Control Digital Output via SMS on RobustOS | Guide

How to Control Digital Output (DO) via SMS

Overview

Remote control of Digital Outputs (DOs) offers flexibility and convenience in managing connected devices. One commmon method is through a centralized management system, such as RCMS, which provides a web-based interface to monitor and control DOs from anywhere. Alternatively, a local WebGUI on the device itself allows for direct control by toggling buttons to change the DO status. For more advanced or automated control, users can leverage command-line interfaces (CLI) via SSH to send specific commands.
Finally, for situations where network connectivity is unreliable or unavailable, SMS commands provide a robust, text-based method to control DOs by sending simple instructions to the device's associated SIM card. The following are the operations to control DO through SMS.

Steps

1. Please ensure your SIM card is enabled SMS service. If you're not sure, please consult with SIM provider or Internet service provider (ISP).

2. Please enable SMS: WEBGUI -> Services -> SMS 

Note: SMS setting as shown in above photo is enabled by factory default 

3. Send command to the phone number of the SIM that use for the Robustel gateway.
SMS command format: username:password;command
Command as below (suppose the device have 2 DOs)
  1. do 1 on
  2. do 1 off
  3. do 2 on
  4. do 2 off
For example, if you want to control DO1 on, the command would be as below:

username:password;do 1 on

If the command executed successfully, device will reply OK, below photo for example.


Conclusion

To complete controlling a digital output by SMS on Robustel gateway device, verify that the authorized command changes the intended output state and the connected circuit responds as expected. This provides a simple out-of-band control method for supported field equipment.