Wi-Fi Audio Recorder Prototype Development

@amelectronics

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.

@tshibsamuel477

Hi there, I carefully reviewed your ESP32-S3 Wi-Fi audio recorder requirements, including I2S MEMS audio capture, local storage, physical recording control, HTTPS upload, upload verification, automatic retry, and reliable handling of 1–2 hour recording sessions. I am a mechatronics engineer with almost half a decade of experience in embedded electronics, hardware prototyping, and digital interfaces including I2S, SPI, USB, SDIO, and related embedded systems. My background is well suited to integrating the ESP32-S3, microphone, storage, power, controls, and connectivity into a compact and reliable prototype. Because embedded hardware, digital audio interfaces, and system integration are already part of my skillset, I can approach the device efficiently while paying particular attention to audio quality, storage reliability, power integrity, and robust operation during network interruptions. Please send me a message so we can discuss the project and start. Best regards, Samuel tshibangu

@faizanmaqbool695

s an automation engineer with hands-on experience in Microcontroller programming, I can confidently say that I am adept at working with Raspberry Pi. I understand the technicalities involved and know how to leverage the full potential of this powerful tool. Being well-versed in PLC, HMI, SCADA programming, and designing automation systems–all skills crucial for this project–I am confident about my ability to deliver beyond your expectations. Moreover, my experience extends to troubleshooting and optimizing PLC programs which has equipped me with sharp problem-solving abilities needed for any urgent project. Being prompt and efficient is second nature to me. Thus, you can expect a fast turnaround without compromising quality. In summary, choosing me brings you someone who not only understands but excels in using Raspberry Pi accompanied by a determination to complete your project quickly and accurately. Let us work together to get your project done right!

@shivkantverma

Hi, Greetings! I am interested in working on your project. Please share the design details, specifications, and project requirements so we can discuss them further. I look forward to working with you. Thank you. Shivkant

@danish2051

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.

@CyberSasu

Hello, I’m Saswata Mukhopadhyay, and I specialize in electronics hardware and embedded software development. I can help you with microcontroller-based systems, sensor integration, circuit troubleshooting, firmware coding, and full hardware-software integration. My experience includes ESP32, STM32, Arduino, and Raspberry Pi projects, with a focus on real-world reliability and clean implementation. Whether you need a new product, prototype, or debugging support, I can provide a practical and dependable solution for your project.

@soniaer987

I have done similar work for the smart home device for elderly care which detects the wake word and person can interact with it. I have the ESP32 and MEMS Microphone with me so I will setup the test environment at my end. What I will provide: List of components Wiring diagram Firmware Working video

@hexabitzprojects

Hi, I can develop your **compact ESP32-S3 Wi-Fi audio recorder** with reliable local storage and upload/retry handling. I have **16 years of embedded and IoT R&D experience** with ESP32, C/C++, Wi-Fi, MQTT/HTTP, sensor acquisition, battery-powered devices and custom PCB development. I can implement: * ESP32-S3 with quality **MEMS/I2S microphone** * Physical start/stop recording control * WAV/PCM audio capture optimized for AI transcription * Local SD/flash storage with file management * HTTPS upload to your backend * Upload verification before deleting the local file * Persistent retry/queue mechanism after Wi-Fi or server failure * 1–2 hour meeting recording support * LED status indication for recording, upload, success and errors * Robust watchdog/recovery and power-management handling I have completed **IoT sensor/data-logging and wearable/embedded products**, and can handle the hardware/firmware integration, audio acquisition and backend communication. I’ll structure the firmware so recording remains reliable even when Wi-Fi is unavailable, with recordings safely retained until successful server confirmation. I can first review your backend API and required audio format, then finalize the storage, microphone and firmware architecture. Best regards, Subhash Suman ESP32-S3 | Audio | I2S | Wi-Fi | IoT | Embedded C/C++

@ThynkLoop

Hi, I can develop the ESP32-S3 Wi-Fi audio recorder prototype with a MEMS/I2S microphone, physical recording button, local audio storage, Wi-Fi/HTTPS upload, upload verification, retry handling, and LED status indicators. Proposed Approach: Configure ESP32-S3 with I2S MEMS microphone. Implement button-controlled audio recording. Store recordings locally for 1–2 hour meetings. Implement Wi-Fi and HTTPS backend upload. Delete audio only after successful upload. Add automatic retry when Wi-Fi/upload fails. Add LED status indication and final testing. Deliverables: ESP32-S3 firmware I2S microphone integration Audio recording and local storage HTTPS upload Retry/recovery system LED status indicators Source code and setup instructions

@alfatrade2

A 1-2 hour meeting at 16-bit/16kHz mono easily fills SPIFFS or a small SD card before Wi-Fi catches up if the connection drops mid-meeting, so I'd chunk recordings into rolling segments rather than one giant file — that also makes retry-on-failure cleaner since each chunk uploads and confirms independently. Do you already have the mic module picked, or is that part of what I need to spec? I've worked with prototyping and firmware for microcontrollers including sensor and driver control in C/C++ on RP2040-class hardware, so the I2S/upload logic is a natural extension of that.

@Wonitaf

Hi there, Imagine a compact Wi-Fi audio recorder that does everything you need and more. With my experience in developing ESP32-based systems, I can ensure your device will be reliable and efficient. I’ve successfully built IoT devices that integrate seamlessly with backends, so you can count on me to meet your expectations. I noticed you want to use a physical button for recording and LED indicators for various statuses. That’s a smart choice for usability. I understand how crucial it is for the recordings to be clear and suitable for AI transcription, and I’ll make sure the audio quality is top-notch. I specialize in ESP32 development and have hands-on experience with I2S audio, MEMS microphones, and REST APIs. I’m the right person for this project because I’m committed to speedy communication and a fast turnaround. Let me know if you are available for a quick chat! Regards, Wonita

@SoneJ

Hello, I understand you're looking to develop a compact Wi-Fi audio recorder prototype using the ESP32-S3. This project requires careful attention to audio quality and reliable data management, especially in ensuring successful uploads while managing local storage. My approach would involve designing the device to prioritize seamless operation, integrating a high-quality MEMS microphone, and implementing robust error handling for the upload process. I would also ensure clear LED indicators to enhance user experience. To better understand your needs, could you clarify the expected user interface for starting/stopping recordings? Additionally, what is your preferred method for backend integration regarding the upload process? Studio SJ works on paid fixed-price, milestone, or hourly engagements. Is that acceptable for you? Sone Joubert Studio SJ

@ostronik

Hi, Greetings from OSTronik India! We are a technology-driven company specializing in Power Electronics and Embedded System Design integrated with Artificial Intelligence (AI) and Mobile Application Development, delivering reliable, industrial-grade electronic and software solutions—from concept to mass production, all under one roof. Our in-house capabilities include R&D, Firmware Development, Hardware Design, Mobile Application(Android & iOS), Prototyping, and Scalable Mass Production, with a strong focus on quality, performance, and cost efficiency. Core Expertise: • Microcontrollers: PIC, STM32, ESP Family, AVR. • Microprocessors: Raspberry Pi • Development Tools: MPLAB X IDE, STM32CubeIDE, Arduino IDE, Atmel Studio, VS Code • Hardware Design: Industrial-grade multilayer PCBs using Altium Designer with optimized power design, isolation handling, and EMI/EMC compliance • Communication Protocols: UART, SPI, I²C, CAN, Modbus, MQTT, LAN, S-Bus, RS-485 Mobile Application Capabilities: • Custom Android & iOS mobile applications for device control, monitoring, and data visualization • Real-time dashboards, cloud connectivity, and secure user authentication • Seamless integration between IoT platforms and mobile apps We have successfully transformed multiple concepts into market-ready electronic and mobile-enabled solutions. We would be glad to share a brief reference video. Let’s schedule a meeting to discuss your requirements in detail. Best Regards, Team OSTronik India

@amulk9

Hello there, I’m Amul, an Embedded Systems & IoT Developer with 6+ years of experience building connected devices, ESP32 firmware, audio systems, and reliable Wi-Fi/API integrations. Your ESP32-S3 audio recorder is a strong fit for my experience. I can build the complete prototype using **ESP-IDF/C++, I2S MEMS microphone, SD/flash storage, Wi-Fi and HTTPS REST APIs**, with reliable offline handling and upload verification. Recently, I worked on an IoT device where recordings/data were stored locally during connectivity loss, automatically uploaded when the connection returned, and deleted only after successful server confirmation. I can handle: • ESP32-S3 firmware + button/LED controls • High-quality I2S MEMS microphone integration • 1–2 hour recording with efficient storage • HTTPS upload + retry/offline queue • Upload verification before local deletion • Clean, maintainable ESP-IDF/C++ code I’ll also optimize the audio format and storage flow specifically for **AI transcription and speaker diarization**, rather than simply recording raw audio. If you share your backend API details and preferred storage option (SD or flash), I can define the hardware/firmware architecture and get started. Best regards, Amul

@syedaliabbass1

As an experienced **ESP32/Embedded Systems developer** with a focus on **PCB Layout, Electronics, Firmware Development**, and more, I am ideally suited for your Wi-Fi Audio Recorder project. My extensive knowledge of **ESP32-S3, REST APIs, C/C++/ESP-IDF, I2S audio, MEMS microphones** along with my ability to navigate the intricacies of **Wi-Fi and IoT devices** make me confident in my capabilities for this task. I have successfully created similar audio/IoT hardware projects in the past where my solutions consistently deliver the desired functionality. I understand the importance of designing a device that not only captures audio effectively but also efficiently manages data storage and transmission. My experience will guarantee a prototype that not only meets your specifications but exceeds your expectations. Choose me for your Wi-Fi Audio Recorder Prototype development and you'll benefit from a professional who excels at problem-solving, optimizing complex algorithms, and transforming technical requirements into reliable implementations. I can't wait to put my skills to work and embark on this exciting project with you!

@laurentiuc2

Hi, I am an embedded systems engineer with strong experience in ESP32 firmware development and digital audio processing. I can develop the complete, rock-solid firmware for your Wi-Fi audio recorder prototype using the ESP32-S3 and an I2S MEMS microphone.  Regarding your request for similar audio/IoT experience: I have worked extensively with audio signal processing, including implementing Time Difference of Arrival (TDOA) algorithms for acoustic sound localization using hardware like ReSpeaker microphone arrays. I am highly familiar with handling raw I2S audio buffers and ensuring the high-fidelity capture required for AI transcription and diarization.  Here is how I will architect your device's firmware: Capture & Local Storage: I will configure the ESP32-S3 I2S interface for high-quality audio sampling. The audio chunks will be buffered and reliably written to local storage (SD card/Flash) to easily handle 1-2 hour continuous meeting recordings.  Fail-Safe Upload Logic: I will implement an HTTP/REST API client. The firmware will only delete the local recording after receiving a verified success response from your backend, and will automatically handle connection drops by queuing retries.  Hardware UI: I will implement non-blocking interrupts for the physical Start/Stop button and configure the distinct LED states (recording, uploading, success, error) to provide clear user feedback.

@shuvadeep003

Hey there, this ESP32-S3 recorder is a good fit for an embedded prototype involving audio capture, Wi-Fi communication, storage, and backend integration. I'm Shuvadeep, a full-stack developer working with a team experienced in Arduino, Raspberry Pi, IoT, REST APIs, and embedded development. The firmware can be structured around ESP32-S3 with an I2S MEMS microphone, local storage for meeting recordings, HTTPS upload with confirmation, retry handling, and safe deletion only after successful upload. For 1-2 hour recordings, I'd pay particular attention to audio format, storage capacity, buffering, power/memory usage, and reliable Wi-Fi recovery so a temporary connection failure doesn't lose the recording. LED states and the physical recording button can be kept simple and deterministic. I don't want to claim a specific previous audio-recorder project that I haven't provided. If you can share the intended MEMS microphone and storage setup, I can assess the hardware constraints before implementation. Best regards, Shuvadeep

@johny0903

Hi — CS + electronics (AVR/Atmel background, ESP32 bench now: PlatformIO/Arduino, soldering station, meter). M1 = architecture + bring-up plan: mic/ADC or I2S, Wi-Fi upload, storage, power (bench prototype — not a PCB factory run). M2 = firmware MVP + README. Share board / mic part / sample rate for fixed quote or $35/hr. Ukraine remote (Kyiv).

@paulpham93

An ESP32 Wi-Fi audio recorder is a comfortable fit: I handle ESP-IDF firmware, I2S microphone capture, and REST endpoints for upload and file listing. For this budget I propose a first milestone covering working hardware, stable recording, and wireless transfer to a local endpoint. My Upwork profile has earned over $300,000 on Upwork with account Paul.P. Best regards, Paul.