TagoIO | MQTT Relay

This software bridges your MQTT Broker and the TagoIO platform, allowing seamless integration and data flow. It's a fast, open-source, and scalable solution written in Rust.

Table of Contents

• Introduction
• Features
• Getting Started
  • Prerequisites
  • Installation
  • Configuration
  • Running the Relay
• Docker Setup
  • Image Variants
• CLI Commands
  • init
  • start
• Configuration File and Environment Variables
• License

Introduction

The TagoIO MQTT Relay connects to your MQTT Broker on predefined topics and redirects the information to TagoIO Devices. It uses TagoIO Integration Network and Connector, alongside an Authorization Key from your TagoIO Profile.

Features

• Written in Rust: Fast and reliable performance.
• Open Source: Available on GitHub for community contributions.
• Scalable: Easily handles increasing data loads.
• Docker Support: Simplifies deployment and scaling.

Getting Started

Prerequisites

Before you begin, ensure you have:

• A TagoIO account.
• Access to an MQTT Broker (e.g., HiveMQ, EMQX).

Installation

1. Download the Binary: Get the tagoio-relay binary from the GitHub releases page.
2. Set Permission Rights: Give the binary executable permissions:

   chmod +x tagoio-relay

3. Resolve Malicious Software Alert (macOS): Follow Apple Support instructions if you encounter a malicious software alert.
4. Verify Installation: Check if the tagoio-relay is working properly:

   ./tagoio-relay --help

Configuration

1. Create a Network in TagoIO:

   • Navigate to Integrations in your TagoIO Profile and create a new Network.
   • Enter the Middleware Endpoint for your Relay (Optional, allows publishing from TagoIO to the Relay).
   • Enable Serial and write a Payload Parser:

     // The Payload Parser runs every time a message is received from the Broker
     if (Array.isArray(payload)) {
        // Relay sends the "payload" variable by default
       const payload_received = payload.find(x => x.variable === "payload");
       // Extract the serial from the last element of the topic (e.g., /device/SERIAL)
       serial = payload_received?.metadata.topic.split("/").pop();
     }

2. Generate Network Token: Generate and save the Network Token.

3. Create a Connector: Create a Connector for your Network.

4. Generate Authorization: Navigate to Devices > Authorizations in TagoIO and generate an authorization token.

5. Create a Device: Create a Device with a Serial to use later on the Broker.

6. Set Up an MQTT Broker: Create or use a public MQTT Broker.

7. Gather Broker Details: Obtain the Address, Port, and Credentials of your MQTT Broker.

Running the Relay

1. Initialize Config File:

   ./tagoio-relay init

2. Edit Config File: Modify the generated .tagoio-mqtt-relay.toml as described in the Configuration File and Environment Variables.

3. Start the Relay:

   ./tagoio-relay start

4. Publish Messages to Broker: Publish messages to the Broker on your chosen topics and see them forwarded to your TagoIO device.

Docker Setup

To run the TagoIO MQTT Relay using Docker, use the following command:

docker run -p 3001:3001 -it --rm --name my-test tagoio/relay start --no-daemon

Specific docker documentation can be found on the Docker Hub page.

Image Variants

• tagoio/relay:latest: Main image for general use.
• tagoio/relay:: Specific version of the image.
• tagoio/relay:bookworm: Based on Debian Bookworm.
• tagoio/relay:alpine: Based on Alpine Linux.
• tagoio/relay:-: Specific version of the image for a specific distribution.

CLI Commands

The CLI has two main commands: init and start.

init

Generates the .tagoio-mqtt-relay.toml file required for setting up the Relay.

tagoio-relay init [--config-path /path/to/config]

start

Starts the MQTT Relay service.

tagoio-relay start [--verbose info,error,mqtt,network] [--config-path /path/to/.tagoio-mqtt-relay.toml]

Configuration File and Environment Variables

To configure the TagoIO MQTT Relay, you can either use environment variables or edit the .tagoio-mqtt-relay.toml file directly. Below are the available configuration parameters:

.tagoio-mqtt-relay.toml

The .tagoio-mqtt-relay.toml file generated by the init command contains the Relay parameters. By default the file is located at ~/.config/.tagoio-mqtt-relay.toml (Mac/Linux) or /root/.config/.tagoio-mqtt-relay.toml (Linux/Docker).

Here is a reference:

[relay]
network_token="Your-Network-Token"
authorization_token="Your-Authorization-Token"
tagoio_url="https://api.tago.io"

# The Relay will listen on this port for incoming messages from TagoIO 
downlink_port="3001"

[relay.mqtt]
client_id="tagoio-relay"
tls_enabled=false
address="localhost"
port=1883
subscribe=["/tago/#", "/topic/+"]
username="my-username"
password="my-password"

# TLS Certificates for the MQTT Broker (optional)
# broker_tls_ca=""
# broker_tls_cert=""
# broker_tls_key=""

Environment Variables

The environment variables can be set directly in the shell, and they will override the values provided in the .tagoio-mqtt-relay.toml file. Use it as alternative in case you don't want to use or edit the configuration file.

export TAGOIO__RELAY__NETWORK_TOKEN="Your-Network-Token"
export TAGOIO__RELAY__AUTHORIZATION_TOKEN="Your-Authorization-Token"
export TAGOIO__RELAY__TAGOIO_URL="https://api.tago.io"
export TAGOIO__RELAY__DOWNLINK_PORT="3001"

# MQTT Client Settings
export TAGOIO__RELAY__MQTT__CLIENT_ID="tagoio-relay"
export TAGOIO__RELAY__MQTT__TLS_ENABLED="false"
export TAGOIO__RELAY__MQTT__ADDRESS="localhost"
export TAGOIO__RELAY__MQTT__PORT="1883"
export TAGOIO__RELAY__MQTT__USERNAME="my-username"
export TAGOIO__RELAY__MQTT__PASSWORD="my-password"
export TAGOIO__RELAY__MQTT__BROKER_TLS_CA=""
export TAGOIO__RELAY__MQTT__BROKER_TLS_CERT=""
export TAGOIO__RELAY__MQTT__BROKER_TLS_KEY=""

# Subscribe to multiple topics
export TAGOIO__RELAY__MQTT__SUBSCRIBE=["/device/#"] 

# Change the path to the configuration file
export TAGOIO__RELAY__CONFIG_PATH="/root/.config/.tagoio-mqtt-relay.toml"

Middleware Endpoint (Optional)

The Middleware Endpoint allows the TagoIO MQTT Relay to receive messages from TagoIO through a secure TLS connection. This feature is optional but can be very useful for advanced integrations.

The Relay comes with pre-set TLS certificates configured during build time, so you don't need to set them up manually.

Setting Up the Middleware Endpoint

1. Public HTTPs Endpoint:: Ensure that you have a public HTTPs endpoint that TagoiO can reach.
2. Configure the Downlink Port: The default port for the Middleware Endpoint is 3001, but you can change this by setting the downlink_port in your (configuration file)[#configuration-file-and-environment-variables]. Repl
3. Local Testing: For local testing, you can use tools like ngrok or tailscale to expose your local server to the internet securely.

Using Ngrok:

ngrok http https://localhost:3000

Using Tailscale:

tailscale funnel 3000

4. Network Middleware Endpoint: To enable the Middleware Endpoint, you need to set the field Middleware Endpoint in your Network at TagoIO to the generated URL (e.g., https://abcd1234.ngrok.io) as your Middleware Endpoint in TagoIO.

License

The TagoIO MQTT Relay is licensed under the Apache License. See the LICENSE file for more details.

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Thank you for using TagoIO MQTT Relay! If you have any questions or need further assistance, feel free to reach out via GitHub Issues or our community forum. 🚀