Dave Rensberger Email & Phone Number

Arlington, MA, US

Milton, MA, US

• [summer 2023 - present] Working with the Zephyr OS, including writing a WiFi driver for the RPi Pico W and leading an online "Tech Talk" about using MicroROS with Zephyr[early 2020 - mid 2023] Firmware lead for design.
• Yocto Linux build system setup and kernel and user-space configuration
• Bluetooth GATT server for Wi-Fi interface setup from Android/iOS app
• Cloud OTA (over-the-air) firmware updates based on Mender and AWS-IoT
• Development of a dual image bank boot system so that firmware updates will automatically be rolled back in the event of failure
• Integration encrypted firmware and secure boot system, leveraging our SoC vendor's co-processor

• One of the first four embedded software engineers at the iteration of Ambient that had re-tooled to focus on smart-grid opportunities. I built the embedded software that is still at the core of Ambient's flagship.
• Set up the build environment (toolchain, Linux kernel, root filesystem image, and applications)
• Worked on the Linux portion of board bring-up for PowerPC based hardware, as well as for hardware based on an Altera FPGA based “system on programmable chip” with a Nios2 “soft core” as CPU. This was one of the first.
• Designed and implemented a framework that provides a common interface into different modem vendors’ software development kits.
• Developed user privilege model for product.
• Developed data collectors for several meter reading devices and GPS location tracking devices.

• One contract involved porting Linux to a new system-on-chip architecture (ARM-926EJ-S core).
• The other contract involved updating a Java/Swing UI application.

• I was the engineer responsible for developing and maintaining the embedded Linux distributions and network code that are used on the company’s network-enabled UHF EPC RFID readers. I also did some UI work and acted as.
• Built and maintained the Linux distribution and performed board bring-ups for Intel Xscale and ADI Blackfin based boards. Customized the RedBoot and u-boot boot-loaders.
• Led a project to design and implement a graphical application to interface with embedded RFID readers. This application still ships with the company’s embedded RFID reader development kits.
• Added new features related to product’s multi-protocol scheduling and RF interference mitigation.
• Instructed training courses about writing software that uses the device’s API.
• Acted as release engineer for product firmware releases.

Marlborough, MA, US

• A variety of software/firmware engineering roles in a number of different business units and product lines including VoIP telephones, carrier-class VoIP gateways, and enterprise switches and routers.
• Board bring-up, VxWorks and Linux boot code, and diagnostics code (manufacturing diagnostics, DVT, and POST) for a variety of different carrier-class and enterprise datacom and IP telephony products.
• Designed and implemented lots of network and platform features.
• As 3Com headed into it's joint venture with Huawei, I Integrated firmware on-site in China and England on a development project that truly spanned the globe.
• Designed and specified a network management user interface that was implemented by our Chinese partner.

Arlington, VA, US

• Designed, developed, and coded real-time application level software for air traffic management systems.
• Instructed customer training courses about code maintenance and debugging.

San Jose, California, US

Supported wind-tunnel data acquisition systems and software.

Bachelor'S Degree, Computer Science

Computer Systems Networking And Telecommunications