Arif A.

I am a Power Electronics and Industrial IoT Engineer with over 30 years of hands-on experience in Designing & Development and producing with DFM instruments for some of the most demanding electrical environments in the power and energy sector. I hold a Master's degree in Electrical Engineering from Ohio State University, Columbus, USA. My most significant work includes a 3-phase power transducer currently installed in 132kV grid station CP-30 panels in a national transmission network. This is the engineering standard I bring to every project — whether it is a DIN-rail IoT energy monitor or a complete industrial measurement system. ━━ WHAT I DESIGN ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Industrial IoT devices — ESP32-S3, FreeRTOS, MQTT, 4G LTE, RS-485, Modbus RTU ✔ Energy metering hardware — Class 0.5S accuracy, dual CS5490-ISZ metrology ICs ✔ Modular RTU / datalogger systems — DI/DO, 4-20mA analog IO, multi-protocol ✔ Grid protection and supervision relays — 132kV substation grade ✔ 4-layer PCB design in KiCad — schematic, layout, Gerbers, BOM, DFM-ready ✔ Embedded firmware — FreeRTOS, Modbus RTU slave, MQTT TLS, OTA updates ✔ Solar + grid monitoring systems — independent of inverter brand ✔ Technical documentation — application notes, datasheets, user manuals ━━ CURRENT ACTIVE PROJECTS ━━━━━━━━━━━━━━━━━━━━━━━━ Currently developing for a long-term industrial client: - Modular RTU — ESP32-S3, MQTT, GSM, Ethernet, RS-485 Modbus, 4-20mA IO, solar monitoring, generator synchronisation - 132kV Trip Circuit Supervision Relay - 1-phase utility grade energy meter - 5kW Solar Inverter - 600W Inverter ━━ WHY HIRE ME ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I do not design hobby projects. I design industrial products and instruments that operate in 132kV substations, factory floors, and grid-connected solar installations. My work is calibrated, documented, and production-ready. If your project involves power measurement, industrial communication protocols, or IoT connectivity in a demanding environment — this is my primary domain, not a secondary skill. ━━ ENGAGEMENT MODEL ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I work on milestone-based fixed-price projects and hourly contracts. For hardware design projects, I always recommend a brief paid discovery phase to define scope and prevent surprises. I respond within a few hours and provide honest assessments of feasibility before any work begins. Message me with your project description. I will tell you within 24 hours whether it is a strong fit and what a realistic scope and budget looks like.