If(durationRight > 0 & durationRight 0 & durationLeft 4000 & durationRight 4000 & durationLeft durationRight & durationRight > 4000) // TURN RIGHT when HUMAN is close to RIGHT sensor Pulse and Echo for LEFT Ultrasonic Sensor Process for determining and printing the durations for LEFT Ultrasonic SensorĭurationLeft = pulseIn(Echo_pinLeft,HIGH) Pulse and Echo for RIGHT Ultrasonic Sensor Process for determining and printing the durations for RIGHT Ultrasonic SensorĭurationRight = pulseIn(Echo_pinRight,HIGH) initialize the echo_pin pin as an input: MotorRight.attach(11) // RIGHT Motor is in pin 11 MotorLeft.attach(9) // LEFT Motor is in pin 9
Robotc ultrasonic sensor serial#
to confirm code is working with Serial Library Serial.println("Initializing.") // Print Initializing. Serial.begin(9600) // Set up Serial library at 9600 bps Long durationLeft // Time it takes for pulse to bounce back to LEFT Ultrasonic Sensor Long durationRight // Time it takes for pulse to bounce back to RIGHT Ultrasonic Sensor Thank you,Ĭonst int Trig_pinRight = 12 // Triggers Pulse for RIGHT Ultrasonic SensorĬonst int Echo_pinRight = 13 // Recevies Echo for RIGHT Ultrasonic SensorĬonst int Trig_pinLeft = 4 // Triggers Pulse for LEFT Ultrasonic SensorĬonst int Echo_pinLeft = 5 // Receives Echo for LEFT Ultrasonic Sensor So far we greatly enjoy the Arduino and hopefully this community can help us shed some light on our problem. I will attach our code so you can give us advice on it or possibly supply new code. Currently our ultrasonic sensors are returning values of 1 and 2 randomly and returns no other values.
We were wondering if any Arduino vets could supply us with some sample code for this project, or perhaps supply code they have used on a similar project before. We have setup the bot although we are running into problems while trying to code it. We are currently using 3 Vex motors, 3 wheels attached to said motors, and two Vex ultrasonic sensors. We are using components from Vex Robotics, which you may or may not be familiar with.
Robotc ultrasonic sensor how to#
Next time, we will look at the light sensor more and I will show you how to follow lines.2 friends and I are making a robot using our Arduino Leonardo which will move forwards and avoid obstacles in its path. So, while the touch sensor is pressed, it will run the function “one”, and when there is an object in the robot’s way, it will run the function “two”. Now, how can we incorporate functions into this? Let’s take a look. When everything is clear, the robot will simply go forward. Also, while there is an object in the way, it will stop and play an annoying beeping sound until you move the object. This program codes the robot to, while the touch sensor is pressed, back up and turn. This is an infinite loop so the program will run forever (or until you stop it.) I use that to loop the program.
What you might notice here is the “while(true)”. #pragma config(Sensor, S4, sonar, sensorSONAR) #pragma config(Sensor, S1, touch, sensorTouch) Now here is a more complex program using ultrasonic and touch sensors. I don’t use the sound sensor very often because I think it does not have much value in programs. For the ultrasonic sensor, the value is distance, and for color, the value is the reflected light. For the touch sensor, there are only two values, 0 (not pressed) or 1 (pressed). For the first line here, you put the name of the sensor, in this case “touch” in the parenthesis, use an equality (=) or inequality (!=) sign, and a set a value. This tells the robot to go forward while the touch sensor is not pressed, the go back a little when it is pressed. In this tutorial, though, I will just be going over the while statement. These are the “While” and “If” statements. In order to program sensors, we need to learn two simple but very helpful statements. You need these lines to have the sensors work. Click OK and the text should be at the top of your code. Now we dont want to type that every time, so to automatically insert it, go to Robot>Motors and Sensors Setup, and go to the sensor tab to fill in the sensor info. What’s this, you say? It is saying that the sensor is in sensor port 1, named “touch”, and it is a touch sensor. Later models come with a color sensor that replaces light, but I prefer the light over color. The NXT has four types sensors that come with it: the ultrasonic sensor, the light sensor, the touch sensor, and the sound sensor.
Sensors are the main part of the NXT, and are the items that the NXT is most useful for.
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