FSC-BT671C Silicon Labs EFR32BG21 Bluetooth Low Energy BLE 5.2 Mesh Transceiver Module

FSC-BT671C is a class1 support Bluetooth module 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 10dBm.

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

Support communicating with the FeasyBlue app and many other Bluetooth apps

Basic Parameter

Bluetooth Module Model FSC-BT671C
Bluetooth version BLE 5.2
Chipset Silicon Labs EFR32BG21
Dimension 10mm X 11. 9mm X 1.8mm; Pad Pitch 1.1mm
Transmit power +10dBm(Maximum)
Profiles GATT(central/peripheral)
Frequency 2.4 - 2.4835 GHz
Power supply 1.71V - 3.8V
Storage Temperature -40℃ to +105℃
Operating Temperature -40℃ to +105℃
Highlights Ultral small size, Super long range, BLE 5.2, BLE Mesh network

Main Features

● Bluetooth Low Energy (BLE) 5.2

● Integrate MCU to execute Bluetooth protocol stack.

● Postage stamp sized form

● Class 1 support (up to +10 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



Health & Medical Devices



Home Automation



Wearable Device







Firmware Options

Firmware No. Application Profiles Support
FSC-BT671C BLE Master & Slave GATT、OTA
FSC-BT671C Other Customization


Type Title Date
Datasheet FSC-BT671C Datasheet V1.3 EN Apr1, 2022
Dimensions 11.9 × 10 × 1.8 mm
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Silicon Labs Bluetooth 5.2 Module SIG MESHFSC-BT671C Silicon Labs EFR32BG21 Bluetooth Low Energy BLE 5.2 Mesh Transceiver Module
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