Feasycom Bluetooth 5.2 low energy long range module ultra small size Silicon Labs EFR32BG21

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Product Overview


Product Description

  FSC-BT671C is a class1 support Bluetooth Low Energy (BLE) 5.2 module, the chip used by FSC-BT671C includes a 32-bit 80 MHz ARM Cortex-M33 microcontroller, which can provide a maximum power output of 20dBm.

FSC-BT671C can be used for Bluetooth mesh network application. Widely applied in light control, smart home systems and so on.


Basic Parameter



Bluetooth module model                   


Bluetooth version

BLE 5.2


Silicon Labs EFR32BG21


10mm X 11. 9mm X 1.3mm; Pad Pitch 1.1mm




2.4 - 2.4835 GHz

Transmit power


Power supply

1.71V - 3.8V

Operating Temperature

-40℃ to +105℃

Storage Temperature

-40 to +125


Ultral small size, Super long range, BLE 5.1, BLE Mesh network





Bluetooth Low Energy (BLE) 5.2

Integrate MCU to execute Bluetooth protocol stack.

Postage stamp sized form

Class 1 support (up to +20 dBm)

The default UART Baud rate is 115.2Kbps and can support from 1200bps up to 230.4Kbps

Support the OTA upgrade

UART, I2C, SPI, 12-bit 1Msps SAR ADC

Bluetooth stack profiles support: LE HID and all BLE protocols





Connected Home

Gateways and Digital Assistants

Building Automation and Security




Company Information

 Feasycom focuses on the research and development of IoT (internet of things) products. With more than 10-year experience in the wireless connectivity industry, Feasycom has massive capabilities in providing low-risk product development, reducing system integration cost and shortening product developing cycle for thousands of diverse customers worldwide.






Q1.Are you a manufacturer or a trading company?
A1: We are a manufacturer.

Q2.Can you do ODM or OEM for us?
A2: We are glad to offer custom service for you, we have an experienced engineers team who will provide you with a complete solution according to your requirements.

Q3.What is Bluetooth 5.0?
A3:Two times transmission speed compare with Bluetooth V4.2,Max Trans Speed can reach to 24Mbps.
Effective work distance can be 300m, 4 times of Bluetooth V4.2.

Q4.What is Bluetooth Dual Mode Module?
A4:Bluetooth Dual Mode Module is a Single-Module Bluetooth Solution with Built-in Bluetooth Basic Rate (BR)/Enhanced Data Rate (EDR)/Low Energy (LE) Functions.

Q5.What payment mothods do you accept?
A5:Paypal,T/T,W/U,Bank Transfering,Credit Card,Trade Assurance Payment,etc.

Q6.Lead time for sample orders/mass production orders?
A6:Samples,within 3 working days; Mass production,within 15 working days usually.

Q7.What shipping methods do you use?
A7:For samples,DHL/UPS/FEDEX/TNT,etc; For bulk orders,Air shipping and others.

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