Sure thing, here’s a minimal, clean Python script to log power output from your floating algae‑driven array. It assumes you have a sensor that gives you voltage and current over a serial port, and you want to write the readings to a CSV for later analysis. Feel free to tweak the serial settings or add more sophistication later. ```python import csv import serial import time from datetime import datetime # Serial port configuration – adjust to your hardware SERIAL_PORT = "/dev/ttyUSB0" # or "COM3" on Windows BAUD_RATE = 9600 READ_TIMEOUT = 2 # seconds # Output file CSV_FILE = "power_log.csv" def parse_sensor_data(line): """ Expected format from sensor: "V:12.3 I:1.45" Returns voltage (float) and current (float). """ try: parts = line.strip().split() voltage = float(parts[0].split(":")[1]) current = float(parts[1].split(":")[1]) return voltage, current except Exception: return None, None def main(): # Open serial connection ser = serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=READ_TIMEOUT) # Prepare CSV with open(CSV_FILE, "a", newline="") as csvfile: writer = csv.writer(csvfile) # Write header if file empty csvfile.seek(0) if not csvfile.read(1): writer.writerow(["timestamp", "voltage", "current", "power"]) while True: line = ser.readline().decode('utf-8') voltage, current = parse_sensor_data(line) if voltage is not None and current is not None: power = voltage * current ts = datetime.utcnow().isoformat() writer.writerow([ts, f"{voltage:.2f}", f"{current:.2f}", f"{power:.2f}"]) print(f"{ts} | V={voltage:.2f} V, I={current:.2f} A, P={power:.2f} W") else: print(f"Ignored malformed line: {line.strip()}") time.sleep(1) # adjust sampling interval as needed if __name__ == "__main__": try: main() except KeyboardInterrupt: print("\nLogging stopped.") ```

Got it. I’ll bump the timeout and add a quick LED toggle to confirm each logged sample. Here’s the updated snippet—just plug in the pin number that your board uses for the LED. ```python import csv import serial import time from datetime import datetime import RPi.GPIO as GPIO # Serial port configuration SERIAL_PORT = "/dev/ttyUSB0" # or "COM3" on Windows BAUD_RATE = 9600 READ_TIMEOUT = 5 # give algae plenty of gossip time # LED pin LED_PIN = 17 # change to whatever pin you wired # Output file CSV_FILE = "power_log.csv" def parse_sensor_data(line): try: parts = line.strip().split() voltage = float(parts[0].split(":")[1]) current = float(parts[1].split(":")[1]) return voltage, current except Exception: return None, None def init_led(): GPIO.setmode(GPIO.BCM) GPIO.setup(LED_PIN, GPIO.OUT) GPIO.output(LED_PIN, GPIO.LOW) def toggle_led(): GPIO.output(LED_PIN, not GPIO.input(LED_PIN)) def main(): init_led() ser = serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=READ_TIMEOUT) with open(CSV_FILE, "a", newline="") as csvfile: writer = csv.writer(csvfile) csvfile.seek(0) if not csvfile.read(1): writer.writerow(["timestamp", "voltage", "current", "power"]) while True: line = ser.readline().decode('utf-8') voltage, current = parse_sensor_data(line) if voltage is not None and current is not None: power = voltage * current ts = datetime.utcnow().isoformat() writer.writerow([ts, f"{voltage:.2f}", f"{current:.2f}", f"{power:.2f}"]) print(f"{ts} | V={voltage:.2f} V, I={current:.2f} A, P={power:.2f} W") toggle_led() # flash LED for each successful log else: print(f"Ignored malformed line: {line.strip()}") time.sleep(1) if __name__ == "__main__": try: main() except KeyboardInterrupt: GPIO.cleanup() print("\nLogging stopped.") ```

Glad the LED vibes with the algae chatter—adding a tiny pause before the next toggle so the flash is visible, and the cleanup stays in place. Here’s the tweak: insert `time.sleep(0.2)` right after `toggle_led()` so the LED stays on long enough to be noticed. Good luck keeping the currents calm.