Overview: Bluetooth v4.0 Central Mode

The BL620 makes it easy to add single-mode Bluetooth Low Energy (BLE), also known as Bluetooth Smart, to small, portable, power-conscious devices, including those powered by AAA or coin cell batteries. The BL620 offers central mode, unique in the BL600 series. The unique feature of this module is smartBASIC, an event-driven programming language that enables standalone operation of the module. smartBASIC on BL620 enables wireless connections to peripheral devices that are in turn connected to sensors so that the data can be collected via GATT operations. smartBASIC has been proven to speed time to market and significantly simplifies BLE integration for embedded devices.

  • Central Mode for BLE v4.0 connections
  • Innovative smartBASIC programming language with Laird sample app library
  • Same radio hardware as BL600 (can be flashed from BL600)
  • UART, SPI, I2C, ADC, and GPIO interfaces for connecting peripherals and sensors
  • A complete BLE software stack
  • Central role functionality with GATT client and server
  • Available in BL620-SA, BL620-SC, and BL620-ST variants.


Antenna OptionsConnector TypeDevelopment Kit Contents
BL620-SASMA ConnectorSMTDevelopment board and free Software Tools
BL620-SCIPEX MHF4 Connector
BL620-STTrace Pin


  • Antenna Type
    Internal Antenna (BL620-SA), IPEX MHF4 connector (BL620-SC), or trace pin (BL620-ST)
  • Applications
    Medical Devices, AIDC, ePOS, Barcode Scanners, Industrial Cable Replacement, M2M connectivity, Automotive, Security Devices
  • BLE Services
    Generic Access, Battery Service, Device Information Service, Heart Rate Service, Health Thermometer Service, Immediate Alert Service, Link Loss Service, Tx Power Service, Blood Pressure Service
  • Bluetooth Version
    v4.0 Single Mode
  • Connector Type
  • Data Rate
    1 Mbps (over the air)
  • Development Kit Contents
    Development board and free Software Tools
  • Dimensions (L x W x H)
    19.00 x 12.50 x 3.00 mm (0.75 x 0.49 x 0.12 in)
  • Frequency
    2.402 - 2.480 GHz
  • Industries
    Automotive, Healthcare / Medical, Industrial / Production, Telecom, Computer / Gaming, Other
  • Logical Interfaces
  • Max Transmit Power
  • Product Benefits
    • Easy to interface with existing BL600 series Peripheral mode modules
    • Ultra low power consumption
    • Fast Time to Market
    • FCC, CE, IC, Taiwan (-SA version only) and Japan certified; other regulatory certifications on request
    • No external components required
    • Compact Footprint
    • Ability to connect up to four simultaneous connections
    • Custom Services to suit any application’s needs
  • Product Line
    Bluetooth v4.0 Central Mode
  • Profiles
    ANY Custom Service (plus Blood Pressure, Heart Rate, Health Thermometer, Proximity, and Find Me included in sample apps library)
  • Protocols
    Any that can be implemented using smartBASIC
  • Receive Sensitivity
    -91dBm (typical)
  • Weight
    .035 oz(< 1g)
  • Wireless Specification
    Bluetooth Version 2.0



Application Note



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