I'm currently writing a Python program intended to write data out to a Raspberry Pico microcontroller using the pyserial module, with a Tkinter graphical user interface. However, the Pico doesn't appear to be picking up what I write to it over the serial cable when I press the button corresponding to that command on the interface.
This is the code that I have:
import serial
import time
import tkinter as tk
def activate_serial():
with serial.Serial('COM12', 9600, timeout=1) as ser:
while ser.in_waiting>0:
out = ser.readline()
print(out)
time.sleep(0.5)
def send_data():
serial.Serial('COM12', 9600, timeout=1).write(bytes(str(1)+'\n','utf-8'))
gui = tk.Tk()
label_no = tk.Label(text="Entry")
send = tk.Button(text="Send Command", command=send_data())
input_mod = tk.Entry()
label_no.pack()
input_mod.pack()
send.pack()
gui.after(500,activate_serial)
gui.mainloop()
How it's supposed to work is that the Tkinter interface opens first; then, the after command runs the code block to connect to the serial monitor. From that point onwards, whenever I press the button on the GUI, it should write out a '1' to the Pico, which then sends it back and writes it out to get printed by the Python code using this code, in the Arduino IDE language:
void setup() {
Serial.begin(9600);
}
void loop() {
if (Serial.available()>0)
{
int dataIn = Serial.parseInt();
Serial.readString();
digitalWrite(LED_BUILTIN, HIGH);
delay(100);
digitalWrite(LED_BUILTIN, LOW);
Serial.println(dataIn);
}
}
Whenever I run the program, the GUI opens without error, and I can press the button. However, even though I've tried running the Arduino and Python codes a number of times, it never gets to the point where the input gets written back out to my output line (I'm testing/running this in PyCharm).
