🔌 SerialLink

A cross-platform serial port management service with gRPC API

SerialLink runs as a background service, managing serial port connections on Windows, Linux, and Raspberry Pi. It exposes a high-performance gRPC API so any language—Python, C#, Node.js, Go—can talk to your hardware over the network.

Your App (any language)  ──gRPC──▶  SerialLink  ──USB/UART──▶  Hardware

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✨ Why SerialLink?

Problem	SerialLink Solution
Port locked to one process	🔒 Session locks + clean handoffs
Different APIs per language/platform	⚡ One gRPC API, works everywhere
No remote access to serial devices	🌐 Network-accessible serial ports
Complex port configuration	🛠️ Simple CLI + YAML config

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🚀 Quick Start

# Install
go install github.com/Shoaibashk/SerialLink@latest

# Scan for ports
seriallink scan

# Start the server
seriallink serve

# In another terminal: open a port
seriallink open COM1 --baud 115200

That's it. Your serial port is now accessible via gRPC at localhost:50051.

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📦 Installation

Go Install (recommended)

go install github.com/Shoaibashk/SerialLink@latest

Build from Source

git clone https://github.com/Shoaibashk/SerialLink.git
cd SerialLink && make build

Download Binary

Releases

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🛠️ CLI Reference

Command	Description
seriallink serve	Start the gRPC server
seriallink scan	List available serial ports
seriallink open <port>	Open a port with config
seriallink close <port>	Close and release a port
seriallink read <port>	Read data from port
seriallink write <port> <data>	Write data to port
seriallink config <port>	View/modify port settings
seriallink status <port>	Get port statistics
seriallink info	Service information
seriallink version	Version info

Common Examples

# Start server with custom address
seriallink serve --address 0.0.0.0:50052

# Scan with JSON output (great for scripts)
seriallink scan --json

# Open with full config
seriallink open /dev/ttyUSB0 --baud 115200 --data-bits 8 --parity none

# Read with timeout
seriallink read COM1 --timeout 5000 --format hex

# Write hex data
seriallink write COM1 --hex "48454C4C4F"

💡 Tip: Set SERIALLINK_ADDRESS env var to skip --address on every command.

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🌐 gRPC API

Connect from any language:

# Python
import grpc
channel = grpc.insecure_channel('localhost:50051')
stub = SerialServiceStub(channel)
ports = stub.ListPorts(ListPortsRequest())

// Node.js
const client = new SerialService('localhost:50051', grpc.credentials.createInsecure());
client.ListPorts({}, (err, response) => console.log(response.ports));

// C#
var channel = GrpcChannel.ForAddress("http://localhost:50051");
var client = new SerialService.SerialServiceClient(channel);
var ports = await client.ListPortsAsync(new ListPortsRequest());

Key Methods:

• ListPorts
• OpenPort
• ClosePort
• Read
• Write
• StreamRead
• BiDirectionalStream

📖 Full API docs: docs/API.md

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⚙️ Configuration

# ~/.seriallink/config.yaml
server:
  grpc_address: "0.0.0.0:50051"

serial:
  defaults:
    baud_rate: 9600
    data_bits: 8
    parity: "none"

logging:
  level: "info"    # debug | info | warn | error

Config locations: ~/.seriallink/config.yaml → ./config.yaml → /etc/seriallink/config.yaml

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📚 Documentation

Doc	Description
API Reference	gRPC methods, client examples, error codes
Deployment Guide	systemd, Windows service, Docker, TLS
Development Guide	Building, architecture, contributing

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🤝 Contributing

We welcome contributions! Here's how to get started:

# Clone and build
git clone https://github.com/Shoaibashk/SerialLink.git
cd SerialLink
make build

# Run checks before submitting
make ci

Ways to contribute:

• 🐛 Report bugs via Issues
• 💡 Suggest features
• 📖 Improve documentation
• 🔧 Submit pull requests

See docs/DEVELOPMENT.md for detailed setup.

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📄 License

Apache License 2.0 — use it freely in personal and commercial projects.

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Made with ❤️ by Shoaibashk for hardware hackers, IoT builders, and serial port wranglers.

⭐ Star us on GitHub