Hire the Best ESP32 Freelancers
in India

Custom PCB Design for IoT and Electronics Projects esp32,esp8266 I have experience in PCB design and layout for embedded systems, IoT devices, and custom electronics. From schematic capture to Gerber file generation, I ensure every design is optimized for performance, reliability, and manufacturability. Whether you need a prototype PCB for testing or a production-ready design, I can help bring your ideas to life. You can check out my personal projects.

I am an electronics and firmware developer with experience in PCB design, firmware development, prototyping and SMD assembly. My journey started with hand crafting single sided PCBs — giving me a strong practical foundation from the ground up. PCB Design: 2 and 4 layer PCB design in KiCad 8,Kicad 9(Soon migrating to Kicad 10) & EasyEDA(Standard & Pro version) . Former EagleCAD user Schematic to manufacturing ready layout Custom footprint creation Gerber, drill, pick and place and BOM files Full submission support for JLCPCB(PCB & PCBA) and similar manufacturers Assembly & Prototyping: SMD soldering — 1206-0402 passives, QFN, TSSOP (except BGA) Through hole soldering Small batch prototype assembly Component procurement support Firmware & Connectivity: Microcontrollers — ESP32, ESP8266, Arduino, AVR, 8051 Cellular — Quectel EC25 & SIMCom SIM7672 with MQTT SSL/TLS Wireless — LoRa, WiFi, Bluetooth, GSM GPS — Ublox & Quectel module integration Displays — OLED, TFT, capacitive touch Protocols — I2C, SPI, UART, MQTT SSL/TLS, HTTP REST Motor drivers, WS2812 LED arrays, power circuits GPS- Quectel L89, Ublox M10S Special - WS2812 Led Projects include: GPS trackers, GSM security systems, water level controllers, , line followers, obstacle detection robots, WS2812 LED arrays and various ESP32 and Arduino IoT devices. I am a full time freelancer committed to clear communication and timely delivery — working with hobbyists, startups and commercial clients alike. Feel free to reach out!

# I am an Embedded Engineer with more than 12 years of industry experience in Embedded Systems Design & Development. # Have experience in delivering solutions for the Internet of things (IoT), Home Automation & Control, Production Utilities, Microprocessor/Microcontroller and Wireless technologies. # Below are some of my expertise in Embedded Systems: - Microcontrollers 8/16/32 ( ARM | PIC | STM32 | Nordic nRF51 & nRF52 | NXP ) - Embedded Platforms ( ESP32 | ESP8266 | Raspberry Pi | Arduino | Beaglebone ) - RTOS ( FreeRTOS | Amazon FreeRTOS | Micrium OS | eCOS | Embedded Linux ) - Wireless Protocols ( BLE | Bluetooth | Zigbee | WiFi | Thread | LoRa | LoRaWAN ) - Wired Protocols ( I2C | SPI | RS232 | RS485 | Modbus | CAN ) - Compilers & IDE ( GCC | Keil uVision | IAR | Simplicity Studio | Eclipse | CodeWarrior ) - Cloud Platforms Integration ( AWS IoT | Ayla | Evrythng | Firebase )

🚀 Top Rated Plus | ESP32 & STM32 Firmware Developer | Embedded Systems & IoT Engineer | 6+ Years Experience Looking for an experienced Embedded Firmware Developer who can turn your idea into a reliable, production-ready product? I'm a Top Rated Plus Embedded Systems & IoT Engineer with over 6 years of experience developing embedded firmware, designing custom hardware, and building IoT products for startups, SMBs, and enterprise clients worldwide. I specialize in: • ESP32 Firmware Development • STM32 Firmware Development • Embedded C & C++ • ESP-IDF • FreeRTOS • BLE • MQTT • IoT Product Development • PCB Design • LVGL • TouchGFX • AWS IoT I provide complete end-to-end engineering services, from hardware design and firmware development to cloud connectivity, GUI development, testing, and production support. ━━━━━━━━━━━━━━━━━━━━━━ WHY CLIENTS HIRE ME ━━━━━━━━━━━━━━━━━━━━━━ • Top Rated Plus Freelancer with a proven track record • Production-Ready Firmware • Clean, Maintainable & Well-Documented Code • Fast Communication & Daily Progress Updates • Strong Debugging & Problem Solving Skills • End-to-End Product Development • Long-Term Technical Support ━━━━━━━━━━━━━━━━━━━━━━ FIRMWARE DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━━━ Programming Languages • C • C++ • Python Expertise • Embedded Firmware Development • Bare-Metal Programming • FreeRTOS • Zephyr RTOS • ESP-IDF • STM32Cube • Arduino Framework • PlatformIO • Mbed OS • Bootloader Development • Secure Boot • OTA Firmware Updates • Device Driver Development • Memory Optimization • Low Power Design • Firmware Optimization ━━━━━━━━━━━━━━━━━━━━━━ MICROCONTROLLERS ━━━━━━━━━━━━━━━━━━━━━━ Espressif • ESP32 • ESP32-S2 • ESP32-S3 • ESP8266 STMicroelectronics • STM32F0 • STM32F1 • STM32F3 • STM32F4 • STM32H7 • STM32WB • STM32U5 Nordic • nRF51 • nRF52 Microchip • PIC12 • PIC16 • PIC18 • PIC24 • dsPIC30 • dsPIC33 • PIC32MX • PIC32MK • PIC32MZ ━━━━━━━━━━━━━━━━━━━━━━ COMMUNICATION PROTOCOLS ━━━━━━━━━━━━━━━━━━━━━━ • UART • USART • SPI • I²C • I²S • CAN Bus • USB (CDC, HID, DFU, MSC) • Ethernet • RS485 • Modbus RTU • Modbus TCP • OneWire • ADC • DAC • PWM • SD Card • SDMMC ━━━━━━━━━━━━━━━━━━━━━━ WIRELESS & CONNECTIVITY ━━━━━━━━━━━━━━━━━━━━━━ • Bluetooth Low Energy (BLE) • WiFi • MQTT • HTTPS • WebSockets • LoRa • LoRaWAN • Cellular (4G/5G) • Zigbee • Z-Wave Cellular Modems • SIM7600 • EC25 • EC200U • A7672 Series ━━━━━━━━━━━━━━━━━━━━━━ CLOUD & IoT ━━━━━━━━━━━━━━━━━━━━━━ • AWS IoT Core • Google Cloud • MQTT Brokers • REST APIs • HTTPS • WebSockets • Remote Device Management • Secure Device Provisioning • OTA Firmware Updates ━━━━━━━━━━━━━━━━━━━━━━ GUI DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━━━ • LVGL • TouchGFX • Qt for MCUs Experience • Animated User Interfaces • Touchscreen Applications • Dashboards • TFT Displays • OLED Displays • E-Ink Displays • Capacitive Touch • Resistive Touch ━━━━━━━━━━━━━━━━━━━━━━ HARDWARE & PCB DESIGN ━━━━━━━━━━━━━━━━━━━━━━ Tools • Altium Designer • KiCad Services • Schematic Design • PCB Layout • Prototype Development • Hardware Bring-up • Design for Manufacturing (DFM) • Production Support ━━━━━━━━━━━━━━━━━━━━━━ INDUSTRIES ━━━━━━━━━━━━━━━━━━━━━━ • Industrial Automation • Consumer Electronics • Medical Devices • IoT Products • Smart Home • EV & Automotive Electronics • Wireless Products • Energy Monitoring • Sensor Networks ━━━━━━━━━━━━━━━━━━━━━━ SERVICES I OFFER ━━━━━━━━━━━━━━━━━━━━━━ • ESP32 Firmware Development • STM32 Firmware Development • Embedded C/C++ Development • ESP-IDF Development • FreeRTOS Development • BLE Firmware Development • MQTT IoT Development • Device Driver Development • Bootloader Development • OTA Firmware Updates • PCB Design • Hardware Design • Embedded GUI Development • LVGL Development • TouchGFX Development • Cloud Integration • Firmware Debugging • Performance Optimization • Legacy Firmware Modernization • Complete IoT Product Development If you're looking for an ESP32 Firmware Developer, STM32 Firmware Developer, Embedded Systems Engineer, or IoT Firmware Expert who delivers reliable, production-ready solutions, I'd love to discuss your project. Let's build something amazing together! Best Regards, Haresh Sondagar Embedded Systems & IoT Engineer

Turning Hardware Concepts into Market-Ready, Scalable Products The biggest risk in hardware is a "prototype that works" but cannot be manufactured. A single PCB error or a poor component choice can lead to months of delays and thousands in wasted capital. I help startups and product teams bridge the gap between a breadboard idea and a professional, factory-ready product. With experience in high-stakes industries like Medical Devices and Electric Vehicles (EV), I design for reliability, not just functionality. How I add value to your project: DFM-First PCB Design: I don't just "route traces." I optimize for Design for Manufacturing (DFM) using Altium and KiCad to ensure your boards are easy to assemble and cost-effective. Embedded Intelligence: Specialist in ESP32, STM32, and nRF52 architectures for low-power wearables and complex IoT systems. Medical & Industrial Rigor: My background includes designing TENS/NMES medical spray systems and EV hardware for Baaz Bikes, ensuring your product meets industry standards from day one. Risk Mitigation: I provide detailed Schematic and BOM (Bill of Materials) reviews to catch errors before they hit the fabrication house. Technical Toolkit: Hardware: PCB Layout, Multi-layer Design, Rigid-Flex, Signal Integrity. Firmware: Arduino, C/C++, IoT Cloud Integration, Sensor Fusion. Compliance: Designing for EMI/EMC and medical safety standards. My Commitment: I prioritize clear communication and document every step of the design process. Whether you need a quick schematic review or a full-scale product development partner, I am here to ensure your hardware is robust.

I am an Android Developer with over 6 years of experience, having developed and published several applications available on the Play Store. In addition, I have approximately 7 years of hands-on experience with Arduino and ESP microcontrollers, allowing me to guide, debug, and contribute to electronic projects effectively. Beyond mobile development, I have 3 years of experience working with Django and some proficiency in PyQt for desktop applications. As a full-time freelancer, I am committed to delivering high-quality projects efficiently. If you're looking for someone who can bring your ideas to life or troubleshoot your existing code, feel free to reach out. Look forward to collaborate with you!