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Sreethul Krishna
Sreethul Krishna

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Simplifying Dahua Biometric Integration with Python (pydahua)

#api #iot #python #showdev

If you've ever worked with Dahua biometric or access control devices, you already know the pain:

  • Complex HTTP APIs
  • Digest authentication headaches
  • Raw, unreadable responses
  • Manual pagination & parsing

I faced the same challenges while building real-world HRMS and attendance systems.
So I built something to fix it

Introducing pydahua

pydahua is a Python library that makes interacting with Dahua biometric devices simple, clean, and developer-friendly.

GitHub: https://github.com/KSreethul/pydahua

What Problems Does It Solve?

Instead of writing low-level API calls like this:

  • Constructing URLs manually
  • Handling HTTP Digest authentication
  • Parsing raw key-value responses
  • Managing logs manually

You can now do everything with simple Python methods.

Quick Example 

from pydahua import DahuaAPI

dahua = DahuaAPI(
    ip="http://192.168.1.100",
    username="admin",
    password="password"
)

# Get system info
print(dahua.get_system_info())

# Fetch attendance logs
print(dahua.fetch_attendance_logs())
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That’s it. No complexity.

Key Features

  • Built-in HTTP Digest authentication
  • Clean and structured API responses
  • User management (add, delete, fetch)
  • Access card enrollment
  • Attendance log retrieval (with parsing)
  • Device configuration support
  • Device control (reboot, shutdown)

Real-World Use Cases

I built this while working on:

  • HRMS systems
  • Attendance automation
  • Biometric integrations
  • Access control solutions

If you're building something similar, this will save you hours (or days).

Example: Fetch Attendance Logs 

from datetime import datetime

logs = dahua.get_control_card_rec(
    card_no="123456",
    start_time=datetime(2025, 1, 1, 0, 0, 0),
    end_time=datetime(2025, 1, 18, 23, 59, 59)
)

print(logs)
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Output (clean & structured) 

{
  "records": [
    {
      "card_no": "123456",
      "card_name": "John Doe",
      "attendance_state": "CheckIn",
      "door": "1",
      "create_time": "2025-01-18T09:12:33"
    }
  ],
  "count": 1
}
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Why I Built This

Most biometric SDKs are:

  • Either poorly documented
  • Or locked behind enterprise systems

I wanted a simple, open-source solution that developers can plug into any system.

Installation 

pip install pydahua
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Supported Devices

Works with Dahua devices that support:

  • magicBox.cgi
  • configManager.cgi
  • userManager.cgi
  • recordFinder.cgi

Open Source — Contributions Welcome

If you're working with biometric systems, I'd love your feedback.

  • Found a bug? Open an issue
  • Need a feature? Suggest it
  • Want to contribute? PRs are welcome

Final Thoughts

If you're building:

  • HR software
  • Attendance systems
  • Access control tools

pydahua can save you a lot of time and frustration.

Give it a try and let me know what you think

Links

If you found this useful, consider starring the repo — it really helps!

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