This product is discontinued and no longer available.

Suggested replacement: Serial to Bluetooth Adapter - Firefly

FireBat - Bluetooth RS232 Serial Adapter Uses AAA Batteries

4.0 stars 4.0 (4) See customer reviews


MPN: RN-270M

Manufacturer: Grid Connect Inc.

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Product Information

Product Description

The FireBat is a serial to Bluetooth Class 1 adapter that has rechargeable AAA battery capability. This adapter uses the standard Bluetooth Serial Port profile and is compatible with all clients running under Windows™ and other Bluetooth enabled  platforms. Rechargeable AAA batteries and power supply are optional.

There are three ways to utilize a FireBat:

1. Direct to a Bluetooth client: the client creates a SPP connection to the unit and uses a virtual COM style interface. Data is sent and received on the client exactly as if a serial cable was connected to a real COM port on the client.

2. Cable replacement: Pair two FireBats dongles via simple Dip switches. Or pair it with  Fireflies.

3. MASTER mode: Configure a FireBat to connect out over Bluetooth into a remote client or an access point or Bluetooth server.


  • Soft button ON/OFF switch.
  • Low battery monitor and LED indicator.
  • Automatic shutoff (programmable ) to conserve power.
  • More than 10 hours of continuous connect time.
  • accepts NiMH batteries (not included), with on board charger.
  • 5VDC charging jack (can also charge from pin 9).
  • RS232 DB9 Male Connector
  • Optional RS-422 Support.
  • Very Low power, programmable discovery and Sniff modes(1-10ma standby, 5-30ma connected).
  • Settings can be easily changed with AT commands via serial port and remotely over Bluetooth.
  • Serial Port Baudrates from 1200 to 232K pbs, and non-standard values, defaults to 9600 or 115200 (dip switch).
  • High Power (Class 1) 100Meter Bluetooth™ radio with integrated Antenna.
  • 3 LEDs, Transmit/Received data, Power/Connection Status, Low/Full/Charge mode battery.

Documents and Drivers


FireBat User Guide

Application Note - Using a Firefly with Siemens DDC Controllers


FireFly-BP RS232 Bluetooth Serial Adapter Product Information


Characters T

7 or 8 Data Bits

Connection Modes

Master, Slave, Instant Cable Replacement


DB9 - DTE (male) or DCE (female)

Control Signals


Data Rate

1200, 2400, 4800, 9600, 19.2k, 38.4k, 57.6k, 115.2k, 230k

Flow Control

Hardware (RTS/CTS) or None

Indicators LED

  • Transmit/Receive (TX/RX) Data
  • Power
  • Connection Status




odd, even, none

Power Consumption

  • Idle: 1-10 ma
  • Connected: 30-50 ma

Power Supply

  • Pin 9 of serial DB9 connector - must be regulated to 4-11 VDC
  • Wall Supply: 5 VDC @ 1A, Plug size (1.3 x 3.5 x 9.5 mm)


Serial Port Profile (SPP)


Bluetooth Specification 2.0 (with high EDR data rate!), compatible with 1.1 and 1.2


Class 1 Bluetooth (up to 100 meters)

Serial Interfaces


Serial Types


Stop Bits

1 or 2

Temperature Range

  • Storage: -40°C to +85°C (-40°F to +185°F)
  • Operating: -40°C to +70°C (-40°F to +158°F)

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