IoT Node-RED MQTT

The project focuses on generating, publishing, receiving, processing, and logging MQTT messages, as well as visualizing temperature data and integrating with ThingSpeak.

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