Johny H.

I help businesses and innovators transform ideas into reliable electronic products. Combining hands-on electronics experience with embedded software development, I design custom PCBs, develop firmware, and integrate hardware and software solutions for IoT and automation applications. With over 10 years of experience troubleshooting, testing, and repairing industrial electronic controllers used in elevator and generator systems, I bring a practical mindset focused on maintainability and real-world performance. Services: ⚡ PCB design using KiCad 💻 Embedded firmware development in C/C++ 📦 Enclosure CAD design 🔧 Hardware prototyping, testing, and debugging 🌐 Web interfaces and dashboards (JavaScript, HTML, CSS, PHP) 📡 IoT solutions 📋 Technical documentation and support Microcontrollers: 🔲 STM32 🔲 ESP32 / ESP8266 🔲 RP2040 🔲 PIC16 Communication Protocols 📡 HTTP / HTTPS 📡 MQTT 📡 ESP-NOW 📡 WebSocket Hardware Interfaces 🔌 UART 🔌 SPI 🔌 I²C 🔌 I²S 🔌 RS-232 🔌 RS-485