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We are seeking a practical engineer to develop, integrate and troubleshoot intelligent electrical and electronic systems combining hardware, embedded software and automation. The scope includes microcontroller programming, C/C++ firmware, STM32/ESP32/AVR/PIC platforms, sensor networks, data acquisition, ADC/DAC, PWM, motor and actuator control, communication protocols and real-time embedded applications. The engineer should also be capable of working with analog/digital electronics, mixed-signal circuits, PCB design, schematic modification, component selection, BOM and prototype manufacturing. Additional work may include power supplies, MOSFET and relay circuits, battery systems, industrial control, IoT devices, wireless communication, monitoring systems and electromechanical integration. Strong practical experience with PCB bring-up, oscilloscope/logic-analyzer testing, firmware debugging, fault diagnosis, prototype assembly, system validation and first-revision improvements is required. Experience integrating complete smart electrical systems from hardware through software is highly valued.
Project ID: 40749068
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26 freelancers are bidding on average $658 USD for this job

Hi, I have experience in designing Circuits and can complete your project. I have expertise in the following: 1- Designing schematic and PCBA 2- Ordering the PCBA and getting boards manufactured. 3- Writing firmware for the PCBA to make sure everything works as expected. 4- I can also develop smartphone apps to communicate and control the hardware. If you wish we can discuss in chat. Thank you.
$600 USD in 7 days
7.5
7.5

You need an engineer who can design and integrate complete embedded systems, firmware, electronics, PCB, and field testing, not just write code in isolation. I have a 4.99/5 rating from 149 reviews on Freelancer, 143 projects completed, 99.5% on time and 99.8% on budget. My background is software architecture and automation, so I approach embedded work from a systems integration angle. I would start by understanding your sensor requirements and control logic, then select the right microcontroller platform (STM32, ESP32, or AVR depending on processing needs and connectivity). I would write clean C/C++ firmware for ADC sampling, PWM motor control, and communication protocols like UART, SPI, or I2C. For hardware, I would review or modify schematics, choose components for power supplies and MOSFET drivers, prepare a BOM, and coordinate prototype assembly. Once boards arrive I would bring them up with oscilloscope and logic analyzer, debug signal integrity and timing issues, and iterate the design based on real-world testing. Part of my portfolio involves automation platforms like AutoMark AI and trading systems with real-time data acquisition, so I understand tight timing loops and reliable operation, though those were software-focused. What is the primary application domain for this system, industrial control, IoT monitoring, or something else, and are you starting from an existing design or from scratch? Let's talk and get started. Thank you.
$1,200 USD in 10 days
6.8
6.8

Hi there, I carefully reviewed your requirement for a practical engineer capable of integrating embedded hardware, electronics, sensors, power systems, communication interfaces, and prototype-level troubleshooting into complete smart control systems. I am a mechatronics engineer with almost half a decade of experience in embedded electronics, PCB design, power supplies, hardware prototyping, and interfaces such as UART, SPI, I2C, USB, SDIO, PCIe, and related mixed hardware systems. I also have experience with schematic capture, multilayer PCB layout, component selection, and board-level development using Altium Designer. Because embedded hardware, PCB development, power electronics, sensors, and electromechanical integration are already part of my core skillset, I can approach system development efficiently while keeping manufacturability, debugging, reliability, and practical prototype integration in focus. Please send me a message so we can discuss the project and start. Best regards, Samuel tshibangu
$605 USD in 1 day
6.6
6.6

Hey there! I’m Alok, A PCB, Circuit and Mechanical designer with a passion for turning ideas into rock-solid, high-performance circuit boards. even expert on Python, C, C++ With nearly a decade of experience, I’ve tackled everything from compact consumer gadgets to complex industrial systems—always with a focus on precision, efficiency, and reliability. # Schematic & Layout Design – Clean, optimized, and manufacturable. # Component Selection & Library Management – No surprises, just the right parts for the job. # Reverse Engineering – PCB cloning, replication, and improvements. # Gerber, BOM & CPL Generation – Ready for seamless production. # DFM & DFA Expertise – Because great design means smooth manufacturing. # Multi-Layer, Flex, & High-Density PCB Design – Whatever the project needs. If you need a PCB and Code that’s efficient, reliable, and built for real-world performance, let’s chat. I’d love to help bring your project to life!
$1,200 USD in 7 days
5.9
5.9

Hello, I’m a Senior Electronics & Embedded Engineer with a Phd degree in Electronics Engineering and over 8 years of experience in electronics design and development. My core expertise includes: • Analog and digital circuit design • Embedded systems and firmware development using STM32, ESP32, and microcontrollers • FPGA and VHDL development • DC-DC and DC-AC converter design • Power electronics and power supply design • PCB design using Altium Designer • Signal processing and hardware development • Circuit simulation using LTspice and PSpice • Hardware debugging, testing, and optimization I can handle projects from requirements analysis and initial concept through circuit design, simulation, PCB design, firmware and development. Examples of my previous projects and technical work are available in my portfolio, where you can review my experience and capabilities
$700 USD in 8 days
5.5
5.5

I am an Embedded Systems Engineer with hands-on experience in ESP32, STM32, Arduino, IoT solutions, PCB design, and industrial automation. I specialize in developing complete hardware and firmware solutions from concept to production. My experience includes sensor integration, wireless communication, data logging systems, Ethernet and Wi-Fi connectivity, MQTT communication, cloud integration, and custom PCB development. My expertise includes: • ESP32 Firmware Development • STM32 Firmware Development • Arduino Projects • PCB Design using Altium Designer • IoT Solutions (Wi-Fi, BLE, Ethernet, MQTT) • AWS IoT Integration • Sensor Integration and Calibration • Data Logging Systems • Industrial Automation Projects • Embedded Linux Development • Serial Communication (UART, RS485, Modbus) • I2C, SPI, CAN Bus Development • Product Prototyping and Testing Recent project experience includes: • ESP32 Ethernet-based monitoring systems • BLE sensor networks with multiple wireless nodes • Engine dynamometer data acquisition systems • Industrial pressure, temperature, RPM, and level monitoring systems • MQTT-based cloud monitoring solutions • Custom PCB design and manufacturing support I focus on delivering reliable, well-documented, and production-ready solutions while maintaining clear communication throughout the project.
$605 USD in 15 days
5.0
5.0

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq
$600 USD in 7 days
5.3
5.3

Your need for an engineer adept at developing and integrating intelligent electrical and electronic systems for automation, specifically mentioning microcontroller programming, C/C++ firmware, and platforms like STM32 and ESP32, aligns perfectly with my experience. I've successfully delivered similar projects involving real-time data acquisition and control loops, ensuring robust hardware-software integration from concept to prototype. My approach involves a structured development process. I'll leverage STM32CubeIDE for firmware development, utilizing HAL libraries and RTOS where necessary for efficient real-time operation. For sensor networks and data acquisition, I'll implement efficient communication protocols (e.g., I2C, SPI, UART) and optimize ADC/DAC configurations. Motor and actuator control will be managed via PWM generation, with careful consideration for power electronics and feedback mechanisms. Schematic modifications and component selection will be guided by datasheets and application notes to ensure reliability and cost-effectiveness for prototype manufacturing. To ensure we're fully aligned, could you elaborate on the specific sensor types anticipated for the data acquisition phase and the expected real-time update rate for critical control loops? I’m eager to discuss how my technical expertise can directly address your project’s requirements.
$942 USD in 21 days
4.3
4.3

Hello, The main challenge is integrating embedded firmware, mixed-signal electronics, communications, and electromechanical control into one reliable automation system. The first milestone should establish a practical architecture and a clear path from prototype bring-up to validated operation. I would structure the work around the selected MCU platform, sensor and actuator interfaces, real-time C/C++ firmware, communication protocols, and robust fault handling. Schematics, BOM decisions, PCB considerations, power distribution, and test points would be aligned with oscilloscope and logic-analyzer validation from the start. Similar work includes intelligent IoT and automation systems involving embedded control, API-connected monitoring, sensor data acquisition, motor or relay outputs, and firmware troubleshooting. I focus on practical debugging and first-revision improvements rather than isolated code delivery. Within 7 days, I can deliver the first working milestone: system architecture, interface mapping, firmware foundation, integration priorities, and a validation plan, with clean documentation and maintainable implementation. I can then continue through prototype testing and refinement. Best regards, Bohdan
$1,200 USD in 7 days
3.9
3.9

I can help develop and integrate reliable hardware, embedded firmware, and automation systems with a practical, troubleshooting-focused approach. I have experience with embedded systems, microcontrollers, sensors, communication protocols, PCB design, and hardware/software integration. I can also support schematic updates, component selection, firmware debugging, PCB bring-up, testing, and prototype validation. I focus on identifying faults quickly and delivering stable, well-tested first-revision solutions. Please message me so we can discuss further.
$605 USD in 7 days
5.2
5.2

Hi there, With a focus on automation, I've successfully delivered 56 projects with a 96% on-time delivery rate. My skills span across software development to AI, engineering to CMS, eCommerce to digital growth. I have practical experience programming microcontrollers in C/C++, utilizing platforms such as STM32/ESP32/AVR/PIC and working with sensor networks, data acquisition systems, and PWM motor control. I specialize in designing and bringing up PCBs, testing them with oscilloscopes and logic analyzers, debugging firmware, diagnosing faults and controlling the prototyping manufacturing process. Furthermore, I'm experienced with analog/digital electronics, mixed-signal circuits, power supplies, industrial control systems and wireless communications. Best regards, Mobasher Reza
$605 USD in 3 days
3.3
3.3

Hi, I can handle this complete **hardware + embedded firmware + automation workflow**, from schematic modification and component selection through prototype bring-up, debugging and system validation. I have **16 years of practical embedded and electronics R&D experience** with STM32, ESP32, AVR and other MCU platforms, covering industrial automation, IoT, automotive electronics, sensor systems, power electronics and custom PCB development. My experience includes **C/C++ firmware, ADC/DAC, PWM, timers, interrupts, DMA, UART, SPI, I²C, CAN and RS-485/Modbus**, along with motor/actuator control, MOSFET/relay drivers, battery systems and industrial sensors. On the hardware side, I work with **analog/digital and mixed-signal circuits, PCB design, BOM, power supplies and prototype manufacturing**. I routinely use oscilloscopes, logic analyzers and multimeters for PCB bring-up, signal verification and firmware debugging. I have completed projects involving **ESP32/STM32 industrial controllers, pressure DAQ, motor/relay automation, IoT systems, GPS/cellular devices and custom PCBs**, including first-revision troubleshooting and optimization. I can provide practical, well-documented solutions from **hardware → firmware → integration → testing → final validation**. Best regards, Subhash Suman Embedded | STM32 | ESP32 | PCB | Firmware | Industrial Automation
$500 USD in 7 days
2.3
2.3

I have practical experience in setting up a profile cutting section with motorized positioning and feedback, including developing firmware for microcontrollers in C/C++ for controlling drives and sensors. I can take on the full cycle from prototyping to system validation. How do you plan to organize data exchange between the hardware and the control system?
$470 USD in 14 days
1.3
1.3

With my wealth of experience and broad skillset in C/C++ programming, digital and embedded systems, and diverse microcontroller platforms like STM32/ESP32/AVR/PIC, I am well-equipped to handle the software and hardware needs of your automation project. I am very adept at working with sensor networks, data acquisition, motor control, communication protocols, as well as developing real-time embedded applications that couple efficient power usage and battery systems. My knowledge of mixed-signal circuits and strong competence in PCB design would also be valuable for the prototype manufacturing stage. Furthermore, my work is not just about writing codes or drawing circuit diagrams; my methodology involves deeply understanding the mechanical aspects of a project to develop efficient, practical designs considering materials, fabrication methods and cost optimization. This multifaceted approach has facilitated the successful completion of various industrial automation projects and customized machinery over the years. I understand that seamless integration across all levels considerably enhances the performance and overall quality of a complex system such as yours. My diverse interdisciplinary experience enables me to precisely accomplish this thereby minimizing complexities for your project, allowing you to breathe easy while I bring life to your electrical system landscape. Let's begin this fulfilling journey.
$1,500 USD in 25 days
1.1
1.1

I have a proven track record of turning ideas into reality and creating impactful solutions. As a highly organized and detail-oriented professional, I can meticulously handle different aspects of this project - from microcontroller programming to data acquisition, ADC/DAC, sensor networks and more. I can actively operate on mixed-signal circuits as well as contribute reliably to PCB design, schematic modification, component selection and BOM. One of the highlights of my career is providing long-term support and collaboration to all my clients. Rest assured you'll be getting someone who will not only integrate smart electrical systems from end-to-end but will also ensure timely improvement. My focus is always client satisfaction; I build solutions that help my clients' projects to grow exponentially. Don't just go for conventional; come onboard with me where technology meets creativity.
$605 USD in 7 days
1.2
1.2

Hi, there In a similar project, I developed an industrial automation system using STM32 microcontrollers for motor control and sensor networks. I implemented features such as motor control using PWM, sensor data acquisition, and communication protocols like UART and SPI. However, I encountered challenges with PCB bring-up and debugging firmware. I solved these issues by using oscilloscope/logic-analyzer testing and implementing fault diagnosis techniques. To tackle this project, I plan to use a modular approach, separating hardware and software development. I will use STM32CubeMX for microcontroller programming and implement sensor networks using ESP32 modules. For analog/digital electronics, I will use tools like KiCad for PCB design and schematic modification. I will also utilize mixed-signal circuit analysis to optimize component selection and BOM. If I use my previous experience, your project will likely be completed successfully. Hope to discuss this in detail. Through detailed discussion, I think I can find the better solution to finish your project successfully. Thank you.
$10 USD in 7 days
0.0
0.0

Hello, With an extensive background in Automation, Electrical and Electronics Engineering, and Microcontroller programming, I believe I'm the perfect fit for your Electronic Systems Engineer role. Over the years, I've successfully designed, integrated, and troubleshooted intelligent electrical systems while combining hardware, embedded software, and automation. My sound knowledge of C/C++ firmware, STM32/ESP32/AVR/PIC platforms will be invaluable for your project. Moreover, my comprehensive experience with sensor networks, data acquisition, ADC/DAC, PWM, motor and actuator control coupled with my ability to work with analog/digital electronics and mixed-signal circuits sets me apart. My skills expand beyond hardware towards software which aligns perfectly with your real-time embedded applications requirements. In addition to my practical experience in PCB bring-up, oscilloscope testing etc., which seems highly relevant to the role at hand, I have exceptional firmware debugging capabilities which paired with my fault diagnosis skills ensures effective troubleshooting when required. Allow me to leverage my strengths in all aspects of this project to meet and exceed your expectations & let's transform your plans into reality! Thanks!
$20 USD in 1 day
0.0
0.0

<<<✔Consider it DONE✔>>> YO! I understand your project and I'm eager to help. Drawing from my extensive experience in building smart electromechanical systems, I am confident that I am the perfect fit for your Electronic Systems Engineer position. Over the years, I have meticulously honed my skills in C++, microcontroller programming, system integration, and real-time embedded applications. With a keen eye for detail, I am also adept at PCB design and modification, assembly and prototyping as well as sensor networks. Looking forward to being part of your project! You will surely be impressed by my work! Not sure what the next step is? I offer free and professional consultation -- I'm just a text away. All the very best, Josh
$605 USD in 2 days
0.0
0.0

Hi, I can develop and troubleshoot complete embedded systems across STM32, ESP32, AVR/PIC, C/C++ firmware, sensors, ADC/DAC, PWM, motor control, communication protocols, and real-time applications. I also have practical experience with PCB design, schematic/BOM work, power electronics, IoT, debugging, testing, and hardware-software integration. Regards, **Abdul Samad**
$500 USD in 7 days
0.0
0.0

Hello, I’m interested in working with you on the development, integration, and troubleshooting of your intelligent electrical and embedded systems. I have practical experience across embedded firmware, microcontrollers, electronics, PCB development, automation, and complete hardware-software integration. I can support the project from initial schematic and component selection through prototype assembly, firmware development, testing, debugging, and final system validation. My relevant experience includes: Microcontrollers & Firmware: STM32, ESP32, AVR, PIC, C/C++ firmware development, RTOS and real-time embedded applications, UART, CAN, I2C, SPI etc Analog & Digital Electronics: Mixed-signal circuits, power supplies, protection circuits and interface electronics PCB Development: Schematic modification, PCB design/review, component selection, BOM preparation and prototype manufacturing Debugging & Bring-up: PCB bring-up, oscilloscope and logic-analyzer testing, firmware debugging, fault isolation and hardware validation System Integration: Connecting sensors, controllers, communication modules, power electronics and electromechanical components into a reliable working system Best regards, Perfect Solutions
$605 USD in 7 days
0.0
0.0

Brahmanbaria, Bangladesh
Member since Aug 11, 2026
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