FSC-BT671 Silicon Labs EFR32BG13 BLE 5.0 SIG Mesh MCU Module with 19dBm Maximum Output Power


The Feasycom FSC-BT671 use a Bluetooth low-power chip includes a 40 MHz ARM Cortex-M4 microcontroller which delivers a maximum power output of 19 dBm. The chip's maximum receive sensitivity is -93 (1 Mops 2 GFSK) dBm, supporting a complete DSP instruction set and floating point unit for faster calculations. Low-power Gecko technology, support fast wake-up time and energy-saving modes. The BT671 software and SDK support for Bluetooth Low Energy (LE), Bluetooth 5 and Bluetooth mesh networks. The module also support for proprietary wireless protocol development. FSC-BT671 combines an energy-friendly MCU with a highly integrated radio transceiver. The module is suited for any battery operated application other systems requiring high performance and low energy consumption.


  • Compatible with Bluetooth Low Energy 4.2/5.0 and Bluetooth mesh specifications
  • Integrate MCU to execute Bluetooth protocol stack
  • Postage stamp sized form
  • Low power consumption
  • Class 1 support (up to +19 dBm)
  • The default UART Baud rate is 115.2Kbps and can support from 1200bps up to 230.4Kbps
  • UART, I2C, SPI, and 12-bit ADC (200ks/S) data connection interfaces
  • Supports the OTA upgrade
  • Bluetooth stack profiles support LE HID and all BLE protocols
  • PWM
  • An external 32.768 kHz crystal oscillator provides accurate timing reference for low energy modes


  • IoT Sensors and End Devices
  • Health & Medical Devices
  • Home Automation
  • Accessories Devices
  • Human Interface Devices
  • Metering Devices
  • Commercial and Retail Lighting and Sensing


Bluetooth Module FSC-BT671
Chipset Silicon Labs EFR32BG13
Bluetooth Standard BLE 5.0/4.2
Frequency Band 2.4~2.4835GHz
Transmit Output Power +19 dBm (Max.)
Receive Sensitivity -93 dBm (Typ.)
Profiles GATT, MFi
Interfaces UART, GPIO, I2C, ADC, PWM
Size (mm) 10 × 11.9 × 1.3 (1.1mm Pad Pitch)
Power Supply 1.8~3.8V
Operating Temperature -40℃ to +85℃
Storage Temperature -50℃ to +150℃

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