Custom Firmware Development for ESP32 & STM32

I turn your ideas into smart, functional, and connected devices. Specializing in ESP32 and STM32 microcontrollers.

Do you have a hardware project that needs a software soul? Or an existing product to make "smart"? Firmware development is the heart of every modern electronic device. I write robust, efficient, and custom code to bring your products to life, from prototype to mass production.

My Firmware Development Services

I offer a comprehensive service to support you through every stage of the product lifecycle.

Custom Firmware Design and Development: Writing code from scratch, optimized for the specific needs of your hardware and features.
Rapid Prototyping: Developing Proof-of-Concept (PoC) and functional prototypes to quickly validate your idea in the field.
Connectivity and IoT: Implementing communication protocols for connected devices (Wi-Fi, Bluetooth/BLE, LoRa, MQTT, HTTP) to integrate your product with cloud platforms and mobile apps.
Resource Optimization: Developing low-power firmware for battery-operated devices and optimizing performance for critical applications.
Sensor and Actuator Integration: Managing any type of sensor (temperature, humidity, accelerometers, GPS, etc.) and controlling actuators (motors, relays, displays).
Board Support Package (BSP) and Drivers: Developing custom drivers for specific peripherals and components.
Debugging and Maintenance: Analyzing, fixing bugs, and updating existing firmware to improve stability and functionality.

Specialized Platforms

I have deep experience with the most versatile and powerful microcontrollers on the market.

STMicroelectronics STM32

For applications requiring high performance, reliability, and precise control of peripherals.

Advanced peripheral management (ADC, DAC, PWM, CAN, I2C, SPI).
Development based on the STM32CubeMX and HAL/LL ecosystem.
Implementation of Real-Time Operating Systems (RTOS) like FreeRTOS for complex, multitasking applications.

Espressif ESP32

ESP32 Microcontroller Logo The ideal choice for connected devices (IoT) and rapid prototypes thanks to its unbeatable cost/performance ratio and integrated connectivity.

Development of applications with Wi-Fi and Bluetooth (Classic & BLE).
Use of the native ESP-IDF framework for maximum control or the Arduino platform for faster development.
Creation of embedded web servers, MQTT clients, and REST API management.

My Approach

Analysis: We start with your idea. Together, we analyze the functional requirements, technical challenges, and project goals.
Design: I define the software architecture, choosing the most suitable components and technologies to ensure a scalable and maintainable result.
Agile Development: I write clean, modular, and documented code. I keep you constantly updated on progress with incremental releases.
Testing and Validation: I perform rigorous tests to ensure the firmware is stable, secure, and meets all required specifications.
Delivery and Support: I deliver the complete source code and offer post-launch support for any integrations or future evolutions.

Ready to bring your hardware project to life?

Whether you are a startup, an established company, or an innovator, I can help you develop the firmware that makes a difference.

Let's Talk About Your Project

Case Study

Which microcontrollers (MCUs) do you have the most experience with?

We have extensive experience with various architectures, specializing in ARM Cortex-M (particularly STM32, NXP, Nordic) and 8/16-bit architectures like AVR and PIC for simpler applications. We are also experts in using SoCs with integrated connectivity, such as the ESP32.

How do you handle firmware version control?

We use Git for version control. Every project has its own dedicated repository, and we follow methodologies like GitFlow to manage development branches, releases, and hotfixes in an organized and traceable manner.

Do you also provide testing and validation services?

Absolutely. We develop unit and integration tests to validate individual firmware components. We also perform functional tests on the final hardware device to ensure its behavior complies 100% with the required specifications.

Can you take over a project already started by another team?

Yes, we have experience in taking over existing projects. The first step, in this case, is a thorough analysis of the existing code and documentation to assess maintainability and plan the next steps in agreement with the client.

Domande Frequenti (FAQ)

Case Study: Firmware Optimization for a Low-Power IoT Device

Client: A leading company in the precision agriculture sector.

Objective: To develop firmware for a battery-powered environmental sensor (humidity and temperature) with the goal of ensuring a battery life of at least 5 years on a single charge.

Challenge: The main challenge was to minimize power consumption at every stage of the device's lifecycle: measurement, data processing, and wireless communication (LoRaWAN). The chosen microcontroller was an STM32L4, known for its low-power performance.

Solution Implemented:

Deep Sleep State: The firmware was designed to keep the microcontroller in a deep sleep mode for 99% of the time, waking it up only at programmed intervals for measurements.
Peripheral Management: All non-essential peripherals (like LEDs and debug ports) were programmatically shut down during sleep.
Optimized Communication: The data payload transmitted via LoRaWAN was reduced to the bare minimum, and the transmission power was dynamically adjusted based on signal quality to prevent energy waste.
ADC Caching: Sensor readings were performed quickly, and the results were stored in RAM, allowing the processor to return to sleep immediately after acquisition.

Results:

Exceeded Battery Life: Field tests projected a battery life of over 7 years, exceeding the initial target by 40%.
Reliability: The firmware proved to be stable and reliable, with a 99.99% uptime across hundreds of deployed devices.
Client Satisfaction: The client was able to launch a highly competitive and low-maintenance product on the market.