TRMNL BYOS (PHP/Laravel)

TRMNL BYOS Laravel is a self-hostable implementation of a TRMNL server, built with Laravel. It enables you to manage TRMNL devices, generate screens dynamically, and can act as a proxy for the native cloud service (native plugins, recipes).

If you are looking for a Laravel package designed to streamline the development of both public and private TRMNL plugins, check out bnussbau/trmnl-laravel.

• 👉 more Screenshots

Key Features

• 📡 Device Information – Display battery status, WiFi strength, firmware version, and more.
• 🔍 Auto-Join – Automatically detects and adds devices from your local network.
• 🖥️ Screen Generation – Supports Plugins, Recipes, API, Markup, or updates via Code.
  • Supported Devices / Apps: TRMNL, ESP32 with TRMNL firmware, trmnl-android, trmnl-kindle, …
• 🔄 TRMNL API Proxy – Can act as a proxy for the native cloud service (requires TRMNL Developer Edition).
  • This enables a hybrid setup – for example, you can update your custom Train Monitor every 5 minutes in the morning, while displaying native TRMNL plugins throughout the day.
• 🌙 Dark Mode – Switch between light and dark mode.
• 🐳 Deployment – Dockerized setup for easier hosting (Dockerfile, docker-compose).
• 🛠️ Devcontainer support for easier development.

🎯 Target Audience

This project is for developers who are looking for a self-hosted server for devices running the TRMNL firmware. It serves as a starter kit, giving you the flexibility to build and extend it however you like.

Support ❤️

This repo is maintained voluntarily by @bnussbau.

Support the development of this package by purchasing a TRMNL device through the referral link: https://usetrmnl.com/?ref=laravel-trmnl. At checkout, use the code laravel-trmnl to receive a $15 discount on your purchase.

or

Hosting

Run everywhere, where Docker is supported: Raspberry Pi, VPS, NAS, Container Cloud Service (Cloud Run, ...)

Docker Compose file located at: docker/prod/docker-compose.yml.

For production use, generate a new APP_KEY and set the environment variable APP_KEY=. For personal use, you can disable registration (see section Environment Variables).

Laravel Forge, or bare metal PHP server with Nginx or Apache is also supported.

Requirements

• PHP >= 8.2
• ext-imagick
• puppeteer see Browsershot docs

Local Development

see docs/DEVELOPMENT.md

Demo Plugins

Run the ExampleRecipesSeeder to seed the database with example plugins:

php artisan db:seed --class=ExampleRecipesSeeder

• Zen Quotes
• This Day in History
• Weather
• Train Departure Monitor
• Home Assistant
• Sunrise/Sunset

Usage

Environment Variables

Environment Variable	Description	Default
TRMNL_PROXY_BASE_URL	Base URL of the native TRMNL service	https://trmnl.app
TRMNL_PROXY_REFRESH_MINUTES	How often should the server fetch new images from native service	15
REGISTRATION_ENABLED	Allow user registration via Webinterface	1
FORCE_HTTPS	If your server handles SSL termination, enforce HTTPS.	0
PHP_OPCACHE_ENABLE	Enable PHP Opcache	0
TRMNL_IMAGE_URL_TIMEOUT	How long TRMNL waits for a response on the display endpoint. (sec)	30

Login

If your environment is local, you can access the server at http://localhost:4567 and login with user / password admin@example.com / admin@example.com, otherwise register. With environment variable REGISTRATION_ENABLED you can control, if registration is allowed.

➕ Add Your TRMNL Device

Auto-Join (Local Network)

1. Switch on the “Permit Auto-Join” toggle in the header. For that to work only one user can be registered.
2. New devices on your local network will be detected and added automatically when connecting to the server.

✅ This is the easiest way to connect your devices with minimal effort.

Manually

1. Open the Devices page: 👉 http://localhost:4567/devices
2. Click “Add New Device”.
3. Retrieve your TRMNL MAC Address and API Key:

• You can grab the TRMNL Mac Address and API Key from the TRMNL Dashboard
• Alternatively, debug incoming requests to /api/setup to determine them

⚙️ Configure Server for Device

📌 Firmware Version 1.4.6 or Newer

• Setup device
• After entering Wifi credentials, choose "Custom Server"
• Point to the URL of your server

Firmware Older Than 1.4.6

If your device firmware is older than 1.4.6, you need to flash a new firmware version to point it to your server.

See this YouTube guide: https://www.youtube.com/watch?v=3xehPW-PCOM

☁️ Activate fresh TRMNL Device with Cloud Proxy

1. Setup the TRMNL as in the official docs with the cloud service (connect one of the plugins to later verify it works)
2. Setup Laravel BYOS, create a user and login
3. In Laravel BYOS in the header bar, activate the toggle "Permit Auto-Join"
4. Press and hold the button on the back of your TRMNL for 5 seconds to reactivate the captive portal (or reflash).
5. Go through the setup process again, in the screen where you provide the Wi-Fi credentials there is also option to set the Server URL. Use the local address of your Laravel BYOS
6. The device should automatically appear in the device list; you can deactivate the "Permit Auto-Join" toggle again.
7. In the devices list, activate the toggle "☁️ Proxy" for your device. (Make sure that the queue worker is active. In the docker image it should be running automatically.)
8. As long as no Laravel BYOS plugin is scheduled, the device will show your cloud plugins.

Troubleshooting

Make sure that your device has a Developer license, you should be able to verify by calling the https://trmnl.app/api/display endpoint.

• https://docs.usetrmnl.com/go/private-api/introduction
• https://docs.usetrmnl.com/go/private-api/fetch-screen-content

🖥️ Generate Screens

Markup via Web Interface

1. Navigate to Plugins > Markup in the Web Interface.
2. Enter your markup manually or select from the available templates.
3. Save and apply the changes.

• Available Blade Components are listed here: laravel-trmnl | Blade Components

🎨 Blade View

• Edit resources/views/trmnl.blade.php
  • Available Blade Components are listed here: laravel-trmnl | Blade Components
• To generate the screen, run

php artisan trmnl:screen:generate

Generate via API

You can dynamically update screens by sending a POST request.

• Send a POST request to /api/screen with the following payload

Header

Authorization Bearer <TOKEN>

Body

{
    "markup": "<h1>Hello World</h1>"
}

🤝 Contribution

Contributions are welcome! See CONTRIBUTING.md for details.

License

MIT