Bluetooth module (WRL-08461, BGB203) stuck in data mode

Wireless & IoT
1

I recently purchased a [WRL-08461 Bluetooth DIP module (based on the Philips BGB203).

Unfortunately, I seem to have managed to get the device stuck in data mode (apparently, to enable DTR to control command mode, you must also enable DTR/DSR flow control in the UART flags). I didn’t explicitly store these settings to flash (due to concern over this exact problem), but it seems that the AT+BTAUT command stored at least some of them to flash when I told the device to enter server mode.

So, my question is this: is there any way to get the device back in to command mode? (with escape sequences disabled, and DTR not setup correctly)

I’ve seen a few references to a “factory settings tool” and an “external configuration program” in the 1SPP firmware user guide, but I’ve been unable to locate anything of the sort (or much other documentation on this chip/firmware, for that matter).

Any help in resolving this issue would be much appreciated.

Thanks,

Dan](Bluetooth DIP Module - Roving Networks - WRL-08550 - SparkFun Electronics)

2

Dan,

I had the same problems with my WRL-08469 module which uses the same Philips chip.

If you establish a bluetooth link between your device and a host which should work seeing you have issued the AT+BTAUT and I presume a AT+BTSRV command and then break the link from the host end, the module will go into command mode and accept commands. Reading the manual this should not be so but it worked for me.

Good Luck

Robert

3

I think I’m having the exact same problem. I just wrote a post about it, before I found this thread:

viewtopic.php?t=10405

Dan, did you ever find a solution to kick the BGB203 back into command mode?

I tried Robert’s suggestion, repeatedly opening and closing RFCOMM connections from the PC end- no luck.

In my current setup, I have my microcontroller programmed to repeatedly send “+++AT&F” to the BGM203 until it gets an “OK” response back. While this is running, I have a program on the PC repeatedly opening and closing the connection. I receive the “+++AT&F” on the PC just fine, but there’s no sign of any reply from the BGM203 back to the microcontroller.

4

Unfortunately, no, I haven’t yet found a solution.

I too tried Robert’s suggestion (though not as exhaustively as you), but without any success.

I’ve been too busy with other things since then to really mess with it any more…

5

Hi,

I recently purchased WRL-08474 (Philips BGB203). can any one tell me how to enter to command mode i mean can i send the commands through Hyperterminal by establishing bluetooth connection. I need to configure the baudrate. How do i know the default settings for the device?