server + getting sensor id + json in esp32

server/models.py

@@ -0,0 +1,25 @@
+from datetime import datetime, timezone
+
+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()
+
+
+class Sensor(db.Model):
+    __tablename__ = "sensor"
+
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(128), nullable=False, unique=True)
+    created_at = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))
+
+    readouts = db.relationship("SensorReadout", backref="sensor", lazy=True)
+
+
+class SensorReadout(db.Model):
+    __tablename__ = "sensor_readout"
+
+    id = db.Column(db.Integer, primary_key=True)
+    sensor_id = db.Column(db.Integer, db.ForeignKey("sensor.id"), nullable=False)
+    type = db.Column(db.String(64), nullable=False)
+    value = db.Column(db.Float, nullable=False)
+    timestamp = db.Column(db.DateTime, default=lambda: datetime.now(timezone.utc))