About

codedosa logo

What’s Codedosa(codedosa.com)?

  • I created this blog to share insights on software development and open-source technology.
  • I hope this site provides valuable resources to everyone who visits.
  • I am deeply committed to the ethos of open source.

About Me(Career)

  • 2007~2009 Network device/equipment hardware engineer based on Linux
  • 2009~Now Network device/equipment software developer based on Embedded Linux

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Work Experience

Networking & Security System Development

  • Network Security Appliance Development & Maintenance: Extensive experience with x86 architecture and Linux-based systems.
  • 10G Network Interface Card (NIC) Development: Designed and implemented Linux-based high-speed network drivers.
  • Network Packet Drop Prevention & Monitoring Systems: Developed firmware and software utilizing Xilinx FPGA.
  • IP-PBX & VoIP Server Development: Built and maintained SIP-based VoIP systems using the Asterisk framework.
  • Mobile Push Notification Daemon Development: Built high-performance background message servers on Linux platforms.
  • Network Tools Development: Created various custom Linux-based network utilities and diagnostics tools.

Wireless, IoT & Embedded Systems

  • Cellular Router & CPE Software Development: Developed and maintained software for WiMAX, LTE, and 5G Router/CPE devices.
  • LTE IoT Terminal Software Development: Experienced in building application firmware for IoT devices.
  • Embedded Linux SDK Development: Proficient in building custom OS images using OpenWRT, Buildroot, and Yocto Project.
  • Wireless Connectivity Integration: Ported WiFi/Bluetooth drivers and developed AP/Client functionalities (Realtek, Marvell, etc.).
  • Bluetooth Stack Porting: Ported the Open Source BlueZ stack onto embedded Linux devices and implemented Bluetooth communication protocols.
  • Modem Communication Interface: Developed modem-to-host interface layers using Qualcomm QMI messages.
  • Firmware OTA (Over-The-Air): Designed and deployed secure remote firmware update functionalities.

Low-Level Kernel & Hardware Integration

  • Peripheral Driver Porting: Extensive experience porting various kernel drivers for embedded Linux peripherals (Modem, Ethernet, Sensors, Flash, ADC, WiFi, Bluetooth).
  • Bootloader Customization: Experienced in U-Boot custom configuration and board brings-up.
  • Open Source Hardware Prototyping: Wealth of experience with maker platforms including Arduino, Raspberry Pi, and BeagleBone Black.
  • Custom OS Porting on Hardware: Successfully ported OpenWRT and Buildroot onto Raspberry Pi, and uClinux onto STM32 microcontrollers.

Cloud & IoT Integration

  • AWS Cloud Integration: Developed Linux application clients interacting with AWS S3.
  • AWS IoT SDK Integration: Built secure machine-to-machine telemetry using MQTT protocol via AWS IoT SDK.

Core Programming Languages

  • Languages: C, C++, Python, Shell Script (Bash), PHP

Site Owner’s Interests

  • Linux-Based Systems
  • Embedded Linux Systems
  • Advanced IoT & Hardware Ecosystems: IoT devices, network appliances, ultra-low-power systems, drones, wireless communication systems, and aerospace/aviation systems
  • Open Source Strategy: Open-source development and the strategic/effective utilization of open-source software
  • Cybersecurity & Hacking (Hacking)
  • Tech for Good: Any innovative IT technologies contributing to the betterment of humanity

Contact Me