Zhai L.

Hi!👋 I’m Zhai Lei, an Embedded Firmware Engineer and Electronics Developer specializing in MCU/IoT systems, PCB bring-up, and real-time embedded solutions from Shenzhen, China. With 22+ years of experience, I deliver high-precision embedded systems, robotics, and automation projects for industrial and commercial applications. My Core Expertise Embedded Systems & Wireless Electronics ✔ Microcontrollers: STM32, ESP32/ESP8266, nRF52, Arduino ✔ Wireless Protocols: BLE, WiFi, LoRa, MQTT, RFID ✔ Circuit Design & PCB Layout: Multi-layer, high-density designs, hardware bring-up & debugging ✔ Motor Control & Robotics: PID systems, stepper/servo control, CNC/automation integration ✔ FPGA & Bootloader Development: Custom protocols, OTA updates ✔ IoT Device Integration: End-to-end firmware + hardware solutions Tools & Technologies ✔ Firmware & Languages: C, C++, Python, Embedded C, Arduino IDE, FreeRTOS ✔ Hardware & PCB: KiCad, Altium Designer, Proteus, Sensor & Actuator Interfaces, JTAG/Debugging ✔ Wireless & IoT: BLE, WiFi, LoRa, MQTT, RFID ✔ Robotics & Automation: Motor Control, PID, CNC Programming, Robotics Integration Why Work With Me ✔Expert in Embedded Systems, Wireless Electronics, and PCB Design ✔High-Precision, Optimized, and Scalable Firmware & Hardware Solutions ✔Clear Communication & On-Time Delivery ✔Free Post-Project Support & Troubleshooting ✔Guaranteed Customer Satisfaction