⚙️📡 Quick Summary
Old Samsung phones can be exploited as effective alternatives to single-board computers like Raspberry Pi in many computer engineering projects.
These phones are equipped with advanced processors, storage capabilities, and customizable operating systems, making them suitable for applications such as running network servers, controlling smart devices, and managing 3D printers, in addition to creating game units or small network storage.
In this article, we highlight five innovative technical applications that aim to take advantage of old phones and replace Raspberry Pi by enabling them to provide practical and economical solutions.
⚙️📡 5 Ways to Replace an Old Samsung Phone with Raspberry Pi
🧠 1. Turning the phone into a network ad-blocking server
One of the most popular uses of Raspberry Pi is running systems such as Pi-hole, which act as DNS servers to block ads and web trackers. This role can be replicated on an old Samsung phone by installing a phone-specific Linux distribution such as postmarketOS.
Once the phone is set up as a Linux system, programs like AdGuard Home can be run on the phone architecture, which includes a relatively powerful SoC, enabling the phone to perform blocking tasks for the entire home network, while ensuring continuous operation thanks to the built-in battery.
🔌 2. Making the phone a smart home control center
The capabilities of old phones can be used to run programs like Home Assistant, which is used to control the Internet of Things (IoT) and smart home devices.
By using applications like Termux that provide a terminal interface on Android phones, Home Assistant can be installed without needing a separate Raspberry Pi device. This method is suitable for computer engineering and embedded systems enthusiasts who are looking for lower costs and efficient use of hardware.
Although some limitations may be imposed by Android systems, such as background app stoppage, this solution proves its value, especially in small home environments.
🎛️ 3. Remote control of 3D printers
Raspberry Pi is considered a popular device for running programs like OctoPrint that allow managing 3D printers over the internet.
This function can be implemented without Raspberry Pi by using an old Samsung phone and Android system, through the Octo4a app, which provides an Android-running version of OctoPrint.
The app supports connecting the phone to the printer via USB On-The-Go (USB OTG), and the phone camera can also be used for monitoring and recording during printing, which is attractive to 3D printing and embedded systems enthusiasts.
🎮 4. Creating a Retro Gaming Console
Projects such as RetroPie on Raspberry Pi are known for reviving classic video games through emulators (emulation).
An old Samsung device can also be turned into a similar gaming unit by running RetroArch on Android.
Thanks to modern phone support for USB-C connections and HDMI output, games can be displayed on external screens and controllers such as PlayStation DualSense can be used to manage gameplay, making the phone an integrated platform for classic gaming without the need for Raspberry Pi.
📡 5. Using the phone as a small NAS network storage device
Old Samsung phones can be set up as file servers (NAS) by running sharing protocols such as Samba under Linux or Android environments.
Using this method, the phone allows sharing internal storage or a microSD card with other devices on the home network, and this feature is used in several engineering solutions to provide low-cost network storage.
The major advantage is the phone retaining power thanks to the battery, which makes the file storage system equipped with built-in power protection similar to the UPS feature, which usually requires additional devices with Raspberry Pi.
🧩 Engineering Analysis: How does an old phone stand in for Raspberry Pi?
The main difference lies in the architecture of the processor in phones compared with single-board computers. Samsung phones usually use advanced multi-core ARM processors, which are very similar to those used in Raspberry Pi.
Although Raspberry Pi is designed to be a model platform for educational teams and hobbyists, old phones may offer the same capabilities or more thanks to their powerful processors, large memory, and integrated operating system.
And with open-source operating systems and applications designed for mobile computing, the possibilities for phones to manage multitasking increase, making them closer to advanced embedded systems within the scope of computer engineering.
Possible technical challenges:
- Power management: the phone is not designed to operate continuously as a server, despite having a battery.
- Software compatibility: some distributions or applications may need modifications to suit the system architecture.
- Peripheral support: not all phone models support USB OTG or continuous connection while charging the battery.
Future development opportunities 🔍
- Employing artificial intelligence on hardware (AI Accelerators) present in old phone processors to perform advanced computing tasks.
- Developing lightweight Linux systems tailored for phones to enhance their use in embedded systems projects.
- Exploiting the advanced wireless connectivity interfaces in phones such as 5G and Wi-Fi 6 to enhance IoT applications.
In conclusion
An old Samsung smartphone is not just a neglected device; it can become an integrated platform that enables engineers and hobbyists alike to carry out diverse projects that would usually require devices such as Raspberry Pi.
These alternatives show the development of hardware engineering in a way that allows computing resources to be reused within devices that are already available, while reducing costs and enhancing the sustainability of use.
For those interested in computer engineering, this trend is an opportunity to gain a deeper understanding of how processors and embedded systems are integrated within diverse architectural structures in ways that serve the goals of high-performance computing and hardware security.
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