Bluetooth Smartphone Relay with 4 Channel Outputs


TSIR04B are 100% compatible with TSIR04. We just removed the OLED display and put the relay board in a plastic enclosure.

TinySine Bluetooth Smartphone Relay with 4 Channel Outputs, 4 optically Isolated Inputs  – TSIR04B

TSIR04B are 100% compatible with TSIR04. We just removed the OLED display and put the relay board in a plastic enclosure.

This is a TSIR04B Bluetooth version relay board with optically isolated inputs and temperature sensor port. Very powerful and easy to use. You can easily control this relay board by your computer or smartphone using bluetooth. The communication way also can be changed easily. Remove the Bluetooth Bee module instead with a WiFiBee, it becomes a WIFI relay. It will be a USB relay when you plug a USBBee. Very convenient to use.

The TSIR04 provides four volt free contact relay outputs with a current rating of up to 10Amp each. The module is powered from 12VDC power supply. The DC input jack is 2.1mm with positive core polarity, The relays are SPDT type.

Optically Isolated Inputs
TSIR04 has 4 optically Isolated input ports. Input voltage absolute Max. 30v DC, Operational 4.5v to 27v DC. TSIR0x has 2 working modes:

Normal mode: When the board reads a input signal, it will report the input states.

Auto mode: When the board reads a input signal, it will report the input states and turn on the corresponding relay. When the input voltage is removed, the relay will be turned off.

Current mode: Manual/Auto
Temperature: xxx degree

Relay power rating
If the relay is used at a voltage or current exceeding this specification, the life of the contacts may be significantly shortened.

A full datasheet for the relays used on the TSIR04 is here: G5LA datasheet

Please choose the correct DC power supply for your board.

The TSIR04 operates with an easy to use command set as described in the table shown in the product images.

TSIR04 Baud rate : 9600

Test program
To get the TSIR0x up and running in the minimum amount of time we have put together an example program to demonstrate the functionality of the module. We also provide a FREE android App TSIR Bluetooth. You can control your device by your phone very easily.


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Founded in 2009, TinySine Electronics is a smart home and open source hardware provider, catering to hardware engineers, DIY enthusiasts and interactive designers. Our ever-growing product catalog includes over 700 components and widgets from sensors, robotic platforms, communication modules to smart home relay boards.

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