reg:exp

Testing, Testing: Wireless 3D Accelerometer

Received some Arduni Prototyping Shields from SparkFun a week ago and finally put one to use: This is a ugly, bulky prototype of a 3D wireless accelerometer, using Pascal Stang's ADXL V1.1 3D accelerometer board and SparkFun's BlueSMiRF bluetooth module.

Lessons learned:
* The BlueSMiRF header on the shield is NOT connected to the UART (D0, D1), but to pins D2, D3. I had to solder my own connector to use the Bluetooth module as a "wireless serial cable". Boo.
* When sending a lot of data (OSC messages at ~100Hz), the BlueSMiRF chokes and is not discoverable from the PC anymore. Putting in lots of delays helped, but made the sensor reporting rather sluggish. Should probably not send anything out until a secure serial connection is established in the first place - maybe use the free microswitch on the shield to start/stop sending?

Posted by Bjoern Hartmann at November 14, 2006 3:45 AM