onoff
GPIO access and interrupt detection library for Node.js.
Pricing
Free tier
Flat rate
Adoption
↘CoolingLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is onoff?
Onoff is a GPIO access and interrupt detection library for Node.js that allows developers to interact with hardware through the General Purpose Input/Output interface. It's essential for projects involving embedded systems, IoT devices, or any application requiring direct hardware interaction via GPIO pins.
Key differentiator
“Onoff stands out as a specialized library for GPIO and interrupt handling in Node.js, offering precise control over hardware interfaces which is crucial for embedded systems and IoT projects.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
The official documentation lacks detailed explanations and use cases, making it difficult for new users to understand how to implement features effectively.
Setting up the environment requires a deep understanding of Node.js and GPIO configurations, which can be challenging for developers without prior experience in hardware interaction.
Running Onoff on single-board computers with limited processing power or memory can lead to performance bottlenecks and instability, affecting real-time applications.
While it supports various Raspberry Pi models, the library has limited compatibility with other single-board computers or custom hardware setups, restricting its use in diverse IoT projects.
Fit analysis
Who is it for?
✓ Best for
Developers working on Raspberry Pi projects who need precise GPIO control and interrupt handling
IoT developers requiring a robust library for hardware interaction in Node.js applications
Embedded systems engineers looking to integrate software with hardware using Node.js
✕ Not a fit for
Projects that require cloud-based services or do not involve direct hardware interaction
Applications where the primary focus is on front-end development without any need for GPIO access
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
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Next step
Get Started with onoff
Step-by-step setup guide with code examples and common gotchas.