High performance Bluetooth Smart Ready serial port module

OBS421 dual-mode Bluetooth moduleThe OBS421 is a complete dual-mode Bluetooth (Bluetooth Smart Ready) module with UART logic level interface for transparent serial data transmissions. The module can thus send serial data both through Classic Bluetooth via the Serial Port Profile (SPP) and Bluetooth low energy via the u-blox Low Energy Serial Port Service.

In addition, the OBS421 can be used as a Bluetooth Smart Ready client for any host and to access any Bluetooth Smart device that implements services based on the Generic Attribute Profile (GATT). In other words, the OBS421 can connect to any Bluetooth low energy sensor to get access the device’s standard services or other implemented custom services such as a Battery Service or an Automation I/O Service. The OBS421 can also be used in applications where a smartphone, tablet or laptop is to connect to a serial device such as a Programmable Logic Controller (PLC).

With the Bluetooth stack embedded, you can be up and running quickly as there is no need for a driver or stack in your host. The module is fully Bluetooth qualified and provides modular radio type approvals for the US, Europe, Japan and Canada (FCC, R&TTE, MIC, IC). The OBS421 is also compliant with EMC, Safety and Medical standards.

The robust module provides a plug-and-play solution to replace conventional serial cables up to 300 meters and throughput up to 1.3 Mbps. The operating temperature range is –30°C to +85°C.

Highlights

  • Bluetooth v4.0 with Bluetooth low energy and Classic Bluetooth (Bluetooth Smart Ready)
  • Embedded dual-mode Bluetooth stack (SPP, DUN, PAN, GATT)
  • u-blox Low Energy Serial Port Service
  • GATT support for Bluetooth Smart
  • Wireless Multidrop™ with 7 slaves

Click here for high resolution image.

See the OBS421 product summary for a visual overview of the Bluetooth and Wi-Fi modules' capabilities.

Features

  • Bluetooth v4.0 (Bluetooth low energy and Classic Bluetooth)
  • Range:
    • 250 m, internal antenna
    • 300 m, external antenna
  • Output power:
    • 11 dBm, internal antenna
    • 13 dBm, external antenna
  • Throughput: 1.3 Mbps (Classic Bluetooth)
  • Embedded software:
    • u-blox Bluetooth stack
    • Serial port application
  • Bluetooth profiles & services:
    • u-blox Low Energy Serial Port Service
    • Generic Attribute Profile (GATT)
    • Serial Port Profile (SPP)
    • Dial-up networking Profile (DUN GW,
      DUN DT)
    • Personal Area Networking Profile (PAN) roles: PANU & NAP
  • Profile roles:
    • Central Role
    • Peripheral Role
  • Max. number of slaves:
    • 7 Classic Bluetooth only
    • 3 Classic Bluetooth & Bluetooth low energy
  • Configuration tools:
    • AT commands via Bluetooth or serial port
    • Serial Port Toolbox (Windows-based SW)
  • Low Emission Mode®: Prevent disrupting other 2.4GHz radios
  • Wireless Multidrop™: Possible with simultaneous connections to Bluetooth low energy and Classic
    Bluetooth devices.
  • Extended Data Mode™: Separated multipoint data channels
  • Quality of Service (QoS): Ethernet packet prioritization
  • Repeater functionality: Extended range
  • Security: Simple Pairing
  • Android connectivity:
    • SPP/PAN Classic Bluetooth and Bluetooth low energy connections with Android devices (Android 4.3 and higher)
  • iOS connectivity:
    • Supports Bluetooth low energy connections with iOS devices
    • Supports Classic Bluetooth connections
      with iOS devices1
  • Electrical data:
    • RF power supply: 3.0 to 6.0 VDC
    • Power consumption: 0.6 mA @3.0V (min.),
      44 mA @3.0V (average Tx)
  • Interfaces:
    • UART logic level
    • RS232 (option via external transceiver)
    • RS422/RS485 (option via external transceiver)
    • Baud rate:
      • Max 1.5 Mbit/s
      • Support for non-standard baud rates
    • Flow control: CTS/RTS (hardware) or none
    • GPIO pins: 9
    • U.fl antenna connector (external antenna version only)
  • Package:
    • Dimensions:
      • 16.0 x 36.0 x 3.2 mm (internal antenna)
      • 16.0 x 36.0 x 2.6 mm (external antenna)
    • Weight: 2 g
    • Mounting:
      • Mounting holes
      • Machine mountable
      • Board-to-board connector
      • Solder land pads
  • Environmental data, quality & reliability:
    • Operating temperature: –30°C to +85°C
  • Certifications and approvals:
    • Type approvals:
      • Europe (ETSI R&TTE)
      • US (FCC/CFR 47 part 15 unlicensed modular transmitter approval)
      • Canada (IC RSS)
      • Japan (MIC - formerly TELEC)
    • R&TTE Directive 1999/5/EC:
      • Effective use of frequency spectrum: EN 300 328
      • EMC: EN 301 489-1, EN 301 489-17, EN 61000-6-2
      • Health and safety: EN 62479,
        EN 60950-1, IEC 60950-1
    • Medical Electrical Equipment: IEC 60601-1-2
    • Bluetooth Qualification: v4.0"Bluetooth Smart Ready" refers to a device that is compatible with both Classic Bluetooth and Bluetooth low energy, the idea being that it provides a bridge between the two technologies.
1 All current OBS421 module versions support Apple iOS connections via Bluetooth low energy. Classic Bluetooth connections are supported only by OBS421 versions with iAP support, but other special requirements also apply, see http://tinyurl.com/ndk6vj2.

Documents

Product Documentation

Video

  • View the Getting Started tutorial video that shows a u-blox Bluetooth module using a Starter Kit & Configuration PC-program.
  • View the Bluetooth low energy demo video that shows the use of the u-blox Low Energy Serial Port Service in an industrial setting with a robot, a computer, an iPhone and the modules OLS426, OBS421, and OLP425.

How to buy

  • Profile roles
    • Central Role, Peripheral Role
  • Max. number of slaves
    • 7 Classic Bluetooth only
    • 3 Classic Bluetooth & Bluetooth low energy
  • Configuration tools
    • AT commands via Bluetooth or serial port
    • Serial Port Toolbox (Windows-based SW)
  • Low Emission Mode™ prevents disrupting
    other 2.4 GHz radios
  • Wireless Multidrop™Possible with simultaneous
    connections to
    Bluetooth low energy and Classic Bluetooth devices.
  • Extended Data Mode™: separated multipoint
    data channels
  • Quality of Service (QoS)
  • Repeater functionality, extended range
  • Security Simple Pairing
  • Android connectivity: SPP/PAN
    Classic Bluetooth and Bluetooth
    low energy connections with Android d
    evices (Android 4.3
    and higher)
  • iOS connectivity: Supports Bluetooth low energy
    connections with iOS devices, supports
    Classic Bluetooth connections with iOS devices1

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