OBS421 series

Stand-alone dual-mode Bluetooth modules

OBS421 series is an older generation product. For new designs see:

NINA-B1 series (open CPU)NINA-B1 series (open CPU)

NINA-B1 series (open CPU)

Stand-alone Bluetooth 5.0 low energy modules with NFC

NINA-B2 series (u-connect)NINA-B2 series (u-connect)

NINA-B2 series (u-connect)

Stand-alone dual-mode Bluetooth modules

Proven dual-mode Bluetooth modules with best performance and multi-point functionality

  • Bluetooth v4.0 with Bluetooth low energy and Bluetooth BR/EDR (dual-mode Bluetooth)
  • Embedded stack (SPP, DUN, PAN, GATT)
  • Low Emission Mode® limits interference with other 2.4GHz RF
  • u-blox Low Energy Serial Port Service
  • High throughput of 1.3 Mbps
  • Advanced multipoint capability with 7 slaves

S

standard

Standard

professional

Professional

automotive

Automotive

Product variants

CB-OBS421i-24

Internal antenna

CB-OBS421x-24

U.FL antenna connector

Product Selection
Documentation & resources
Product variantsCB-OBS421i-24CB-OBS421x-24
Area  
Global
Short Range Features  
Bluetooth profiles and servicesBluetooth SPP, Bluetooth DUN, Bluetooth PAN, Bluetooth GATT, u-blox low energy serial port service
CPU Features  
Microprocessor on boardStandalone module open CPU
Interfaces  
UART1
GPIO9
Electrical data  
Maximum supply [V]6
Minimum supply [V]3
Environmental data,
quality & reliability
 
Maximum temperature [°C]85
Minimum temperature [°C]-30
Features 
AT command support
Bluetooth with enhanced data rate
Extended data mode protocol
Factory programmed MAC address(es)
Low emission mode
General Features 
AntennasInternal antennaConnector (active) for external antenna
Dimensions 
Dimensions [mm]36 x 16 x 2.6
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