Custom IoT Microcontroller Firmware Programming

@hayteekeys

Hi, PLEASE KINDLY GO TRHOUGH MY PROPOSAL WHAT I CAN DO FOR YOUR PROJECT: MY APPROACH: I recommend the ESP32 (e.g., ESP32-WROOM-32) for its dual-core processor, integrated Wi-Fi/BLE, and robust security features, ideal for MQTT/HTTPS cloud connectivity. I’ll write concise C/C++ firmware in PlatformIO, implementing secure MQTT (TLS 1.2) or HTTPS with certificate handling to forward data to your cloud endpoint. The code will include modular functions for device pairing, error handling, and OTA updates, with clear in-line comments. A read-me will detail pin usage, libraries (e.g., PubSubClient, HTTPClient), and compilation steps. I’ll provide a video/log demonstrating cloud connection and suggest any shields (e.g., external antenna for range) based on your interface specs. RELEVANT PROJECTS: I’ve developed an ESP32-based IoT bridge for environmental sensors, using MQTT with AWS IoT, achieving 99.9% uptime, and a Raspberry Pi Pico W firmware for HTTPS data forwarding, integrating BLE for device pairing. QUESTIONS FOR CLARITY: What are the data rate and payload size requirements for the cloud endpoint? Do you prefer MQTT, HTTPS, or both for cloud communication? What are the power constraints (e.g., battery-powered or mains)? Can you share initial interface specs (e.g., UART, I2C) for the “other” IoT hardware? I’m committed to delivering secure, well-documented firmware and hardware guidance within your timeline.

@Microlent

Hello, I’m an experienced embedded developer skilled in IoT firmware programming. What I offer: Advise on the best microcontroller choice (ESP32, Arduino, Raspberry Pi Pico) based on your connectivity and interface needs Develop clean, secure firmware in C/C++ using PlatformIO or Arduino IDE to connect your device to the internet and forward data reliably via MQTT or HTTPS Provide well-documented source code with in-line comments and a concise read-me covering pins, libraries, and build instructions Demonstrate cloud connectivity through video or log capture Recommend any additional components or drivers needed for seamless operation I’ve delivered IoT projects involving secure cloud connectivity and device integration, ensuring robust and maintainable firmware. Best regards, Vicky Keswani

@Ahmed8033

Hello, I am Electronics Engineer and have experience of building and deploying IoT based systems. I have thoroughly read your description about the Custom IoT system. I have experience of building similar IoT based systems. I have used AWS server and security certificates to setup an IoT gateway for data monitoring project. I can setup your project as well as select hardware and software stackup to meet your project goals. Feel free to share more information about your project.

@SMBelectronics

Hello, I’m Abbas Jawadwala, Co-founder & Lead Engineer at SMB ElectroTech. With 5+ years of experience, I’ve delivered projects across PCB design, embedded systems, and product development for clients worldwide. Our expertise includes: - PCB layouts (single to multi-layer, DFM, signal integrity) - Embedded firmware (AVR, ARM, ESP, Arduino) - Power electronics & circuit design - End-to-end prototyping & testing We focus on robust, manufacturable designs with clear communication and on-time delivery. I usually handle one project at a time to ensure full attention and quality. I’d love to discuss your project requirements—I’m available this week for a quick call to get things moving. Best regards, Abbas Jawadwala SMB ElectroTech

@cesur135

As an experienced engineer in the field of industrial automation and electronics, I bring a diverse skill set that could greatly benefit your IoT microcontroller firmware project. I understand the importance of security in IoT devices and have handled secure certificate handling, crucial for ensuring data protection during transmission. In fact, your emphasis on reliable, secure code aligns perfectly with my approach to all projects I undertake - prioritizing qualit y while meeting deadlines. Providing a clear road-map of pin usage, libraries deployment and compilation steps is second nature to me. Though I should mention I've mostly worked on industrial level unlike most freelancers on this platform; this gives me the ability not just-complement the hardware and communicate with IoT devices correctly but design entire architectures that can scale - even if it isn't an express requirement for your current project, it's an asset you-get as counterpart. To sum up, my unique combination of experience in the field of industrial automation, my familiarity with different platforms and programming languages coupled with a strong focus on security makes me a perfect fit for your IoT-firmware project. Let's connect soon to discuss how we can make this happen!

@Zainrais0786

I can develop a well-structured firmware written for a microcontroller that will serve primarily as an IoT bridge either an ESP32 or a raspberry pi. Hi, I am Zain. I can easily handle the task including • Embedded Systems • Firmware Development • IoT • ESP32 / Raspberry pi / STM32 / nrf52 / Arduino • MQTT / HTTP / Web sockets • C / C++ • Embedded Linux / Build root / Yocto / Armbian / Open wrt etc • Circuit Design • PCB Design etc. Lets chat. Best regards

@panchalssolution

Hi, I'm Ankit I'd love to help you build a clean, secure IoT bridge firmware. I’ve worked with ESP32, Arduino, and Raspberry Pi Pico, and I can help you choose the best board based on your connectivity needs. What I’ll Deliver: - Well-commented source code (C/C++) - Simple README with pin details, libraries, and build steps - Demo of cloud connection (via MQTT or HTTPS) - Advice on any extra components or shields Past Projects: 1) Battery Telemetry Bridge (ESP32) Sent battery data to AWS IoT using MQTT with TLS security and OTA updates. 2) BLE to HTTPS Gateway (Pico W) Collected sensor data over BLE and pushed it securely to a cloud API. I focus on reliable code, clear documentation, and smooth cloud integration. Let’s make your IoT bridge solid and scalable. Thanks for considering my bid!

@wyderl24

Hello, I hope this message finds you well. I’m excited about your job posting and would love the opportunity to contribute to your team. I’m eager to learn new skills and bring value to your projects. Please take a moment to review my profile, and feel free to reach out if you have any questions. Thank you for considering my application! Best regards, Wyder

@as348

Hi i have more than 10 yesrs experienced in circuit design and development in my past i have designed lot iot based product design i can design best way under emiemc

@dwashil3000

I am sure you will give me more projects after this. I have done a similar project a week ago. I am interested to do this project too and ready to complete this within the timeline. Pls check my profile to see all rating and reviews given by clients. Hoping to hear from you soon. Note: Budget Negotiable.

@upenderr2509

As an experienced Unity Game developer, I've not only worked on games for different platforms but also developed a strong understanding of IoT and connectivity protocols like MQTT. My adeptness with the C/C++, PlatformIO or Arduino IDE, Wi-Fi/BLE stacks, and secure certificate handling has been my core strength in the IoT domain. I am confident that my skills and proficiency align well with your project's requirements for developing custom firmware for the microcontroller. Throughout my career, I have emphasized on writing concise, well-structured code ridden with clear in-line comments to ensure ease of understanding and future development. My past IoT projects entailed building end-to-end solutions, right from hardware selection to successful integration with cloud services. This experience will be invaluable while advising you on selecting the optimum microcontroller board and other components that best fit your objectives. My professional tenacity is reflected in the game optimizations I've done across diverse platforms, which correlates with your project's need for reliable, efficient code. Additionally, since gaming industry constantly relies on sensor/signal processing and their seamless integration into complex networks,I possess a unique problem-solving ability that helps me identify potential challenges beforehand and proactively tackle them.

@Muba2520

Hello — I’m an embedded firmware engineer with versatile experience in IoT connectivity. I’ve built real-time telemetry systems, production ESP32-S3 firmware (BLE/keypad/OTP), and integrated devices with ThingsBoard, Firebase, and ThingSpeak. I can deliver clean C/C++ firmware (PlatformIO/Arduino IDE) that connects securely over MQTT/HTTPS, with clear inline comments, a README (pin usage, build steps), and a short demo log of cloud connectivity. I’ll also advise on the best board choice (Arduino, ESP32, or Pico) based on your connectivity and power needs. Can we schedule a quick video call to review your cloud endpoint, data format, and requirements so I can give you a firm plan and timeline?

@Vinh2002

I read your description and it is quite similar to my recent training at a smart device programming company. I hope you will choose me for this project.

@shakaibnaqvi401

Hello, I specialize in embedded systems and IoT development, with hands-on experience in ESP32, Arduino, STM32, and Raspberry Pi Pico platforms. I’ve built multiple IoT bridges that connect hardware devices to cloud endpoints using MQTT, HTTPS, and REST APIs. For your project, I can: Recommend the most cost-effective and reliable microcontroller for your use case (ESP32 is usually the best for Wi-Fi/BLE + security). Develop concise, well-structured firmware in C/C++ (Arduino IDE or PlatformIO) with clear in-line comments. Implement secure TLS/SSL communication with your cloud endpoint (MQTT/HTTPS). Provide a read-me document explaining pin usage, libraries, and build steps. Share demo logs/videos showing successful device-to-cloud connection. Guide you on required shields, modules, or drivers if needed. Why me? ✔ Strong background in IoT firmware, embedded C/C++, and electronics design ✔ Experienced with secure connectivity, Modbus, BLE, and cloud integration ✔ Delivered similar IoT connectivity solutions (ESP32 Wi-Fi bridge, Modbus-to-MQTT gateway, sensor-to-cloud data pipelines) ✔ Fast, reliable communication and well-documented code I’d be glad to discuss your exact interface specs so we can choose the right board and architecture before coding. Looking forward to collaborating with you. Best regards, Shakaib Naqvi Embedded Software Developer | IoT & Firmware Specialist

@marioomapo

Hello Dear Client, I have carefully reviewed your project description and fully understand the requirements for creating concise and reliable firmware for a microcontroller acting as an IoT bridge. This includes not only the firmware implementation but also advising you on the best hardware choice (ESP32) based on your connectivity and interface goals. I fully understand the key requirements you need. My background as an Electrical Engineer includes extensive experience with microcontrollers (ESP32, STM32, Arduino family, Raspberry Pi Pico), embedded C/C++, and IoT protocols. I have successfully developed and delivered firmware for Wi-Fi/BLE enabled devices with secure communication (TLS certificates, MQTT brokers, REST APIs) for IoT applications in industrial and consumer environments. My approach will be: * Analyze your connectivity and interface specifications to recommend the most suitable microcontroller. * Develop clean, well-documented firmware using PlatformIO or Arduino IDE, focusing on reliability and security. * Implement and test cloud connectivity with MQTT/HTTPS, including secure certificate handling. * Deliver a clear documentation package (read-me, pin mappings, library list, and build instructions). I would be glad to discuss details with you in private chat and show you how I can deliver a secure, reliable, and production-ready IoT bridge solution. Thanks, Mário Apolinario.

@Hemlingtong

Hi, I’m an experienced IoT developer and can build a secure IoT bridge firmware using the best-suited board (ESP32, Arduino, or Pico). It will feature reliable MQTT/HTTPS cloud connectivity with reconnection handling, and I’ll deliver clean source code, a brief README, and a demo log/video. I’ll also advise on any extra components or drivers required. Looking forward to working with you.

@Bhargav99786

Hi there, we provide iot solution , we provide end to end product solution , prototype design and pcb design , firmware development for controller as well as processor we have expertise team in hardware and software, connect us for more detail we will give brief timeline with cost we have already work with esp32, arduino, node mcu, in arduino ide as well as esp idf, we have also work in embedded linux. connect us . we share more detail.

@tommro

I'm an italian electronic engineer with more than 20 years of work experience. I work as HW designer and FW developer. As HW designer, I work in Altium, KiCad and Orcad and I have experience in development single MCU (Microchip PIC, ARM Cortex, ESP32) boards with several digital I/O (GPIO, UART, SPI, I2C, PWM,....) and some analog I/O. I design complete board: power section, MCU section, peripheral section,.... I design also boards with battery power; so I have experience in low power PCB design. I have also experience in commercial boards (Arduino, Raspberry, Beaglebone,...) shields design. I have also experience in bluetooth (both 2.0 and 4.0) PCB design. As FW developer, usually I work in C for Eclipse + GNU ARM GCC for different ARM Cortex M0/M0+/M3/M4/M33 manufacturers (STM32Fx, NXP, EFM32/EFR32 SiLabs, Nordic nFR5x, but I'm ready to learn new frameworks). I have also good experience with ESP32 in "esp-idf" framework. I work with both single task (baremetal) and multi-task environment (ThreadX, FreeRTOS, RTX,...). I write code for low level driver (GPIO, UART, SPI, I2C, PWM....) management, for medium level (driver for sensor, MEMS, memories, fuel gauge, display,...) and for high level/final application, for bootloader and for OTA. I have great experience in cloud communication with MQTT (FreeRTOS MQTTCore)/AWS (AWS IoT Core)/Azure protocol. I work also in "C code" commercial boards Arduino/Linux embedded commercial boards (Raspberry and Beaglebone).

@techhelp24x7

I have more than 15 years of experience in embedded domain and done lots of IOT project for big firm so I can handle this project more accurately please allow my to work on it