Error when running Lego Ultrasonic Sensor Test


#1

Getting an error when trying to run the LEGO-UltraSonic_sensor_Test.py program. The output I’m getting is posted below.

This program was working shortly before and I’m not sure what changed that broke it.

Used troubleshooting.sh to generate Problem ID 16694


#2

It does look like something has started to interfere with the serial line. Have you added any hardware, changed the way you powered the BrickPi+?


#3

I was using the battery pack when it was working, but the battery level went low and it wasn’t allowing me to connect through the vnc so I plugged it into the wall adapter. Would the wall adapter cause this issue? I’ll try replacing the batteries and see if I have the same issue using just the battery pack again. How long should the 8 AA pack last? I only used it for less than a day and it decreased to the point where I couldn’t connect to the BrickPi (no yellow light showing under battery power, only when connected to the wall)


#4

@bbaker.1213: what was the voltage and power rating of the wall adapter. 8 AA battery packs should last an hour with the motors running and a lot more without the motors but it might actually become low after continuously using it for a day.

There are a couple of options to power the BrickPi ad you can find more information about them here.

The best option is to use a USB along with rechargeable batteries for testing and when you are ready, just remove the USB.