# Ninniku IT Hub

> Taiwan's leading iDempiere ERP consultancy. Open-source ERP solutions, IoT integration, and technical training since 2018.

Ninniku IT Hub specializes in iDempiere ERP implementation, customization, and training. We provide hands-on technical guides covering ERP architecture, OSGi plugin development, REST API integration, IoT/Arduino connectivity, and Linux server administration.

Content is available in Traditional Chinese (default), English (?lang=en), and Japanese (?lang=ja). Add `?lang=en` or `?lang=ja` to any URL for translated content.

## Expertise

- **iDempiere ERP**: Implementation, customization, OSGi plugins, JasperReports, workflow engine, financial management
- **IoT Integration**: Arduino, Raspberry Pi, sensor connectivity with ERP systems
- **Linux Administration**: Ubuntu server, Nginx, PostgreSQL, system hardening
- **Technical Training**: ERP consultant certification courses, hands-on tutorials

## Key Pages

- [iDempiere ERP Consultant Training](https://www.ninniku.tw/course/)
- [Arduino IoT & ERP Integration Course](https://www.ninniku.tw/arduino-for-iot-and-erp-integration/)
- [ERP Consultant Certification](https://www.ninniku.tw/certificate-of-erp-consultant/)
- [Technical Support](https://www.ninniku.tw/support/)
- [Plug-ins (Taiwan)](https://www.ninniku.tw/plugins/)

## iDempiere ERP Articles

- [iDempiere Learn: 47 Free Lessons](https://www.ninniku.tw/idempiere-learn-47-free-lessons/)
- [How to Add Custom Toolbar Buttons](https://www.ninniku.tw/idempiere-technical-guide-how-to-add-custom-toolbar-buttons/)
- [Real-Time Updates with OSGi EventAdmin](https://www.ninniku.tw/idempiere-technical-achieving-sub-second-real-time-updates-with-osgi-eventadmin/)
- [REST API Integration Guide](https://www.ninniku.tw/integrating-rest-api-with-idempiere-12-a-comprehensive-installation-guide/)
- [ZK Web Push: Community vs Enterprise](https://www.ninniku.tw/zk-framework-web-push-community-vs-enterprise-edition/)
- [Dashboard Gadgets Implementation](https://www.ninniku.tw/tech-blog-post-mastering-idempiere-dashboard-gadgets-implementation/)
- [iDempiere as Systemd Service](https://www.ninniku.tw/ensuring-erp-high-availability-setting-up-idempiere-as-a-systemd-service-on-ubuntu/)
- [E-Invoice Integration Guide](https://www.ninniku.tw/idempiere-einvoice-implementation/)
- [MVC to MVVM Integration](https://www.ninniku.tw/bridging-the-divide-integrating-idempiere-mvc-components-into-zk-mvvm-using-injection/)
- [OSGi Service Ranking Guide](https://www.ninniku.tw/demystifying-osgi-service-ranking-a-comprehensive-guide/)
- [Fragment Plugins in OSGi](https://www.ninniku.tw/introduction-to-fragment-plugins-in-osgi-enhancing-web-resources/)
- [JasperReports Subreports & Images](https://www.ninniku.tw/mastering-jasperreports-in-idempiere-subreports-and-dynamic-images/)
- [Handling Bad Debts in iDempiere](https://www.ninniku.tw/how-to-handle-bad-debts-in-idempiere-erp-a-step-by-step-guide-for-writing-off-receivables-and-maintaining-accurate-financial-records/)
- [Period Control for Complex Workflows](https://www.ninniku.tw/managing-transactions-across-periods-in-idempiere-erp-a-guide-to-period-control-for-complex-workflows/)
- [iDempiere vs SAP Comparison](https://www.ninniku.tw/how-to-decide-between-sap-and-idempiere/)
- [iDempiere vs Odoo Comparison](https://www.ninniku.tw/compare-idempiere-odd/)
- [Is iDempiere Good for Small Business?](https://www.ninniku.tw/is-idempiere-erp-a-good-option-for-small-businesses/)
- [Install iDempiere on Raspberry Pi](https://www.ninniku.tw/how-to-install-idempiere-erp-on-your-raspberry-pi/)
- [Profit Center Systems](https://www.ninniku.tw/boosting-your-bottom-line-how-idempiere-erp-enables-practical-profit-center-systems/)
- [CRM Implementation Guide](https://www.ninniku.tw/boost-your-business-with-idempiere-a-step-by-step-guide-to-implementing-crm-functionality/)

## IoT & Arduino Articles

- [Getting Started with Arduino](https://www.ninniku.tw/getting-started-with-arduino-lighting-up-an-led/)
- [Understanding Floating State](https://www.ninniku.tw/understanding-floating-state-in-arduino/)
- [PWM Breathing Effect](https://www.ninniku.tw/arduino-tutorial-control-led-brightness-with-pwm-for-breathing-effect/)
- [Potentiometer LED Control](https://www.ninniku.tw/shine-bright-with-potentiometer-controlling-led-brightness-with-pwm-on-arduino/)
- [Arduino vs Raspberry Pi](https://www.ninniku.tw/difference-between-arduino-and-raspberry-pi/)
- [WordPress on Raspberry Pi](https://www.ninniku.tw/how-to-install-wordpress-on-your-raspberry-pi/)

## Linux & DevOps Articles

- [Nginx DDoS Defense Guide](https://www.ninniku.tw/nginx-7-moves-ddos-defense/)
- [GitHub Fork Guide](https://www.ninniku.tw/github-fork-guide-six-moves/)
- [PostgreSQL Streaming Replication](https://www.ninniku.tw/master-the-flow-setting-up-postgresql-15-streaming-replication/)
- [Nginx Load Balancing](https://www.ninniku.tw/nginx-load-balancing-scaling-your-application-with-multiple-backend-servers/)
- [Self-Hosting n8n on Raspberry Pi](https://www.ninniku.tw/self-hosting-n8n-on-raspberry-pi-5-with-an-external-nginx-reverse-proxy/)
- [PostgreSQL Upgrade 9.6 to 14](https://www.ninniku.tw/postgresql-time-travel-upgrading-from-version-9-6-to-14/)

## Categories

- [iDempiere](https://www.ninniku.tw/category/idempiere/) -- 50+ articles on ERP development and customization
- [IoT](https://www.ninniku.tw/category/iot/) -- Arduino, Raspberry Pi, hardware projects
- [Linux](https://www.ninniku.tw/category/linux/) -- Server administration, security, DevOps
- [IT Tools](https://www.ninniku.tw/category/it-tools/) -- PostgreSQL, Docker, Java, Git

## Optional

- [Sitemap](https://www.ninniku.tw/sitemap_index.xml)
- [Full content index for LLMs](https://www.ninniku.tw/llms-full.txt)