504-E User Manual
Jinan USR IOT Technology Limited
Tech Support: h.usriot.com
11
2.1.2. SMS mode
Diagram 2.1.3-1 SMS transmission mode diagram
In this mode, user's serial device can send SMS to the specified mobile phone and receive SMS from any mobile
phone. User can decide whether to transmit the data of the specified mobile phone to the serial device through
Settings.
Users do not need to pay attention to the data conversion process between serial port data and SMS. They only
need to set simple parameters to realize transparent data communication between mobile phones and serial port
devices.
If the user's device is a serial port device and is placed in a remote place, this DTU can be used to realize this
function when the user wants to check the running status of the device or control the running parameters of the device
by sending and receiving SMS messages.
Setup by AT commands:
1. Set work mode to SMS mode:
AT+WKMOD=SMS
2. Set the target mobile phone number to 10086. E. g:10086:
AT+DSTNUM=10086
3.
Restart the module:
AT+Z
Note
:
1. The target phone number of SMS should be added with the international number;
2. When non-target mobile phone number filtering is enabled, the non-target mobile phone number can still
query or set parameters;
3. When a SMS longer than 140 bytes is sent to the device, the received SMS will be incomplete.
Setting by the software: