How to send my data from Arduino to my computer through the ports?

Question

I am generating random data on an Arduino that stays connected to my computer and I would like to transfer this data to a local database on my computer or to a port.

I have tried to adapt the code from this post but that uses the port /dev/ttyACM0 and I'm on Windows so I replaced this part with COM7

Yet it seems to wait forever:

(venv) C:\Users\antoi\Documents\Programming\Work\two_way_communication>python main.py
Serial port COM7 opened  Baudrate 115200
Waiting for Arduino to reset

Enough blah, blah, blah. Here are my codes.

Arduino side, which uses Port COM 7, to generate data:

void setup() {
  Serial.begin(115200);
  randomSeed(analogRead(0));
}


void loop() {
  SendSensorData();
}


//function to send sensor data 
void SendSensorData() {
  String sensorData1,sensorData2,sensorData3, postData;
  sensorData1=random(25, 200);
  sensorData2=random(25, 200);
  sensorData3=random(25, 200);

  //Post Data
  postData = "sensor1=" +  sensorData1 + "&sensor2=" + sensorData2+ "&sensor3=" + sensorData3;
  Serial.println(postData);
  
  delay(1000);  
}

And, PC side main.py, to receive the data from the Arduino:

import serial
import time

startMarker = '<'
endMarker = '>'
dataStarted = False
dataBuf = ""
messageComplete = False


# ========================
# ========================
# the functions

def setupSerial(baudRate, serialPortName):
    global serialPort

    serialPort = serial.Serial(port=serialPortName, baudrate=baudRate, timeout=0, rtscts=True)

    print("Serial port " + serialPortName + " opened  Baudrate " + str(baudRate))

    waitForArduino()


# ========================

def sendToArduino(stringToSend):
    # this adds the start- and end-markers before sending
    global startMarker, endMarker, serialPort

    stringWithMarkers = (startMarker)
    stringWithMarkers += stringToSend
    stringWithMarkers += (endMarker)

    serialPort.write(stringWithMarkers.encode('utf-8'))  # encode needed for Python3


# ==================

def recvLikeArduino():
    global startMarker, endMarker, serialPort, dataStarted, dataBuf, messageComplete

    if serialPort.inWaiting() > 0 and messageComplete == False:
        x = serialPort.read().decode("utf-8")  # decode needed for Python3

        if dataStarted == True:
            if x != endMarker:
                dataBuf = dataBuf + x
            else:
                dataStarted = False
                messageComplete = True
        elif x == startMarker:
            dataBuf = ''
            dataStarted = True

    if (messageComplete == True):
        messageComplete = False
        return dataBuf
    else:
        return "XXX"

    # ==================


def waitForArduino():
    # wait until the Arduino sends 'Arduino is ready' - allows time for Arduino reset
    # it also ensures that any bytes left over from a previous message are discarded

    print("Waiting for Arduino to reset")

    msg = ""
    while msg.find("Arduino is ready") == -1:
        msg = recvLikeArduino()
        if not (msg == 'XXX'):
            print(msg)


# ====================
# ====================
# the program


if __name__ == "__main__":
    setupSerial(115200, "COM7")
    count = 0
    prevTime = time.time()
    while True:
        # check for a reply
        arduinoReply = recvLikeArduino()
        if not (arduinoReply == 'XXX'):
            print("Time %s  Reply %s" % (time.time(), arduinoReply))

            # send a message at intervals
        if time.time() - prevTime > 1.0:
            sendToArduino("this is a test " + str(count))
            prevTime = time.time()
            count += 1