Hello, I’ve just bought a BlueSMiRF Gold (TTL level).
I have correctly connected to SSC-32 and everything seems to work…At first it connects, I can get Firmware version with command VER, I can Enter in command mode and exit…Seems to work… I can move a servo with the slider of the LynxMotion Terminal, but after some movements the BlueSMIRF seems to disconnect.
I’ve tried to check internal data of BlueSMIRF but the configuration of the serial port is correct and is the same of SSC-32, and LynxTerm.
I’ve tried to connect it from different BT USB adapter but the result is the same.
I’m sure SSC-32 works because I use it with a nullmodem cable, so I don’t know what to do…
In your experience soemthing similar has happened to somebody ?
My Bluesmirf is this one:
RN 41 AT
sparkfun.com/datasheets/Wireless/Bluetooth/rn-bluetooth-um.pdf
Thanks to everybody
What’s the power to the logic on the SSC-32? I wonder if it’s drooping.
Another thought, try running the BlueSmirf to another device, like a BB2, see if it drops the link there. A way to verify the PC end would also be useful.
I’m using BlueSmirf, but haven’t heard of that problem.
Alan KM6VV
Hi Alan,
Thanks for your reply!
Well, actually the power is 9V from a transistor type Battery, the power is also shared to VS1. I’m experimenting Servo moving since I’m writing a program to drive SSC32.
Do you think that this power isn’t strong enough for BlueSMIRF ?
I can try to feed SSC-32 with a 9v from a multipurpose Power supply unit and see what happens…
I can try to create a cable to interface a PC serial to SMIRF and try to communicate with two pc as if they had a Null modem cable… this is what you mean, right ?
I will let you know…
Thanks
Please don’t try to power the SSC-32 (logic and servos) from a 9vdc battery… 
You are asking for trouble. Leave the 9vdc battery connected to VL remove the jumper VS1=VL and connect a 6vdc power supply to VS for the servos.
Yeah, 9V is too much for most servos, and way too much for a Blue Smirf!
I’d split up the supplies, make sure the Blue Smirf is on the regulated 5V line.
And a 9V battery can’t supply the current necessary to properly drive a servo; not to mention that most R/C servos are rated more like 5 or 6V.
By the way, you ARE connecting the Blue Smirf to the TTL lines, and not the RS-232 connector (DB9) aren’t you?
I was saying to hook up your Blue Smirf to a uP board if you have one. The Bot Board II is an example. Use a TTL interface and see how it communicates.
Alan KM6VV
Oh no… 
The BlueSMIRF is connected as this scheme
But, concerning the power supply for logic, I thought that if 9v is required, this power was lowered to 6v for servos…
Well, now I must fix some problems
- Leave power supplies separated, Logic, Servos1 and Servos2
- Can I trust this Scheme for connecting BlueSMIRF power ?
Yes this schematic is the correct way to connect it.
VL means voltage for the logic regulator. This is what powers up the regulator to feed 5vdc to the SSC-32. The regulator provides 5vdc for the microcontroller and any devices connected to the 5vdc lines on the board.
VS means voltage for the servos. This is not altered in any way. It is a direct connection to where the servos are plugged in.
On a side note. It will not damage anything to power a servo from a 9vdc battery. (Transistor radio type) The battery will only supply a few hundred milliamps. As soon as the servo is moving the voltage from that 9vdc battery drops to about 7vdc. It will deplete the battery in a very short time, but there really isn’t enough current to damage the servo. The problem here is the same 9vdc battery is powering the VL which can easily drop out and reset the SSC-32 micro…
THANK YOU GUYS!!!
The problem was the power supply to VL + VS from that battery… Probably when servos were moving the power wasn’t enough for everything so the BlueSMIRF dropped connection.
Now, 9V battery feeds VL only, and a PSU feeds with 6v VS1… I think that in my future application there will be 2 separates batteries for VS1 and VS2… The best solution!
This BT modem is great! And of course SSC-32…
Thank you for help!