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RN-42 Bluetooth Module

Product Code: 30086
Excl. VAT: £57.11 Incl. VAT: £68.53
You will earn 57 Robo Points for buying this product

The RN-42 Bluetooth Module provides a reliable low-cost method for creating a wireless serial communication interface between two devices such as a microcontroller, PC, cell phone or another module.

This module can pair up with devices supporting Bluetooth SPP (Serial Port Profile) to establish a serial interface. The RN-42 Bluetooth Module is breadboard friendly and is compatible with all 5 V and 3.3 V microcontroller platforms.

Key Features:

  • Fully qualified Bluetooth 2.1/2.0/1.2/1.1 module provides compatibility with many devices
  • Low power consumption for long-lasting battery powered projects
  • Auto-connect/discovery/pairing modes make connecting to other modules easy
  • LED indicators provide visual status of connection/mode
  • Voltage jumper selects for use with 5 V and 3.3 V microcontrollers

Application Ideas:

  • Remote control a robot via PC, cell phone or another microcontroller
  • Measurement and monitoring systems
  • Industrial sensors and controls
  • Cable replacement (wireless serial interface)


  • 2 x 7 dual row male header with 0.1" spacing
  • Jumper selectable default baud rates: 9.6 or 115.2 Kbps
  • Command-configurable baud rate from 1.2 to 921 Kbps
  • Range: ~ 35–50 feet line of sight indoors*
  • Voltage requirements: 5.0 VDC or 3.3 VDC
  • Current requirements: ~5 mA sleep; ~15 mA idle; ~20 mA transmit; ~50mA max
  • Communication: 5V/3.3V asynchronous serial interface with RTS/CTS flow control from 1.2–921 Kbps
  • Dimensions: 2.33” x 1.16” x 0.45” in (59.18 x 29.46 x 11.43 mm)
  • Operating temp range: -40 to +185 °F (-40 to +85 °C)


  • This device supports Bluetooth Serial Port Profile (SPP). When connecting to another device please be sure your device supports SPP as well.
  • Operating throughput and range may vary depending on environmental circumstances and RF interference.
  • Please note that this product is not backwards compatible with the retired Easy Bluetooth module.

Product Attachments

View FileRN-42 Bluetooth Module Documents    Size: (160.51 KB)
View FileRN-42 Schematic    Size: (91.19 KB)
View FileRN-42 Module BASIC Stamp Code    Size: (680 Bytes)

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

Returns Policy

RN-42 Bluetooth Module

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