Embedded Systems / Firmware Engineer

@MuhammadUzair16

HAPPYMAT. Hi, I am an embedded systems engineer with over 16 years of experience developing physical electronic products, embedded firmware, sensor interfaces, wireless connectivity, and hardware/firmware integration. One relevant prototype I personally helped build was an ESP32-based connected sensing device with pressure inputs, addressable RGB LEDs, a digital display, Wi-Fi/BLE communication, and audio peripherals. I developed the C/C++ firmware, integrated and calibrated the sensors, implemented LED/display control and wireless communication, prepared the wiring documentation, and supported board bring-up, soldering, debugging, and full-system testing. The project cannot be shared publicly because of confidentiality obligations, but I can show supporting photos or video privately where permitted. For HappyMat, I can take ownership of the embedded controller and firmware, integrate the listed peripherals, coordinate closely with the IoT/interface engineer, and troubleshoot issues through prototype testing. I will provide organized source code, build configurations, pin mappings, and wiring/integration information. I can also advise on hardware improvements and production readiness as the prototype develops. I am comfortable signing an NDA and participating reliably in team integration. Has the ESP32 variant, display, pressure sensor, and camera/audio hardware already been selected? Please contact me to discuss details.

@AITSoft

HAPPYMAT Hi, I understand you need firmware for the first HappyMat prototype, including the embedded controller, pressure or presence sensors, addressable LEDs, display, Wi-Fi, and BLE. I can help connect the electronics, write and test the firmware in C Programming for an ESP32 or similar Microcontroller, and troubleshoot the full Hardware/Firmware Integration during testing. I will also support the camera, speaker, and microphone connections where they communicate with the controller, while keeping the code and wiring information clear for the wider engineering team. I have worked on physical electronics prototypes involving controller firmware, sensor inputs, output devices, and hardware testing. I can share relevant project evidence where available and will provide the project-specific source code, configuration files, and wiring details. I am also comfortable working under an NDA and coordinating reliably with the IoT/interface engineer. Which ESP32 board, sensor hardware, LED protocol, display, and camera/audio interfaces are already selected for Prototype #1? Please confirm the exact controller board, sensor type, LED type, display model, and the expected camera/audio interfaces so I can plan the firmware structure and integration tests correctly. Thank you.

@cpp2048

HAPPYMAT > I saw you posted 3 kinds of work, prototype testing, firmware development as well as hardware designs. You will get everything in me. Discuss in details and I think I could be perfect match for all your assistance.

@tshibsamuel477

Hi there, HAPPYMAT — I carefully reviewed your Embedded Systems / Firmware Engineer role for Prototype #1, including the embedded controller, pressure/presence sensing, addressable LEDs, digital display, Wi-Fi/BLE connectivity, and integration of camera, speaker, and microphone hardware. I am a mechatronics engineer with almost half a decade of experience in embedded electronics, PCB design, hardware prototyping, sensors, and interfaces such as UART, USB, SPI, I2C, I2S, and related embedded systems. My background is particularly relevant to integrating real physical hardware, debugging electronics, and coordinating communication between sensors, peripherals, and embedded controllers. Because embedded hardware, electronics integration, and prototyping are already part of my core skillset, I can contribute efficiently to controller integration, peripheral bring-up, troubleshooting, wiring documentation, and coordination with the IoT/interface and other engineering team members. I am also comfortable working under an NDA. Please send me a message so we can discuss the project and start. Best regards, Samuel tshibangu

@tetianam8

HAPPYMAT ⭐️⭐️⭐️⭐️⭐️ Hi, I’m interested in working on HappyMat Prototype #1, particularly the firmware and hardware integration side. For HappyMat, I can develop the embedded firmware and integrate the controller with the pressure/presence sensors, addressable RGB/RGBW LEDs, display and Wi-Fi/BLE connectivity. I can also support the camera/audio interfaces and troubleshoot firmware and electronics together during prototype integration. My approach would be: • Establish the hardware/firmware architecture • Implement sensor and peripheral drivers • Develop LED and display control • Configure Wi-Fi/BLE communication • Integrate and debug the physical hardware • Test functions and deliver source/configuration/wiring documentation I’ll coordinate closely with the IoT/interface engineer so the hardware control protocol remains simple and reliable. I’m also comfortable working under NDA and participating in integration testing with the wider HappyMat team.

@DrSyafiq

The brief is clear; I’d prove the critical path first, then expand from working evidence. For a Firmware Engineer for HappyMat Prototype, the hard part is balancing sensor scanning accuracy, battery life, Bluetooth/SIM fallback, and OTA-ready embedded reliability. My approach would be to validate the sensor matrix and power budget first, then design the acquisition PCB, embedded firmware, connectivity fallback, and OTA/admin controls in staged prototypes. Quick question: Which external integrations are absolutely required for MVP, and which can be staged after launch? Also, what is already available for Firmware Engineer for HappyMat Prototype: a working codebase, designs, data, or only the brief? Best, Dr. Syafiq

@elect2eng

I have following skills. 1. hardware design using microcontroller , sensors, interfacing circuits. I have done some research on how to sense pressure . it looks like you need this information. I have good skills to program microcontroller such as esp32,stm and PIC

@sakshis576

As someone who's immersed in both the digital and physical aspects of engineering, I am confident that my skills make me an excellent fit for the Firmware Engineer role at HappyMat. With an innate understanding of hardware and software integration, I'll not only deliver a seamless firmware solution, but also collaborate perfectly with the entire team. I've been fortunate enough to assist in the development of numerous electronic prototypes before – providing focused attention to detail that results in robust solutions each time.

@corpmember29

HAPPYMAT Embedded Systems / Firmware Engineer {{{ I HAVE CREATED SIMILAR EMBEDDED AND IOT SOLUTIONS BEFORE AND I CAN SHOW YOU }}} I have 11+ years of software/embedded development experience and can handle the firmware and hardware integration for HappyMat Prototype #1. I can work with ESP32/MCUs, Embedded C/C++, pressure/presence sensors, addressable RGB/RGBW LEDs, displays, Wi-Fi, BLE and peripheral integration, including camera, speaker and microphone interfaces. Physical hardware example: [ADD YOUR REAL HARDWARE/IoT PRODUCT + YOUR EXACT CONTRIBUTION + PHOTO/VIDEO LINK] I will handle firmware development, sensor/LED/display control, wireless communication, hardware debugging, integration testing and provide the required source code, configuration and wiring documentation. I understand this is a fixed $700 scope and can coordinate directly with the other HappyMat engineers during integration. NDA is acceptable. Thanks, Christina

@shivkantverma

HAPPYMAT Hi, Greetings! I am interested in working on your project. Could you please share the design details and technical requirements so we can discuss the project scope and key parameters in detail? I look forward to working with you. Thank you! Shivkant

@sekai1116

HAPPYMAT ✅ Nice to meet you ✅ I’m interested in supporting HappyMat as the Embedded Systems / Firmware Engineer. I can develop the embedded control system around an ESP32 or comparable MCU, integrating the sensors, addressable LEDs, display, wireless connectivity, and supporting hardware into a reliable working prototype. I can handle firmware development in C/C++, including pressure/presence sensing, LED control, display communication, Wi-Fi and BLE functionality, while keeping the system structured for future integration with the camera, microphone, speaker, and IoT interface. My approach would be hands-on and integration-focused: configure the hardware, develop and test each subsystem, then bring everything together while troubleshooting communication, timing, sensor readings, power, and firmware issues discovered during physical testing. I can also provide the source code, configuration files, wiring information, and relevant documentation needed by the rest of the engineering team. I’m comfortable collaborating with the mechanical, electronics, fabrication, and IoT team members throughout prototype integration and final testing. I’m also ready to work under the required NDA before receiving confidential HappyMat information.

@jfsimon1981

Good morning, i'll be quoting on your project including drivers & integration budgetary based on your above spec. Keep in touch, Regards Jean-François

@SkillCrafts

I've successfully developed similar embedded systems for IoT devices requiring real-time sensor fusion and wireless connectivity, including a project that managed addressable LED arrays and a small digital display for user feedback. My approach to the HappyMat prototype will leverage this experience to ensure robust and efficient firmware. My technical strategy will involve using an ESP32-S3 microcontroller due to its integrated Wi-Fi, ample processing power, and GPIO capabilities. I'll develop the firmware in C/C++ using the ESP-IDF framework, focusing on a modular design. This will include drivers for the pressure sensors (e.g., FSRs interfaced via an ADC), a dedicated library for controlling the addressable LEDs (e.g., WS2812B), and a driver for the digital display (e.g., I2C-based OLED). The Wi-Fi implementation will focus on a stable connection for potential future data logging or over-the-air updates. To best align with your immediate needs, could you clarify the specific type and resolution of the pressure sensors you're considering? Also, what are the primary communication protocols expected for the Wi-Fi integration? I'm eager to discuss how my expertise can rapidly bring the HappyMat prototype to life.

@bojans9

HAPPYMAT Hi, Bojan here, from Serbia. Building your firmware for HappyMat prototype with Bluetooth is doable; what matters most is a device that behaves the same in the field as on the bench. I'm a senior embedded and electronics engineer with 8+ years of experience working with Embedded Systems, Bluetooth, Microcontroller and Electronics. For your firmware, the real challenge is timing, power and real conditions. A common issue: testing only on the bench, so problems appear once the device runs in real conditions. My plan: first, review the schematic, pin map and timing requirements. Then, write the firmware in small modules, each tested on the board. Finally, test on the real hardware under load, power loss and bad signal. I've done firmware work in Bluetooth, so I check early for timing issues and power drops. A few questions to better understand the scope: 1. Should firmware update over the air? That needs a safe bootloader planned from the start. 2. Log raw readings during testing? I'd recommend it, to compare against a reference. 3. Is this heading to production after the prototype? Then parts and code stay ready for production. I can start right away. Happy to go over the details here in chat and suggest the best approach. Looking forward to hearing from you, Bojan

@intelliresponse

HAPPYMAT Hi, I’m interested in working on the HappyMat prototype. I have hands-on experience with embedded systems, microcontrollers, sensors, LEDs, displays, and hardware/firmware integration. I can help with the ESP32 firmware, pressure/presence sensing, addressable LEDs, display, Wi-Fi/BLE, and integration/testing with the camera, speaker, and microphone. I’m comfortable troubleshooting both hardware and firmware and can provide the source code, configurations, and wiring documentation. I’m also comfortable working with the rest of the engineering team and under NDA. I’d be happy to discuss the prototype requirements and get started.

@mayr81

HAPPYMAT I can contribute to HappyMat Prototype #1 by developing reliable embedded firmware around an ESP32-class controller, integrating pressure/presence sensing, addressable RGB/RGBW LEDs, display control, Wi-Fi, BLE, and coordinated camera, speaker, and microphone interfaces. My approach would emphasize a clean hardware-abstraction layer, modular device drivers, robust event/state handling, communication diagnostics, and integration-ready source code. I would also support wiring validation, soldering and electronics troubleshooting, bench testing, and systematic debugging across the controller and connected peripherals. For a physical prototype, I have worked on connected embedded hardware where I contributed to the controller firmware, sensor and peripheral integration, wireless communications, device behavior, and integration testing. I can provide relevant project evidence and document the resulting firmware configuration, source code, interfaces, and wiring information as required. I’m comfortable collaborating with multidisciplinary engineering teams, working under NDA, communicating consistently, and resolving issues during prototype integration. The goal would be a dependable, well-documented firmware foundation that the broader HappyMat team can test and extend confidently. Available to begin with the architecture and hardware interface review.

@xintian923

Hello, I'm an embedded engineer working mainly with ESP32 / ESP-IDF on real, physical products: custom PCBs, bring-up, sensors, displays, wireless, and field debugging. Your Prototype #1 scope (controller, pressure/presence sensing, addressable LEDs, display, Wi-Fi/BLE, camera/audio support) is very close to the work I do every week. One physical product I personally helped build: Jacuzzi / Spa Controller (ESP32, deployed in the field) This is an ESP32-based controller for a commercial spa system. It is installed, commissioned, and running on-site, not a bench demo. My contribution was the complete controller firmware (ESP-IDF 5.x, currently in its third major version): I/O and actuators: 16-channel DI/DO relay module control for pumps, heaters, and valves. Sensor integration: 4–20 mA analog inputs, plus Modbus RTU sensors for pH, ORP, temperature, turbidity, EC/TDS, and flow. This included polling, timeouts, fault detection, and sensor-loss handling. Display / HMI: LVGL-based touch screens for operators, covering live readings, setpoints, alarms, and manual control. Connectivity: Wi-Fi telemetry and RPC to a ThingsBoard backend, paired with a Flutter mobile owner app (Android/iOS) that I also built. Field support: When the site reports a fault (for example, an output that won't switch on), I trace the root cause across wiring, I/O module, and firmware, ship the fix, and write operator instructions. Best regards, XinTian Li

@hexabitzprojects

HAPPYMAT Hi, I can develop the **ESP32-based embedded firmware and hardware integration** for HappyMat Prototype #1. I have **16 years of hands-on embedded and electronics R&D experience**, with extensive work on ESP32, sensors, displays, addressable LEDs, Wi-Fi, BLE and physical IoT products. One directly relevant type of product I have personally built is an **ESP32 touchscreen automation controller**, where I handled firmware, real-time sensor/actuator control, display UI, GPIO integration and wireless communication. I have also worked on compact IoT devices, wearable electronics and sensor-based products. For HappyMat, I can handle: * ESP32/ESP32-S3 controller configuration and firmware * Pressure/presence sensor integration * RGB/RGBW addressable LED control * Digital display interface * Wi-Fi and BLE connectivity * Camera, speaker and microphone interface support * Non-blocking firmware architecture and reliable state handling * Hardware/firmware debugging and integration testing * Wiring/interface documentation and complete source-code handover I’m comfortable working directly with physical hardware, using test equipment for bring-up and coordinating closely with the mechanical, electronics and IoT team members. I can provide relevant prototype evidence where available, subject to confidentiality/NDA. Best regards, Subhash Suman ESP32 | Embedded C/C++ | IoT | Sensors | LEDs | Wi-Fi | BLE | Hardware Integration

@alfatrade2

HAPPYMAT. On Prototype #1 I would bring up the controller firmware around pressure/presence sensing, addressable LED patterns, and the digital display, then deliver source and wiring notes for the joint integration. My hardware firmware is C/C++ on RP2040 with sensors and drive control, so simultaneous Wi-Fi plus BLE and the camera, speaker, and mic path are a gap I have not closed. Which radio and display bus are already committed on the board?