Developed an SDK for ACS for a family of devices based on ESP32-S3/ESP32-C3 microcontrollers in C language using RTOS.Created the SDK architecture, interfaces and implementation.Created a build system based on CMake.Added Doxygen documentation.The main microcontroller peripherals used: RS485/CAN/WiFi/Ethernet.Added firmware protection: Secure Boot, Flash Encryption.Conducted unit and integration testing on the device (Unity/CMock), added code coverage checking (gcov).Developed a stand for automated functional and acceptance testing of devices using Python.Collaborate on git (Bitbucket).Made a cloud build of the firmware in the Docker environment using Bitbucket Pipelines.

Developed a BLE 5 battery powered cargo tracking device based on ESP32-C3 microcontroller in C language using RTOS.Developed architecture (UML), interfaces and cross-platform implementation.Created a build system based on CMake, added Doxygen documentation.Made unit testing in CTest using Unity/CMockAdded test applications in Python.Used git.Added cloud build of firmware in Docker environment using Github Actions.Initiated and supported the transition to Jira for firmware developers: task management, priorities, deadlines, code review, documentation in Confluence.Reverse engineering and documentation of the legacy communication protocol.Bugfix, development of new functionality for released devices based on ESP32 and nRF52833 MCUs.

Developed baremetal firmware for photo flash based on EFR32BG13, EFR32BG22 microcontrollers in C and C++.Created a cross-platform build based on CMake and GCC (the legacy build system was completely rewritten)Created a software update architecture for 2 microcontrollers and integrated bootloaders.Created test applications in Python.Used the following peripherals UART, I2C, SPI, BLE.Worked in a distributed team: Jira, Git, Jenkins, Code review, remote debugging.I used the following tools for working/debugging HW: oscilloscope, multimeter, soldering iron.Initiated and conducted workshops for developers on using CMake and tools from Segger.Fixed bugs for released devices based on the STM32F4 microcontroller.

Worked on firmware for IoT devices with WiFi/BLE in C language with RTOS based on Qualcomm QCA4020 and NXP 88MW320 microcontrollers using GCC and Make/CMake.Worked in a distributed team: Jira, Bitbucket, code review, legacy code refactoring, team support (QA, mobile).Used the following debugging tools: Wireshark (MQTT, HTTPS), Nordic Semi tools (BLE), Segger J-Link, RTT and Ozone.Completely reworked the legacy make build system into a cross-platform solution based on CMake.Ported and configured libraries (LwIP, mbedTLS, FreeRTOS) for cross-platform build and execution.Worked on the architecture of the HAL and OSAL levels for further devices in the line.Created code development requirements and tracked implementation by other developers.Implemented code review, modular code structure, testing on host/target platforms.Added Doxygen code documentationImproved the quality of the code base (reducing bugs in production, reducing warnings during build).Initiated the transition to team development and discussion of solutions.Interviewed new developers (technical), created test tasks, checked solutions, and gave detailed feedback to candidates. Onboarded and set tasks for new employees.

Developed firmware for IoT devices (thermostats, interface gateways) in C language for microcontrollers PIC16/18, STM8, STM32, ESP8266 and ESP32.Created drivers: displays, modems (SIM800, BGS2, N10, N21), sensors using main peripherals (UART, GPIO, SPI, I2C, Timers, DMA, PWM, ADC, DAC)Ported libraries, created libraries for working with M-Bus, eBus and Opentherm interfaces, bugfixed legacy code.Used tools for working/debugging HW: oscilloscope, logic analyzer, multimeter, soldering iron.Used tools for software debugging: Wireshark, Nordic Semi tools (BLE), Postman.Integrated devices into third-party automation environments: Fibaro, Wiren Board, Raspberry Pi.Developed test boards for devices in P-CAD 2006: electrical circuits, board routing, soldering and debugging samples.

Developed firmware for devices (temperature control devices in industrial electrical cabinet) in C language for PIC microcontrollers from Microchip and electric circuits.Peripherals used: RS-485 and 1-WireSupported existing microcontroller controlled devicesChecked devices that failed testing on the test bench.Designed electric circuits in P-CAD for devices with microcontrollers and PoE IC.Selected ICs, debugged and tested prototypes.