I have a problem getting the Firmata_test programme running on my Uno R3. I am running Arduino 1.0.4 and StandardFirmata version 2.2. The problem is as per the following note on the Firmata home page:
Versions of arduino previous to 0022 (December 2010) have a baud rate error on Uno which corrupts communication. The Firmata Test program can open the serial port, and the receive counter at the bottom of the windows keeps increasing, but nothing works. If you're having this problem, you can fix it by just upgrading to a recent Arduino software version.
As I am running all the latest versions of the software, there appears to be another problem. Any help welcome. Many thanks.