BlueSmirf not transmitting correctly

Wireless & IoT
1

I’m brand new to this stuff so bear with me.

Right now I have a robot with an OOPic that I am communicating with from a PC through a serial cable. The robot works at 9600, 8, N, 1 with no flow control. With a serial cable all my messages get through to the robot and it reactes correctly.

Now, I’m trying to replace the serial cable with a BlueTooth USB v1.2 Module (USB dongle) on the PC side and a BlueSmirf Extended on the robot side. I believe I have it powered correctly and the computer side seems to be ok. If I jump Tx to Rx on the BlueSmirf I am able to talk to the BlueSmirf and give AT commands no problem. However, when I hook it up to the robot it does some funky stuff. All i’m sending the robot is speeds for the wheels. So when I send stuff through hyperTerminal with the BlueSmirf connected, the speeds change, however not anything like they are suppose to. So I know there are signals getting to the robot but they are not correct.

I tried soldering J1 but that had no effect. Is it a setting in the BlueSmirf that I need to change? It defaults to 9600, 8, N, 1 doesn’t it.

Any help would be great.

Nick

Just bypassed my serial interface (DS232) and connected directly to the Tx and Rx on the OOPic and it works great!

Nevermind

Nick

2

BlueSMiRF talks TTL serial, not RS232. Sounds like you got it figured out.

-Nathan

3

Greetings,

My name is addy and I just joined this group. I am currently doing a

senior design project. In our project, we are going to be using the BoeBot to simulate a campus transit system (kind of like a bus or train).

Also, we are using a bluetooth application(BRSC11A

http://www.sparkfun.com/commerce/produc … cts_id=148) to

communicate with the robot when we want to bring it back to the central

hub. But I’m not sure how to get started with it and what I will have

to tie to what on the boe bot.

I wanted to ask for suggestions before I get started trying to avoid

blowing up the dip module because they are not cheap lol. Hopefully,

someone can help me out there. Thank you for your time in advance.