Page 7 of 11 King Pigeon Hi-Tech. Co., Ltd. Ver 1.3
Remote Relay Switch
8. Settings&Operation
***Strongly Recommend using t e APP to program it***
Notice:
1. The default Password is 1234.
2. The unit cannot support PIN Code Protected SIMCard.
. You can program the GSM unit with SMS commands using your phone.
4. Remember that commands must be CAPITAL LETTERS. It is PWD not pwd, CAP not Cap etc. Don't add
spaces or any other character.
5. The pwd in the commands is means the password, when you use it, please in stand of it by the digital
number; the capital letters PWD is the command letter, use PWD directly.
6. In some GSM operators they use different SMS parameter; the units can’t return the SMS confirmation in
some gsm operators, but it can performance the functions correctly. Also, you can try to add the country
code before the number, see the below settings:
7. If the password is correct but the command is incorrect, the RTU502x will return: SMS ormat Error,
Please check Caps Lock in Command! So please check the Command, or add the country code before
the telephone number or check the input is in ENGLISH INPUT METHOD and CAPS LOCK. If password
incorrect then will not any response SMS.
8. Once the Unit received the SMS Command, will return SMS to confirmation, if no SMS return, please
check your command or resend again.
9. The SMS commands that you will certainly use in the GSM units are the following:
**SMS Commands For Program and Operation the RTU502x**
1) Commands error return SMS
Event Return SMS Content
Any incorrect Command SMS Format Error, Please check Caps Lock in Command!
2) External DC Status
Event Return SMS Content
External DC Power Goes OFF External Power Goes OFF
External DC Power Goes ON External Power Goes ON
3) Modify Password(4digits, Default is: 1234)
Command Return SMS Example
PWD
＋
P
＋
new password
[new password],This is the New Password,
please remember it carefully.
234P432 stands for change
password from 234 to 432
For example:
E.g.: the country code is 0086, or +86.
The user cell hone number is 13600000000 and has been assigned as a SMS Alert number, the simcard
number in the anel is 13512345678.
When you setu the number as the authorized number, lease setu as 008613600000000 or
+86136000000000. Not 13600000000.
