RN-41 Bluetooth Module Problem

Wireless & IoT
1

Hi,

I’m having some troubles getting into CMD mode when connecting my RN-41 bluetooth module to my PC via a Cyber-Blue USB dongle. The software for the dongle is the BlueSoleil. The RN-41 is currently connected at pin 11(VDD) and 12(GND). I’m using Windows XP’s hypertreminal with the following specs:

-Bits per second: 115k

-Data bits: 8

-Parity: None

-Stop bits: 1

-Flow Control: None

I’ve also enabled “Echo typed characters locally” and “Append line feeds to incoming line ends” in ASCII Setup.

Everything works fine and it’ll connect via bluetooth and the COM port can be established, but when I type “$$$” nothing returns. I checked the status, and some data are being sent and recieved, but its just not going into command mode. I’m thinking it may be because I don’t have enough pins connected on the RN-41 itself. Somone please verify. Aside from that, I don’t really know what else is wrong since I tried to follow from all the other posts about this problem. Thank you.

2

From the RN-41 manual:

You must enter command mode with in the 60 second configuration window or the module will go into fast

data mode where all characters are ignored including the “$$$”. If the configuration timer expires while in

command mode the device will not go into fast data mode after exiting command mode.

You can not enter command mode from the remote Bluetooth connection if the device is in Master Mode.

So, my guess is that you are not trying to enter the command within 60 seconds of powering up the RN-41 module or the module is in master mode.

You also might want to try jumpering RTS to CTS on the RN-41 module.

3

No, I am aware of that condition, and I would reset the power each time I mess up. The device is currently in Slave mode. I will try to jump the RTS to CTS. Thank you.