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BMD-34 series (open CPU)

Stand-alone Bluetooth low energy 5.0 modules

Full Bluetooth 5 long range and Thread and Zigbee (802.15.4) solution

  • Powerful, ultra-efficient 64 MHz 32-bit Arm® Cortex®-M4 with FPU, 1 MB Flash, and 256 kB RAM
  • Bluetooth 5 long range support (Coded PHY)
  • USB 2.0 and Built-in DC-DC converter for direct USB / Li-Ion power
  • Hardware cryptographic unit for secure boot and over-the-air updates
  • Optional PA/LNA for extreme range
BMD-345BMD-341BMD-340
10.2 × 15.0 × 1.9 (2.0) mm

Product variants

BMD-340

with internal PCB antenna

BMD-341

with U.FL connector for external antenna

BMD-345

with PA/LNA and U.FL connector for external antenna

Product variantsBMD-340BMD-341BMD-345
Antenna 
Internal antenna
Connector for external antenna
Short range features 
Chip insidenRF52840
Bluetooth qualificationv5.0 (Bluetooth low energy)
Bluetooth low energy output power EIRP [dBm]71316
Maximum range [m]5007501000
Maximum number of connections20
Additional standardThread / Zigbee, NFC
Microprocessor on board  
Standalone module open CPU
Interfaces 
UART2
USB1
SPI4
TWI (I2C compatible)2
I2S1
GPIO4844
ADC8
PWM16
PDM1
Electrical data 
Minimum supply [V]1.702.00
Maximum supply [V]5.53.6
Environmental data, quality & reliability 
Maximum temperature [°C]85
Minimum temperature [°C]-40
Size [mm]10.2 x 15.0 x 1.910.2 x 15.0 x 2.0
Features 
Bluetooth mesh
FOTA
Secure boot
Simultaneous GATT server and client

Product Summary

Quick Start

User Guide

Data Sheet

Application Note

CAD/CAE Libraries

Information Note

Conformity and Certification

Overview