Multi Channel Analog data display on Python based GUI from Arduino Serial port

To create a Python Tkinter GUI that fetches many comma-separated values from a serial port and displays them we can use the pyserial library to handle the serial communication. Below is a simple example demonstrating how to achieve this. Make sure you have both tkinter and pyserial installed. You can install pyserial using pip if you haven't done so already:

The arduino code is simple modified version of available AnalogReadSerial example. In the code 4 AI channels are read and one DI channel is read. Their values are transmitted over Serial port. Note the COM port number of device and change accordingly in the code.

// the setup routine runs once when you press reset: void setup() {  // initialize serial communication at 9600 bits per second:  Serial.begin(9600); } // the loop routine runs over and over again forever: void loop() {  // read the input on analog pin 0:  int Val1 = analogRead(A0);  int Val2 = analogRead(A1);  int Val3 = analogRead(A2);  int Val4 = analogRead(A3);  bool state = digitalRead(8);  // print out the value you read:  Serial.print(Val1);  Serial.print(Val2);  Serial.print(Val3);  Serial.print(Val4);  Serial.println(state);  delay(500);        // delay in between reads for stability }

Below is the Python script.

      
import tkinter as tk
import serial

# Serial port configuration
SERIAL_PORT = 'COM3'  # Change this to your serial port
BAUD_RATE = 9600

class SerialApp:
    def __init__(self, master):
        self.master = master
        self.master.title("Serial Data Display")
        
        # Create labels for each value
        self.labels = ['Val1:', 'Val2:', 'Val3:', 'Val4:']
        self.value_labels = []

        # Configure font
        label_font = ("Helvetica", 30, "bold")
        
        # Create and place labels in grid
        for i, label in enumerate(self.labels):
            lbl = tk.Label(master, text=label, font=label_font)
            lbl.grid(row=i, column=0, padx=20, pady=10)
            value_lbl = tk.Label(master, text="", font=("Helvetica", 30))
            value_lbl.grid(row=i, column=1, padx=20, pady=10)
            self.value_labels.append(value_lbl)

        # Open serial port
        self.serial_port = serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=1)

        # Update the GUI
        self.update()

    def update(self):
        try:
            # Read data from serial port
            line = self.serial_port.readline().decode('utf-8').strip()
            values = line.split(',')

            # Ensure we have four values
            if len(values) == 4:
                for value_lbl, value in zip(self.value_labels, values):
                    value_lbl.config(text=value)

        except Exception as e:
            print(f"Error: {e}")

        # Schedule the next update
        self.master.after(1000, self.update)

    def on_closing(self):
        self.serial_port.close()
        self.master.destroy()

if __name__ == "__main__":
    root = tk.Tk()
    app = SerialApp(root)

    # Handle window close event
    root.protocol("WM_DELETE_WINDOW", app.on_closing)

    root.mainloop()

The GUI will look as below

https://github.com/arihant122/Python-Tkinter-based-GUI-by-fetching-Serial-port-data-from-Arduino-