Platforms:

• Bare-metal
• FreeRTOS
• Embedded Linux
• Mbed OS/compiler

Parts last used:

• ESP32 (w/ESP-IDF)
• u-blox ODIN-W2
• u-blox NINA-B1
• Nordic-nRF
• PIC10-32
• ATtiny
• i.MX 6
• NVIDIA TX1/TX2/Nano
• TMS320
• MSP430
• STM32
• Multitech mDot

Peripherals:

• Sensors and actuators
• Smart home radios
• Flash/EEPROM
• Cell modems (Linux and bare-metal interfaces)
• Analog to digital converters (ADC)
• PWM controllers
• Charge controllers (TI-BQ)
• Fuel gauges (TI-BQ)
• Serial communication controllers
• EMIF for RAM/FLASH/FPGA/CPLD interfaces
• Network co-processors (u-blox and ESP32 AT)

Protocols:

• TCP/IP (including packet capture)
• SPI/I2C/UART/custom
• JTAG/SWD
• BLE (Dev with Bluedroid/Nordic/some BlueZ)
• HTTP(S)
• MQTT
• LoRa (extensive)
• Zigbee
• Zwave
• AT-comand/parser
• Nordic DFU transport
• Modbus
• Proprietary framing protocols (using HDLC, and custom)

Software modules:

• Drivers
• Display stacks (u8g2, etc..)
• Bootloader (single and multi-stage)
• Application
• Connected and OTA upgrade
• System/program monitor
• System provisioners
• Protocol parsers

Linux-specific knowledge:

• U-Boot source and boot scripting (.scr/extlinux)
• Kernel compilation/patching
• Logging
• Init/Systemd
• CMake/Make/GCC
• Peripheral communication (SPI/I2C/etc...)
• C POSIX libraries
• System monitoring
• Process resource monitoring
• Partition and disk/image management
• Secure data encryption/handling

Electronics:

• Digital and Analog circuit design/review/debug
• RF design
• CPU/controller/SoC selection & connectivity
• Analog and Digital PCB design:
• Sensor interface and signal chain design
• Multi-layer PCB and flex design
• Design for signal integrity/DFM/DFT
• Solving EMC/EMI problems
• Regulatory design reviews, i.e. UL, FCC, CSA
• Power supply design, switch mode and HV
• Design for low-power and battery-powered devices

Languages:

• C/C++
• Bash
• Various ASM
• Python

Commercial software dev tools:

• STM32Cube IDE
• IAR Embedded Workbench
• Rowley CrossWorks (MSP430 and ARM)
• Atmel Start + Atmel Studio
• TI Code Composer Studio (CCS)
• Keil µVision
• Mbed online and Mbed Studio

VM/container:

• VMware
• VirtualBox
• Vagrant
• Docker

Hardware dev tools + related:

• Oscilloscope
• Joulescope (favorite tool!)
• Current probes
• Function generator
• Logic and protocol analyzer (Saleae/USBEE)
• Soldering/prototyping
• Enclosure and potting

Recent roles held for clients:

• Senior embedded hardware/software consultant
• Software due dilligence for aquisitions