Initial commit

server/models/Heartbeat.js

@@ -0,0 +1,82 @@
+const { DataTypes } = require('sequelize');
+
+module.exports = (sequelize) => {
+  const Heartbeat = sequelize.define('Heartbeat', {
+    id: {
+      type: DataTypes.UUID,
+      defaultValue: DataTypes.UUIDV4,
+      primaryKey: true
+    },
+    device_id: {
+      type: DataTypes.INTEGER,
+      allowNull: false,
+      references: {
+        model: 'devices',
+        key: 'id'
+      },
+      comment: 'ID of the device sending heartbeat'
+    },
+    device_key: {
+      type: DataTypes.STRING,
+      allowNull: false,
+      comment: 'Unique key of the sensor from heartbeat message'
+    },
+    signal_strength: {
+      type: DataTypes.INTEGER,
+      allowNull: true,
+      comment: 'Signal strength at time of heartbeat'
+    },
+    battery_level: {
+      type: DataTypes.INTEGER,
+      allowNull: true,
+      comment: 'Battery level percentage (0-100)'
+    },
+    temperature: {
+      type: DataTypes.DECIMAL(4, 1),
+      allowNull: true,
+      comment: 'Device temperature in Celsius'
+    },
+    uptime: {
+      type: DataTypes.BIGINT,
+      allowNull: true,
+      comment: 'Device uptime in seconds'
+    },
+    memory_usage: {
+      type: DataTypes.INTEGER,
+      allowNull: true,
+      comment: 'Memory usage percentage'
+    },
+    firmware_version: {
+      type: DataTypes.STRING,
+      allowNull: true,
+      comment: 'Firmware version reported in heartbeat'
+    },
+    received_at: {
+      type: DataTypes.DATE,
+      defaultValue: DataTypes.NOW,
+      comment: 'When heartbeat was received by server'
+    },
+    created_at: {
+      type: DataTypes.DATE,
+      defaultValue: DataTypes.NOW
+    }
+  }, {
+    tableName: 'heartbeats',
+    timestamps: true,
+    createdAt: 'created_at',
+    updatedAt: false,
+    indexes: [
+      {
+        fields: ['device_id']
+      },
+      {
+        fields: ['received_at']
+      },
+      {
+        fields: ['device_id', 'received_at']
+      }
+    ]
+  });
+
+  return Heartbeat;
+};