Profile of Freelancer Романа

Electronics developer, programmer.

I understand the process of creating devices well: from the task statement to serial samples.

Development experience – more than 10 years:
- Software for microcontrollers.
- Schematics and design of printed circuit boards.
- Prototype and pre-production samples.
- Client software for mobile devices and PC.

I work with microcontrollers.
Nordic nRF52832 / nRF52840
STM32 series L1, F1, F4, F7 and L4.
ESP32.

Devices are developed for such applications:
IoT,
Industrial IoT,
Smart homes,
Automation,
Wearable electronics,
Medical equipment,
Anything else.

I propose the development of wireless devices with: BLE, WIFI, radio channel 868 MHz, GPRS/4G. We have experience in developing a full-fledged MESH network at 868 MHz.

We have experience in developing well-protected data exchange systems based on microcontrollers. Encryption, public/private keys, digital signature.

I create compact devices for the size of the CR2032 battery with BLE.

Power electronics:
I understand how to create efficient DC/DC converters, how to control electric motors, etc. D.
I know how to manage different loads. And 220 volts, and low-voltage.

Experience with various sensors and sensors: temperature, light, CO2, particulate matter, pressure, humidity, touch, tenso sensors, etc.
With different interfaces: I2C, UART, SPI, PWM.

I write in C, C++, Java. I know Python, ARM assembler and x86. I can combine C++ and assembler parts of the code. I like optimization.

I can create software with or without RTOS.

Knowledge of algorithms is available: queues, related lists, state machines, message managers, processing sensor readings taking into account hysteresis, calculating the median of readings and other non-complex, but specific for microcontrollers and emblematic development algorithms.