Week 10: Input Devices

Before I start with the documentary I would like to say thanks to Tobias Poppe our instructor, who had helped me to restore the serial USB port on my computer. Thanks also to Peter von der Bey and Christoph Nieß for introducing me to the function of the oscyloscope.
Aleksandra's Fab Academy site helped me to add ATmega328p to the boards in the IDE. Thanks a lot for this.
This book was also very helpful in understanding the material during that week.

ATmega 328P AU, Excerpts from the Atmel ATmega328/P Data Sheet

Sonar Sensor HC SR04 Data Sheet

"How does the sonar sensor work?" from ( www.roboter-bausatz.de )

        distance = ((duration_high_level)*(Sonic: 340m/s))/2

        

Settings for Atmega328P using Arduino IDE: Programming the board using C

Programming the Data Read Arduino IDE

            int variableName = 0;


            void setup()
            {
                                // put your setup code here, to run once:

            }

            void loop() 
            {
                                // put your main code here, to run repeatedly:

            }

            

   

            int trigger=7;                  // Definition of the pin which will read the trigger data
            int echo=6;                     // Definition of the pin which will read the echo data
            long duration=0;                // Definition of the variables I will need for calculation
            long distance=0; 

            void setup()
            {
            Serial.begin (9600);            // Setting the daud rate (serial monitor) of the serial connection between ATmega board and                                 // my computer
            pinMode(trigger, OUTPUT);       // Definition of the pin 7, which became the name "trigger" to be an "output" pin
            pinMode(echo, INPUT);           // Definition of the pin 6, which became the name "echo" to be an "output" pin
            }

            void loop()
            {
            digitalWrite(trigger, LOW);     //  Set the trigger pin to low voltage (0 V)
            delay(5); 
            digitalWrite(trigger, HIGH);    //   Set the trigger pin to high voltage (in my case 5 V)
            delay(10);              
            digitalWrite(trigger, LOW);     //  Set the trigger pin again to low voltage (0 V) - means switch the trigger on for a short time 
            duration = pulseIn(echo, HIGH); 
            distance = (duration/2) * 0.03432; 

            if (distance >= 500 || distance &<;= 0) // Look if the distance is to big or to short. If so print 'No measurement' into the print monitor
            {
            Serial.println("Kein Messwert");       // Print this string between the quotation marks and than go into the next line
            }
            else 
            {
            Serial.print(distance); 
            Serial.println(" cm"); 
            }
            delay(1000);                           // Make a pause for 1 second

        

            int trigger=PD6;                  // This Pin bekomms the name Trigger will cause a sound wave as sooon as programm starts
            int echo=PD5;                     // If the Trigger Sound wave is reflected from the wall ...
                                              // and returns to the sensor, the sensor will send a 5V signal to this pin (echo).
            long duration=0;                  // Startvalue for this variable is 0
            long distance=0;                  // Startvalue for this variable is 0
            void setup()
            {
            Serial.begin (9600);              // This is the Baudrate 9600 Bit/second which I will use for the readings
            pinMode(trigger, OUTPUT);         //Pin named "trigger" will be used as output 
            pinMode(echo, INPUT);             //Pin named "echo" will be used as output 
            }
            void loop()                       // This part of the programm will repeat during the running time of the programm
            {
            digitalWrite(trigger, LOW);       // Pin PD6 (trigger) gets a 0V signal from the microcontroller board (ATmega328p)
            delay(5); 
            digitalWrite(trigger, HIGH);      //PD6 (trigger) gets a 5V signal from the microcontroller board
            delay(10);
            digitalWrite(trigger, LOW);       //PD6 gets a 0V signal from the microcontroller board

            duration = pulseIn(echo, HIGH);   // This is definition of the variable "duration" which will count the duration of the state "high" of the Pin "echo"
            distance = (duration/2) * 0.03432; //Measured distance will be calculated using the half of the duration of the echo times the sound velocity in the air   
            if (distance >= 500 || distance <= 0) // If the result of the measurement will be smaller than 0 cm or larger then 5 meter, there should be pritnted following massage: "no rading" as error massage 
            {
            Serial.println("no reading"); 
            }
            else 
            Serial.print(duration);              // Here will be printed the measurement of the variable "duration" and "distance"
            Serial.print("\t");
            Serial.print(distance);-
            Serial.println("cm"); ‚
            }
            delay(1000); 

            }



        

Trouble shoting

Testing Python with Fab Academy code

Group Assignement: Sonar Sensor HC-SR04 data on Oscilloscope

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