Which bluetooth?

So I am planning on going wireless with my robots and I was wondering which one I should buy. I was looking at sparkfun and I found many blutooth. What qualities should I look for are some better than others? Also I intend to use the bluetooth for only about 100-150 ft and I am mostly going to use it for the arduino. This is what I found so far:






Thanks in advance

If you need range of up to

If you need range of up to 150 feet you will need class 1 bluetooth modules at both ends, so the $40 bluesmirf silver (class 2) module is not recommended.  May I suggest:

  1. $45 RN-41-SM (requires desoldering two surface mount resistors) - This is the same module used in the bluesmirf gold from sparkfun but for $20 less.  I suggest configuring this for maximum output power (20dBm) to achieve the greatest range.
  2. Azio Class 1 USB dongle

I’ve tested these together and had connections working beyond 200 feet.

THanks for the response. Is

THanks for the response. Is this hard to configure? Is the RN-41-SM hard to connect? Any tutorials on this? It looks like a good buy

It is not hard to

It is not hard to configure.  Provide power to the bluetooth module and use your computer to do a Bluetooth search and add the device.  This will create a COM port associated with it as it uses serial port profile (SPP).  I recommend using the terminal program TeraTerm Professional (Free) to send commands to it.  You can then send commands at 9600 baud on the serial COM port setup for the bluetooth connection using the command set in the Roving Networks documentation.  I now know of a $10 class 2 module (meaning a 30 foot range) which is configurable via serial UART only, not serial UART + Bluetooth like the Roving Networks modules.

where can I find the class 2

where can I find the class 2 module that your are talking about?


**Here’s the link: **

Here’s the link:  http://www.goodluckbuy.com/serial-bluetooth-rf-transceiver-module-rs232-w-backplane-enable-and-state-pin-1.html

What about these on ebay?

same price, also class 2 (30ft) http://cgi.ebay.nl/Serie-Bluetooth-RF-Transceiver-Modul-Module-rs232-neu-/180688314197?pt=DE_Computer_Peripherie_Netzwerk&hash=item2a11dcdf55


double post…