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NOTE: Though the video shows 4 channel relay, this product description is for 2 channel relay.
TOSR121 is a Bluetooth Relay kit that supports both Android and iOS and it has a password set option.
It is a convenient and easy-to-use product that be used to control any electrical types of equipment. You can pair up this device with a mobile phone or a computer.
Open the APP->Connect Device, use your phone to search for a new Bluetooth device. The module will appear as "BT Bee-BLE"(iOS) or "BT Bee-EDR"(Android). Connect it and then you can control the relays turning it ON/OFF. The communication way also can be changed easily. Replace the Bluetooth Bee module with a Wi-FiBee, it becomes a Wi-Fi relay.
TOSR121 is an upgraded version of TOSR02. It supports password. It can be set to latching or momentary outputs.
TOSR121 allows computer control switching of external devices by using the USB port of your computer. It also has a wireless extension port, it can work with Xbee or BluetoothBee or WiFibee module, so, you can control your device via ZigBee or Bluetooth or WiFi.
The TOSR121 provides four-volt free contact relay outputs with a current rating of up to 10Amp each. It comes with one DS18B20 temperature sensor port.
The module is powered using a 5V DC power supply (or USB). The DC input jack is 2.1mm with positive core polarity and the relays are SPDT types. If you want to power it with DC 12V or 24V, you just need a 12V/24V-5V DC Converter.
Note: Relay board default password is: 123456
Note: Please remove the Bluetooth module when you use USB control.
We also provide FREE Android/iOS App. You can control your device by your phone very easily.
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 TOSR121 is here: G5LA datasheet
If you use DC power, the Input voltage should be DC 5V.
First Step - Install the Driver
The TOSR121 module uses FT232RL USB to UART chip. Before using the TOSR121 you will need to download the FT232RL Driver.
Connect the TOSR121 and windows will detect it and ask for the drivers. Point windows to the inf folder and it will install the driver.
The TOSR121 will now appear as a com port.
The TOSR121 operates with an easy to use command set as described in the table below.
TOSR121 Baud rate: 9600
To get the TOSR121 up and running in the minimum amount of time we have put together an example program to demonstrate the functionality of the module.
Documents: Download all the files at once.
From China: If we ship from China, the delivery time can be from 7 working days to 15 working days. See the proof on the images below. US based orders are delivered more quickly than other countries.
Most of the USA, UK, Canada, Australia, and Germany based orders are delivered within 7 days. However, because of customs related processes, it can sometimes take up to 15 days. Check out all the shipment proof images on this page.
From Australia: If you have chosen standard post, you will receive your parcel in 3-5 days (in Australia) and 5-7 days (outside Australia)
If you have chosen economy post, you will receive your parcel in 3-5 days (in Australia) and 15-25 days (outside Australia)
What is the proof that we really ship and they are delivered ?
Where do we ship from ?
We ship our products from Australia and China depending upon what you purchase. BuildCircuit's original products are shipped from Australia.