Structured firmware
C/C++ for sensor acquisition, state handling, actuator control, persistent settings, watchdogs, and OTA.
Embedded & IoT Systems Engineer
Building firmware that remains dependable in the real world.
I develop embedded systems from sensor acquisition to connectivity and deployment—with an emphasis on device integration, failure handling, and field troubleshooting.
Open to Embedded Firmware, IoT, and Hardware Integration roles.
- 6 months
- field IoT implementation
- 3.79/4.00
- Telecommunication Engineering GPA
- 845/990
- TOEIC Listening & Reading
How I work
From device pins to trustworthy data.
I focus on the engineering details that determine whether an IoT product can actually be operated, maintained, and diagnosed when something goes wrong.
Communication integration
RS485/Modbus RTU, UART, I²C, Wi-Fi, GPRS/LTE, REST, and MQTT across the device-to-service path.
Field validation
Testing wiring, sensors, power, modems, connectivity, and data flow while documenting findings and corrective actions.
Selected work
My latest portfolio, limited to relevant Embedded & IoT systems.
These four systems best represent my hands-on experience in firmware, hardware-software integration, and field device implementation.
Unrelated academic simulations and low-impact personal experiments are intentionally omitted.
01
Final project • team system for PT Von Florist • 2025–2026
ATOMIC — IoT/WSN Orchid Greenhouse Monitoring & Control
Microclimate monitoring and equipment-control system connecting 10 ESP8266 sensor nodes, 2 ESP32 gateway/controllers, and cloud-edge operation.
- Supported implementation of nodes measuring temperature, humidity, and light and gateway/controllers operating greenhouse equipment.
- Integrated blower, exhaust fan, and dehumidifier control through relay/SSR panels, contactors, thresholds, and schedules.
- Implemented local caching, gateway logging, LCD/RTC/SD card, WebSocket diagnostics, device configuration, connection recovery, and OTA.
02
OmahIoT internship project • 2025
MONIK — Hydroponic Monitoring & Controlling
Internship firmware for hydroponic monitoring and control, combining solution-quality sensors, environmental readings, and condition-based pump control.
- Integrated pH, EC/TDS, water temperature, air temperature/humidity, light, nutrient level, RTC, and Nextion display for system telemetry.
- Developed ESP32 control for nutrient A/B and pH-down pumps with thresholds, stale/invalid-data fail-safes, persistent settings, watchdog, reconnect, and OTA.
03
OmahIoT internship project • sedimentation & flood monitoring • 2025
MOSIBAN — Rainfall Monitoring Device
ESP32/TTGO T-Call rainfall monitoring device sending tipping-bucket telemetry to support sedimentation and flood monitoring.
- Read tipping-bucket events and converted tip counts into rainfall values sent through HTTP/JSON.
- Integrated SIM800/GPRS, DS3231 RTC, Bluetooth Serial diagnostics, reconnect handling, and Wi-Fi OTA.
04
Lecturer research engineering support • outside internship • 2026
IMONIK — Intelligent Monitoring & Controlling for Industrial Hydroponics
Firmware and device-validation support for lecturer-led research on industrial hydroponic monitoring and control using OmahIoT product/hardware support.
- Supported ESP32 sensor/control integration over RS485/Modbus RTU, UART/I²C, display/RTC, water-level sensing, SIM7600, and pumps.
- Built RS485 test firmware for pin/wiring verification, Modbus address scanning, and communication diagnosis before integration.
- Supported persistent configuration, fault handling, local monitoring, and OTA-oriented firmware maintenance.
Systems view
I validate the whole chain, not only one firmware function.
The systems I work on connect physical field conditions to control decisions and operational data that people can trust.
- 01Sensors & actuators
pH/EC, environment, level, relays, pumps
- 02Device buses
RS485, Modbus RTU, UART, I²C, SPI
- 03Control firmware
Acquisition, state, interlocks, cache, faults
- 04Connectivity
Wi-Fi, GPRS/LTE, HTTP/REST, MQTT
- 05Operations
Dashboard, OTA, logging, troubleshooting
Core expertise
Skills backed by real implementation work.
Firmware
- C and C++
- Arduino framework
- PlatformIO
- State-based firmware
- Persistent settings
- Local caching
- OTA and watchdogs
Platforms & hardware
- ESP32 / ESP32-S3
- ESP8266 / Wemos D1 Mini
- TTGO T-Call
- ATmega328p
- Sensors and relay/SSR
- RTC, displays, cellular modems
Device protocols & networking
- RS485
- Modbus RTU
- UART
- I²C
- SPI
- Wi-Fi
- GPRS/LTE
- MQTT
- HTTP/HTTPS and REST
Validation & tools
- Serial monitoring
- Multimeter and wiring checks
- Git/GitHub
- CMake
- Linux/SSH
- Field troubleshooting
- Technical documentation
Experience
Professional work that shaped my engineering focus.
Hardware Development / IoT Engineer Intern
CV. OmahIoT
- Supported agricultural IoT implementation from site survey through deployment, testing, and documentation.
- Programmed ESP32, ESP8266, TTGO T-Call, and ATmega328p devices for sensing, relay control, local data, and remote monitoring.
- Troubleshot power, wiring, sensors, serial communication, Wi-Fi/GPRS, and data transmission.
IMONIK research contribution
Supported lecturer research by developing and testing an industrial hydroponic firmware system using OmahIoT hardware/product support outside the internship period.
Education
Politeknik Negeri Semarang
Bachelor of Applied Engineering in Telecommunication Engineering • GPA 3.79/4.00
2022–2026 • Graduated; final project defense passed (certificate of graduation issued July 27, 2026).Certifications & languages
- C++ Essentials 1 — Cisco Networking Academy (2026)
- Hardware Development Internship — OmahIoT (Very Good, 2025)
- CCNA: Switching, Routing and Wireless Essentials (2024)
- TOEIC Listening & Reading 845/990 (valid until Nov 2027)
- Indonesian — native • English — professional working proficiency
Let’s connect
Looking for an engineer who enjoys firmware and field reality?
I am open to junior opportunities in embedded firmware, IoT systems, electronics integration, hardware validation, and device testing.