FSC-BT677C Silicon Labs EFR32BG21 Bluetooth Low Energy BLE 5.2 SIG Mesh Module

Feasycom FSC-BT677C EFR32BG21 Bluetooth module with Bluetooth BLE 5.2 specification, it can be widely used for Bluetooth mesh applications, including connected lighting, smart plugs, gateways and voice assistants.

The Bluetooth low energy chip used by FSC-BT677C includes a 32-bit 80MHz ARM Cortex-M33 micro controller, which can provide a maximum power output of 10 dBm.

The chip's maximum receiving sensitivity is -97.5(1 Mbit/s GFSK) dBm, and it supports a complete DSP instruction and floating-point unit for efficient signal processing.It supports Wirepas Mesh protocal

Support communicating with the FeasyBlue app and many other Bluetooth apps

Basic Parameter

Bluetooth Module Model FSC-BT677C
Bluetooth version BLE 5.2
Dimension 13mm X 16.5mm X 1.62mm; Pad Pitch 1.27mm
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 Ultra small size, Class 1, BLE 5.2, BLE Mesh network

Main Features

● Compatible with Bluetooth 5, Bluetooth 5.1 and Bluetooth mesh specification
● 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
● UART, 12-bit 1Msps SAR ADC
● Support the OTA upgrade
● Bluetooth stack profiles support: LE HID and all BLE protocols


Connected lighting



Home Automation



Gateways and Voice Assistants




Building Automation


Type Title Date
Datasheet FSC-BT677C Datasheet V1.1 EN.pdf Apr1, 2022
Dimensions 16.5 × 13 × 1.62 mm
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FSC-BT677C Silicon Labs EFR32BG21 Bluetooth Low Energy BLE 5.2 SIG Mesh Module
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