FSC-BT825 RTL8761 Dual-Mode BT 4.2 Module for Data Transmission (Low Power and support MFi & iBeacon)


FSC-BT825 is a compact Bluetooth module compliant with Bluetooth 4.2 dual mode protocols (BR/EDR and LE), supporting profiles like SPP, HID, GATT, and ATT. It integrates a Baseband controller and RF antenna, providing flexibility in product design shapes. Communication is facilitated through a UART port, and integration with Feasycom’s Bluetooth stack simplifies software customization for various applications.


  • Fully qualified Bluetooth 4.2/4.0/3.0/2.1/2.0/1.2/1.1
  • Postage stamp sized form factor
  • Low power
  • Class 1.5 support (high output power)
  • The default UART Baud rate is 115.2 Kbps and can support from 1200 bps up to 921.6 Kbps
  • UART, PCM hardware interfaces
  • Bluetooth stack profiles support: SPP, HID, GATT, ATT, GAP
  • Support Apple MFi (iAP2), iBeacon


  • Smart Watch and Bluetooth Bracelet
  • Health & Medical devices
  • Wireless POS
  • Measurement and monitoring systems
  • Industrial sensors and controls
  • Asset tracking


General Specification
Chip Set RTL8761
Product ID FSC-BT825
Dimensions (mm) 10.8 × 13.5 × 1.8
Bluetooth Specification Bluetooth V4.2 (Dual Mode)
Power Supply 3.3 Volt DC
Output Power 5.5 dBm (Class 1.5)
Sensitivity -82 dBm @ 0.1% BER
Frequency Band 2.402 ~ 2.480 GHz ISM band
Modulation GFSK, π/4-DQPSK, 8-DPSK
Baseband Crystal OSC 40 MHz
Hopping & channels 1600 hops/sec, 1MHz channel space, 79 Channels (BT 4.2 to 2MHz channel space)
RF Input Impedance 50 ohms
Antenna Internal (Default) External (Option)
Interface UART, PCM
Advanced Feature MFi, Airsync, iBeacon
Temperature 0ºC to +70 ºC
Humidity 10% ~ 95% Non-Condensing
Environmental RoHS Compliant
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