Help needed: Obstacle avoiding and line following” does not work

#1

I just assembled the mBot ranger for the 1st time and I can connect successfully to my I pad app.

Problem 1: “Obstacle avoiding” does not work correctly. The ranger moves backwards by sequentially moving one tractor drive and then the other so it zig-zags around the floor but cannot avoid any objects

Problem 2: “line following” does not work. The robot just moves forward at constant speed but cannot follow the line.

Comments: the blue LEDs/sensors (that should track the line) change polarity when there is an object placed in front of them
I can control the 3 colors from the I pad slides
I confirmed the connections are all correct

#2

Hi Tim,

Sorry for the delay duo to the National day.
We have received your email about this issue and have replied you with some troubleshooting.
Kindly check and feel free to contact us if there is still issue.

Best Regards!

#3

Thanks for your reply,

you sent me a list of other posts but I do not see any reply or information that is relevant to the specific problem I have

Can you please reply to my email since the robot does not work?

thanks
Tim

#4

Hi Tim,

We have sent you an email about suggest that you upgrade firmware for Ranger or change the battery have a check for this issue. There is no list of other posts.
Please kindly check if you got the correct one and reply us base on our email.

#5