IoT Node-RED MQTT

Project Overview

The flow simulates IoT data generation and processing using a local Mosquitto MQTT broker.
It includes:

• Periodic message generation with random IDs and timestamps
• Publishing messages to an MQTT topic
• Subscribing to messages and processing based on specific conditions
• CSV logging of generated IDs, published temperature data, and ACK messages

Features

1. ID Generator – Generates random IDs and timestamps every 5 seconds.
2. CSV Logging – Saves ID logs (id_log.csv), filtered temperature data (filtered_publish.csv), and ACK logs (ack_log.csv).
3. Topic Subscription & Processing – Extracts N from ID (N = ID % 7711) and retrieves related CSV row.
4. Publish Message Builder – Builds MQTT messages based on CSV row data.

Requirements

• Node-RED
• Mosquitto MQTT Broker
• ThingSpeak account (for data visualization)
• Node-RED Dashboard nodes