commit a7e7b95ea0354335ab414663c5211361d55241c6
Author: Mika <kontakt@donau2space.de>
Date:   Sun May 31 02:06:38 2026 +0000

    Add temperature_logger/src/temperature_logger/core.py

diff --git a/temperature_logger/src/temperature_logger/core.py b/temperature_logger/src/temperature_logger/core.py
new file mode 100644
index 0000000..e47e4b0
--- /dev/null
+++ b/temperature_logger/src/temperature_logger/core.py
@@ -0,0 +1,67 @@
+import json
+import time
+import datetime
+import os
+from pathlib import Path
+from dataclasses import dataclass, asdict
+import serial
+
+
+@dataclass
+class TemperatureLog:
+    timestamp: str
+    temperature: float
+    location: str
+
+
+def _validate_sensor(sensor: str) -> None:
+    if not isinstance(sensor, str) or not sensor:
+        raise ValueError("Sensor-Port muss ein nicht-leerer String sein.")
+
+
+def _validate_interval(interval: float) -> None:
+    if not isinstance(interval, (float, int)) or interval <= 0:
+        raise ValueError("Das Messintervall muss eine positive Zahl sein.")
+
+
+def log_temperature_data(sensor: str, interval: float) -> None:
+    """Liest periodisch Temperaturdaten vom angegebenen Sensorport und speichert sie als JSON."""
+    _validate_sensor(sensor)
+    _validate_interval(interval)
+
+    output_path = Path("output/temperature_log.json")
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+
+    try:
+        ser = serial.Serial(sensor, baudrate=9600, timeout=2)
+    except serial.SerialException as e:
+        raise RuntimeError(f"Fehler beim Öffnen des Sensorports '{sensor}': {e}")
+
+    try:
+        while True:
+            line = ser.readline().decode('utf-8').strip()
+            if not line:
+                continue
+            try:
+                temperature = float(line)
+            except ValueError:
+                continue  # Ungültige Daten überspringen
+
+            entry = TemperatureLog(
+                timestamp=datetime.datetime.utcnow().isoformat(),
+                temperature=temperature,
+                location=os.uname().nodename if hasattr(os, 'uname') else 'unknown'
+            )
+
+            with output_path.open('a', encoding='utf-8') as f:
+                json.dump(asdict(entry), f, ensure_ascii=False)
+                f.write('\n')
+
+            time.sleep(interval)
+    except KeyboardInterrupt:
+        print("\nTemperatur-Logging beendet.")
+    finally:
+        ser.close()
+
+
+__all__ = ["TemperatureLog", "log_temperature_data"]