I have a simple little demo program for my Ultimate2 robot but it only runs for a few seconds before it stops. The robot continues to move in the direction it was going but is clearly not executing the program. The serial monitor stops receiving data. And I have a loop counter which would send execution to an abort sequence where is stops and displays a signature LED display. The loop counter never senses the about which means that the loop section of the program is not even being invoked. I thought it might be a battery problem but it happens every time, even with new 1.6v batteries and even when I have an A/C adapter supplying the power. It runs for 30 to 90 seconds, then execution ceases. Are there any known causes for this? Thanks for any suggestions!
Gary