Nordic Semiconductor (nRF52 / nRF53 Series)
Projects Done:
nRF52833 – Electronic Pump Control
- Firmware for AC electronic pump controller
- Capacitive water detection
- Current consumption monitoring
- DSP-based FFT algorithm to detect dry-run (no-load motor condition)
- TRIAC control with zero-crossing synchronization
- Bluetooth BLE communication
- DFU (Device Firmware Update) via BLE
- Real-time motor safety and efficiency control
nRF5340 – Multi-Sensor LoRaWAN Telemetry System
- Firmware developed using Zephyr RTOS
- LoRaWAN communication (SX1276 – 868 MHz)
- GPS data acquisition (u-blox module)
- Three NTC temperature channels
- Laser distance sensor
- Data uplink to Helium LoRaWAN Network
- Cloud logging to Google Sheets
- Power management and sensor synchronization
- Fully validated field system
nRF52 – Motion Sensor Platform
- Firmware for gyroscope-based motion sensing
- Real-time data acquisition
- Sensor fusion and digital filtering
STMicroelectronics – STM32 Family
STM32G0 – AC Coffee Machine Controller
- Low-level C firmware
- Developed with STM32CubeIDE
- PID control loop for heater
- PWM synchronized with AC mains
- Control of:
- Heater
- Pump
- Solenoid valve
- User buttons and switches
- Full safety and temperature regulation logic
STM32F1 – Industrial Laser Measurement Systems
- Firmware for laser control and measurement
- LCD reverse engineering and protocol decoding
- Used in trash volume measurement systems on garbage trucks
- Developed in C language
- Extensive use of STM32Cube and Keil uVision
STM32F4 – RFID Control Systems
- Firmware for 915 MHz RFID controllers
- Used for cattle inventory tracking
- Communication with Syncotek RFID modules
- Real-time inventory data acquisition
- Developed Antena and Hardware Integrated
STM32F1 – Temperature & GPS Monitoring
- Firmware for DS18B20 digital temperature sensors
- Integration with GPS tracking systems
- Data logging and telemetry transmission
STM32F1 – Automotive Angular Position Measurement
- Firmware for angular position sensing
- Applied to Comelec gearbox actuator (Citroën C4)
- PWM-based angle measurement and control
- Automotive-grade real-time response
STM32F1 – Stepper Motor Control System
- Firmware for stepper motor motion control
- Used for directional antenna gain measurement
- Accurate positioning and sweep automation
STM32F1 – Custom UHF RFID Readers
- Firmware for custom 915 MHz RFID readers
- On-demand industrial production
- Low-level embedded C
- Communication with RF front-end and host systems
STM32C011 – Temperature Control
- Ultra Low Power Consumption 230VAC RC Power Supply
- Triac Controller
- Preset of temperature controlled by Main Frequency
- Low-level embebded C, MXCubeIDE
- Ultra low cost
STM32G0 – Pump Controller with Capacitive Detector
- Developed in RTOS
- Use of block “touch sensor” native from STM
- Design and tests of capacitive sensor
- Integrated Low Power RC Power Supply
Espressif – ESP32 Family
ESP32-S2 – Wi-Fi Heater Controller
- Firmware with Wi-Fi connectivity
- Network-based temperature monitoring
- Remote configuration and safety control using Putty TCP Terminal
- Developed in C /RTOS
- Capacitive Sensor Integrated design and tests
- Display 7 segments
- Bulk Power Supply Renesas Design
- Triac Control with Zero Crossing Detector
ESP32-C6 – Wifi Electronic Heater
- Firmware developed with C/RTOS
- Wi-Fi + Bluetooth connectivity
- CLI (Command Line Interface) for configuration and Management
- Management of:
- High-voltage buck converter
- Temperature regulation with NTC
- Protection systems by firmware
- Design of High Voltage Bulk Power Supply from Renesas
- Capacitor Sensor I2C from Azoteq
- Ultra precise temperature sensor with NTC
- Ultra compact design
Microchip / Atmel AVR
ATmega324 – Industrial Temperature Control
- Firmware for plastic melting temperature regulation
- Closed-loop thermal control system
- Industrial production environment
ATmega328P – Wireless Sensor Nodes
- Firmware for distributed wireless sensors in C++
- 433 MHz FSK radio link
- Low-power operation
- Sensor data acquisition for:
- Temperature
- Humidity
- Pressure
- Distance
ATmega324 – GPRS Router System
- Firmware for SIMCOM-based GPRS gateway
- SMS and Email alarm transmission
- Communication between sensor nodes and cloud server
Legacy Systems
Intel 8051 – Agricultural Telemetry System
- Assembly-level firmware
- 27 MHz AM telemetry (30 km range)
- Tractor RPM and power measurement
- Data transmission to fixed station for analysis