RN-42 Bluetooth Module

This module provides a very simple way to replace a serial cable connection with a Bluetooth Serial Port Profile (SPP) connection.

Hello World

Import programRN42-HelloWorld

Hello World program, looping back serial data over RN42 bluetooth

Pinout

Notes

As well has having a good set of features accessible via an AT-style command set, one great feature is that out of the box, it is configured to be a serial port host listening for an incoming serial port request. This means that immediately, without any configuration, you can pair the RN42 with a Bluetooth enabled computer, and have a 115200-8-N-1 serial connection.

Connectivity

RN42 Pinmbed Pin
1 - GNDGND
11 - VDDVout
12 - GNDGND
13 - RXp9
14 - TXp10
28 - GNDGND
29 - GNDGND

Tech Specs

  • Single 3.3v supply
  • Good power consumption figure (typical)
  • 26uA in standby
  • 25mA - Idle Connection
  • 40mA - Active connection
  • Simple interface for serial cable replacement
  • Power, Ground, Tx, Rx
  • Defaults :
  • SPP, 115,200-8-N-1
  • Bluetooth passkey "1234"

RN42 Breakout board


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