Can't solve mBot Blockly step 5-3

#1

Hi there, we are stuck at the step 5-3 of the scratch learning program. The wait until block and obstacle ahead block. Mbots doesn’t stop nor does it recognized that there is a wall…

#2

engelden-kacan-robot

can you share a picture

#3

Hi Spot1903,
Please check if you have the correct code.
Also please make sure the ultrasonic sensor is connected to port 3 and worked properly.

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Thanks.

#4

@tech_support I’m having the same problem. I’ve now tried troubleshooting steps outlined in the knowledge article. Check the connect on port 3 and the sense has a red light on. I’ve updated the firmware and the batteries are Duracell and brand new. The mBot is brand new as well purchased from Amazon last week.

#5

Try changing the block to move backward. This may be a glitch. :confused: But please try it anyway @Tamarak. Good luck!

#6

Thank you.

I gave this a try and the mBot would not stop moving backward even with an object planted in front of it.

I tried using my PC with the sensor test code mentioned here:

Got stuck pretty fast as the “say” option wasn’t available to me as outlined in the word document.

#7

@Tamarak Hmm… Try uploading some test codes to the mBot to see if the sensors are all operating correctly.

#8

@Tamarak @mesut @Spot1903 @everyone

Here is the correct code and the hint:

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To use this code, please make sure that the ultrasonic sensor is plugged in to port 3, then place the mBot in an unobstructed area. Run the code, wait a second or so, and then move your hand in front of mBot’s sensor (about 3 inches (7.62 centimeters) away). The mBot should stop moving. I have no issues!