DIY Chromecast with Raspberry Pi: How-To

Yes, you can turn a Raspberry Pi into a DIY Chromecast-like device by installing open-source casting software such as Plex, Kodi, or a dedicated casting receiver. You enter your Raspberry Pi’s IP address and a room name, then cast from your phone, tablet, or computer just as you would with a real Chromecast.

What a Raspberry Pi Casting Device Actually Does

A Chromecast is a small dongle that receives audio and video streams over your Wi-Fi network and plays them on your TV. A Raspberry Pi can do the same job when you install a media-center operating system that includes a casting receiver. The Pi connects to your TV via HDMI, joins your home network, and waits for casting requests from apps like YouTube, Netflix, or Plex. The main difference is that a Pi is a full computer, so it can also run other tasks, while a Chromecast is a single-purpose device.

What You Need to Build It

• A Raspberry Pi 3, 4, or 5 (the Pi 3 or newer is recommended because older models lack the processing power for smooth 1080p video)
• A microSD card (at least 8 GB, Class 10 or better)
• A power supply that meets the Pi’s requirements (5V/2.5A for Pi 3, 5V/3A for Pi 4 and 5)
• An HDMI cable to connect to your TV
• A computer to write the software image to the SD card
• Optional: a case, a microSD card reader, and a wired Ethernet adapter for more stable streaming

Software Options: Which Casting System to Install

There are several ways to turn a Pi into a casting receiver. The most popular are:

• Plex Media Server with Plex for Raspberry Pi – Plex’s official Pi image includes a casting receiver. It works with the Plex app on your phone and many other apps that support Plex casting.
• Kodi with the PlayTo add-on – Kodi is a full media center that can receive streams from DLNA and some Chromecast-compatible apps. The PlayTo add-on lets you cast from YouTube, Netflix, and other apps that use the DIAL protocol.
• Raspberry Pi OS with a casting app – You can install a lightweight casting receiver like CastReceiver or Raspicast on a standard Raspberry Pi OS, but this is less polished and requires manual configuration.
• Open Source Chromecast Alternatives – Projects like CastNow or ChromeCast on Pi exist, but they are often outdated and may not work with current streaming apps.

For most users, Plex or Kodi is the best choice because they are actively maintained and have clear setup guides.

Step-by-Step Setup Guide

1. Download the software image – Go to the Plex or Kodi website and download the Raspberry Pi image for your Pi model.
2. Write the image to the SD card – Use a tool like Balena Etcher or Raspberry Pi Imager to write the image to the SD card. This will erase all data on the card.
3. Boot the Pi – Insert the SD card into the Pi, connect the HDMI cable to your TV, and plug in the power. The Pi will boot into the media center interface.
4. Connect to Wi-Fi – In the setup wizard, select your Wi-Fi network and enter the password. If you use Ethernet, it will connect automatically.
5. Enable casting – For Plex, open the Plex app on your phone and sign in. The Pi should appear as a cast device. For Kodi, install the PlayTo add-on from the Kodi repository and enable it in the settings.
6. Test casting – Open a video in a compatible app (like YouTube or Plex) and tap the cast icon. Select the Pi from the list. The video should appear on your TV.

Common Problems and How to Fix Them

• No cast device found – Make sure the Pi and your phone/tablet are on the same Wi-Fi network. Some routers have “AP isolationâ€� enabled, which blocks device discovery. Disable that in your router settings.
• Video stutters or buffers – The Pi’s Wi-Fi may be weak. Use a wired Ethernet connection or move the Pi closer to your router. Also, close other programs on the Pi that may be using CPU.
• Casting from Netflix or YouTube doesn’t work – These apps use the DIAL protocol, which is supported by Kodi’s PlayTo add-on but not by Plex. If you need to cast from these apps, use Kodi instead.
• Audio is out of sync – This can happen with certain video formats. Try changing the audio output in the Pi’s settings from HDMI to analog, or vice versa.
• The Pi won’t boot – Re-write the image to the SD card, ensuring you use the correct image for your Pi model. Also, check that the power supply is adequate.

Comparing a Raspberry Pi to a Real Chromecast

A Raspberry Pi casting device has advantages and disadvantages compared to a Chromecast. Here’s a quick comparison:

• Cost – A Raspberry Pi plus SD card and power supply costs roughly $50–$70, while a Chromecast costs $30–$50. The Pi is slightly more expensive but can do much more.
• Performance – The Pi 4 and 5 can handle 1080p and even 4K video, but they may struggle with high-bitrate streams. A Chromecast is optimized for streaming and often handles 4K more smoothly.
• Features – The Pi can run a full media server, play local files, and even run other software. A Chromecast is limited to casting from supported apps.
• Setup complexity – A Chromecast takes minutes to set up. A Pi requires flashing an image and configuring software, which takes longer and is more technical.
• Reliability – Chromecast is a consumer product with regular updates. A Pi is a hobbyist device that may require manual updates and troubleshooting.

Costs and What to Buy

The total cost of a DIY Chromecast depends on what you already have. If you already own a Pi, you only need an SD card (about $10) and a power supply (about $15). If you’re starting from scratch, you’ll need:

• Raspberry Pi 4 (2 GB) – about $35
• MicroSD card (16 GB) – about $10
• Power supply – about $15
• HDMI cable – about $5 (if you don’t have one)
• Optional case – about $10

That’s roughly $75–$85 for a complete setup. Compare that to a Chromecast with Google TV, which costs about $50. The Pi is more expensive but offers more flexibility.

Is It Worth It?

Building a DIY Chromecast is a fun project for tech enthusiasts who want to learn about Linux, networking, and media streaming. It’s also a good way to repurpose an old Raspberry Pi. However, if you just want a simple, reliable way to cast videos to your TV, a real Chromecast is cheaper, easier, and more dependable. The Pi makes sense if you also want a media server, a retro gaming console, or a home automation hub.

Frequently Asked Questions

Can I use a Raspberry Pi as a Chromecast for Netflix?

Yes, but only with Kodi and the PlayTo add-on. Netflix uses the DIAL protocol, which Kodi supports. However, Netflix’s DRM may limit video quality to 720p on some Pi models. For the best experience, use a Pi 4 or 5 and the latest Kodi version.

Does the Raspberry Pi support 4K casting?

The Raspberry Pi 4 and 5 support 4K output, but streaming 4K content may be choppy if the network or the Pi’s CPU is overloaded. For reliable 4K, use a wired Ethernet connection and a Pi 5. Even then, some high-bitrate 4K streams may not play smoothly.

Can I cast from my iPhone to a Raspberry Pi?

Yes, but not with AirPlay. You can cast from iPhone apps that support Chromecast or DIAL, such as YouTube, Plex, and some streaming apps. For AirPlay, you would need to install a separate AirPlay receiver like RPiPlay, which is not a Chromecast replacement but adds AirPlay functionality.

What is the best Raspberry Pi model for this project?

The Raspberry Pi 4 (2 GB or 4 GB) is the sweet spot for casting. It has enough power for 1080p and most 4K streams, and it’s affordable. The Pi 5 is faster but more expensive and may be overkill. The Pi 3 works but may struggle with 1080p on some apps.

Do I need a separate remote control for the Pi?

No, you can control casting entirely from your phone or computer. The Pi itself doesn’t need a remote. If you also want to browse media on the TV, you can use a USB keyboard or a smartphone app as a remote.

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