Elbro SMS Butler SMSB131BW-K1 Relay Module, 4G/Bluetooth

Elbro SMS Butler SMSB131BW-K1 – Reliable Relay Module with SMS and Bluetooth Control

The Elbro SMS Butler SMSB131BW-K1 is a compact relay module that can be controlled remotely via the mobile network (4G) and Bluetooth. With integrated SMS interface, it enables remote switching of electrical loads – independent of an internet connection. The included power supply makes commissioning easy.

• Remote control via SMS from anywhere – switch devices on or off even without internet connection
• Bluetooth interface for convenient local configuration and control via app
• Robust relay for switching loads in building automation
• Simple installation with included power supply – ready for immediate use
• Compact design for use in distribution boxes or directly at the load

What sets the SMS Butler apart

Unlike many IoT switch modules, the SMS Butler requires no Wi-Fi or cloud connection. Control is via SMS directly, which is especially beneficial in areas with poor internet coverage or for applications that require simple, reliable remote control. The Bluetooth interface enables quick on-site configuration.

Ideal for...

Building services engineers, facility managers and operators of holiday homes who want to remotely control electrical loads such as heaters, pumps or lighting. Also suitable for IoT developers and hobbyists looking to integrate reliable SMS control into their projects.

How to use the SMS Butler

Connect the module to a power outlet using the included power supply. Connect the load to the relay output. Configure the module via Bluetooth using the manufacturer's app or send an SMS with the appropriate command to the SIM card inserted in the module. After setup, you can query or change the switching status at any time via SMS.