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OBS421 series

Stand-alone dual-mode Bluetooth modules

OBS421 series is an older generation product. For new designs see:
NINA-B111
Stand-alone Bluetooth low energy modules with NFC
NINA-B221
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

Product variants

CB-OBS421i-24

Internal antenna

CB-OBS421x-24

U.FL antenna connector

Product variantsCB-OBS421i-24CB-OBS421x-24
Antenna 
Internal antenna
Connector (active) for external antenna
Area 
Global
Bluetooth profiles and services 
Bluetooth SPP
Bluetooth DUN
Bluetooth PAN
Bluetooth GATT
u-blox low energy serial port service
Microprocessor on board  
Standalone module open CPU
Interfaces 
UART1
GPIO9
Electrical data 
Minimum supply [V]3.00
Maximum supply [V]6.0
Environmental data, quality & reliability 
Maximum temperature [°C]85
Minimum temperature [°C]-30
Size [mm]16 x 36 x 2.6
Features 
AT command support
Bluetooth with enhanced data rate
Extended data mode protocol
Factory programmed MAC address(es)
Low emission mode
Other 
MarketsIndustry, Smart Cities, Healthcare, Retail, Smart Home & Buildings