# MicroPython code for Wokwi ESP32/ESP8266
# Save sensor readings into a CSV file continuously

import time
import random   # using random numbers to simulate sensor values

# Initialize CSV file (write header only once)
with open("Sensor_Data.csv", "w") as f:
    f.write("S.NO,DATA,Points\n")

print("✅ CSV file created with header")

# Start logging loop
s_no = 1
while True:
    # Simulated sensor values
    data_label = chr(64 + s_no)   # A, B, C, ...
    points = random.randint(1, 5000)  # random sensor value

    # Append to CSV file
    with open("Sensor_Data.csv", "a") as f:
        f.write("{},{},{}\n".format(s_no, data_label, points))

    print(f"📤 Saved Row: {s_no},{data_label},{points}")

    s_no += 1
    if s_no > 10:   # stop after 10 rows
        print("✅ Finished writing 10 sensor readings to CSV")
        break

    time.sleep(1)  # wait 1 sec before next reading