Pi4J, the Java library to control the GPIOs of the Raspberry Pi
⚡ Executive Summary & Quick Facts
Authoritative Sourcepi4j is pi4j is an open-source project written in Java: Pi4J, the Java library to control the GPIOs of the Raspberry Pi..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), Pi4J/pi4j has accumulated 374 GitHub stars and 73 forks. It is written in Java, licensed under Apache-2.0, and ranks #14,345 globally. It is actively maintained with the latest commit recorded on Oct 19, 2026.”
| Repository | Pi4J/pi4j ↗ |
|---|---|
| Primary Category | hacktoberfest |
| Language & Stack | Java |
| Software License | Apache-2.0 |
| Community Traction | ★ 374 stars · ⑂ 73 forks · #14,345 globally |
| Maintenance | ● Active (Last commit: Oct 19, 2026) · 42 open issues |
| Target Audience | Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 88/100 · Grade AYes, pi4j is actively maintained. Continuous telemetry recorded the last code commit on Oct 19, 2026 (25 days ago). Supported by 374 stars and 73 community forks, this repository holds a calculated health index of 88/100, reflecting regular maintenance (25 days ago) and healthy issue cadence.
Star History
Add Live Star History & Verified Badges to README.md
Keep your repository README looking professional and dynamic. As our continuous crawler records new stars, these official SVG badges update in real time with zero maintenance.
Renders your high-resolution star trajectory chart right inside your GitHub README or project docs.
[](https://githubrepo.cloud/repo/Pi4J/pi4j?utm_source=readme_chart)Compact badges for your README header. Real-time stars, velocity, health audit, and rank.
[](https://githubrepo.cloud/repo/Pi4J/pi4j?utm_source=readme_badge) [](https://githubrepo.cloud/repo/Pi4J/pi4j?utm_source=readme_badge) [](https://githubrepo.cloud/repo/Pi4J/pi4j?utm_source=readme_badge) [](https://githubrepo.cloud/repo/Pi4J/pi4j?utm_source=readme_badge) [](https://githubrepo.cloud/repo/Pi4J/pi4j?utm_source=readme_badge)Momentum
+2
STARS · LAST 30 DAYS
1
PER DAY
#1,043
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +2 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +10 |
pi4j gained 2 stars in the last 30 days, about 1 a day, and now has 374. It is about 7 years old and has averaged roughly 53 stars a year. It ranks #1,043 among Java repositories and #14,345 across all languages on GitHubRepo.
Trending Record
43
DAYS ON TRENDING
#2992
BEST RANK
Sep 26, 2026
FIRST APPEARANCE
Active
STATUS TODAY
pi4j has maintained a continuous presence across global trending indexes, peaking at #2992. Below is the 30-day activity profile:
💡 Overview
pi4j is an open-source project written in Java: Pi4J, the Java library to control the GPIOs of the Raspberry Pi.
Engineered for speed, consistency, and developer ease, it solves common hurdles in hacktoberfest, java, javaonraspberrypi. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Java for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/Pi4J/pi4j.git
cd pi4j⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
pi4j coordinates its core functionality through a modular Java pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed pi4j into Java backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open Apache-2.0 license.
🚀 Getting Started
Install pi4j using your package manager: `git clone https://github.com/Pi4J/pi4j.git`
Initialize your project workspace or configuration file for pi4j.
Import pi4j into your codebase or invoke it directly from your terminal.
Execute your test suite or run `pi4j --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
Pi4J/pi4j is currently ranked #14,345 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #14,327 | danjdewhurst/story-skills | JavaScript | ★ 375 | Compare ↗ |
| #14,327 | open-wallet-standard/core | Rust | ★ 375 | Compare ↗ |
| #14,327 | Goldentrii/AgentRecall-X | JavaScript | ★ 375 | Compare ↗ |
| #14,327 | Hy4ri/hermes-mobile | Kotlin | ★ 375 | Compare ↗ |
| #14,327 | shoyrulove-dev/PureHub | Kotlin | ★ 375 | Compare ↗ |
| #14,345 | Pi4J/pi4j This Project | Java | ★ 374 | |
| #14,345 | libfirm/cparser | C | ★ 374 | Compare ↗ |
| #14,345 | arthurnn/apn_sender | Ruby | ★ 374 | Compare ↗ |
| #14,345 | twoolie/NBT | Python | ★ 374 | Compare ↗ |
| #14,345 | lostboy/workless | Ruby | ★ 374 | Compare ↗ |
| #14,345 | vcoda/magma | C++ | ★ 374 | Compare ↗ |
Frequently Asked Questions
What does pi4j do? +
Pi4J, the Java library to control the GPIOs of the Raspberry Pi
Is pi4j actively maintained in 2026? +
Yes, pi4j is actively maintained. The latest code push was recorded on Oct 19, 2026 (25 days ago). It holds a calculated Maintenance Health Score of 88/100 (A rating) with 374 stars and 42 open issues.
What language is pi4j written in? +
The primary language is Java. Topics include: hacktoberfest, java, javaonraspberrypi, pi4j, raspberrypi.
How many stars does pi4j have? +
pi4j has 374 stars and 73 forks on GitHub.
How does pi4j rank among GitHub repositories? +
With 374 stars, Pi4J/pi4j is ranked #14,345 globally across all repositories tracked on GitHubRepo and #1,043 among Java projects.
What license is pi4j distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
