NOAA Tide Gauge Polling and Trend Report

How it works

This Coreflux LoT template polls NOAA CO-OPS (Tides & Currents) every 6 minutes for the water level at The Battery, New York. It validates the JSON reply, publishes station fields, compares the new level with the previous sample, and emits a collapsed report document for external consumers.

Key features

• REST_API route: Fetches latest water level data from NOAA CO-OPS over HTTPS.
• 6-minute heartbeat: Self-starting polling loop gated by demo/tides/feed/enabled.
• Payload gate: Rejects bad replies before parsing by checking data[0].v.
• Trend detection: Compares the current level with the last stored level to publish rising, falling, or steady.
• Report model: Publishes a collapsed TideReport JSON document to demo/tides/reports/current.
• Metric and imperial values: Publishes water level in meters and feet.

Prerequisites

• Internet egress from the broker
• Coreflux REST_API route support
• No NOAA API key required