Fab Academy 2019 - Lucas Lim
16. Interface and Application Programming

Assignment :

Week 16 learning journey :

Following up on 'week 11 - Input Devices', I attempt to work on a GUI interface for my ultrasonic distance measuring sensor using Python as well as another programming language like javascript which is web-based.

Work in progress...

I refer to this tutorial on Python - GUI Programming (Tkinter)

My ATTiny44 microcontroller code :

  Title: Ultrasonic_sensor.ino
  Author: Lucas Lim 
  Date Created: 2/4/2019
  Last Modified: 4/4/2019
  Purpose: To activate Ultrasonic sensor and send data to computer

  Ultrasonic sensor Pins:
     VCC: +5V DC
     Trig : Trigger (INPUT) - Arduino Pin9 (PB1)
     Echo: Echo (OUTPUT) - Arduino Pin10 (PB0)
     GND: GND

  Original code created by Rui Santos, https://randomnerdtutorials.com

SoftwareSerial mySerial(1, 0); // RX, TX

int trigPin = 9;    // Trigger
int echoPin = 10;   // Echo
long duration, cm, inches;
void setup() {
  //Serial Port begin
  mySerial.begin (9600);
  //Define inputs and outputs
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
void loop() {
  // The sensor is triggered by a HIGH pulse of 10 or more microseconds.
  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
  digitalWrite(trigPin, LOW);
  digitalWrite(trigPin, HIGH);
  digitalWrite(trigPin, LOW);
  // Read the signal from the sensor: a HIGH pulse whose
  // duration is the time (in microseconds) from the sending
  // of the ping to the reception of its echo off of an object.
  pinMode(echoPin, INPUT);
  duration = pulseIn(echoPin, HIGH);
  // Convert the time into a distance
  cm = duration/58;         // uS divide by 58 to give cm
  inches = duration/148;    // uS divide by 148 to give inches
  mySerial.print("in, ");
  //delay(1000); //delay 1 secs

My first Python code

I am new to Python programming and after hearing Python mentioned a couple of time during lesson, therefore I would like to explore on it. In the future, I hope to be like Neil to create UI (User interface) using python.

My FTDI connector is detected as 'COM4' port.

My simple Python code to read in the data from the ultrasonic input device :

#  Title: Ultrasonic_sensor.py
#  Author: Lucas Lim 
#  Date Created: 2/4/2019
#  Last Modified: 4/4/2019
#  Purpose: To read data from Ultrasonic Sensor board
#import serial library
import serial
#open serial port
ser = serial.Serial('COM4', 9600)
# displayed serial port info
print (ser)
# displayed data read from from COM port
while True:
     print ((ser.readline()).decode('utf-8'))

Files :

My design in Fusion 360 :
My file

References :