Microcontroller Jobs

I need a compact, single-board solution that combines a Raspberry Pi Zero 2 W, its camera module, an ADXL accelerometer, and a TP4056 charging circuit able to supply a steady 2 A for display unit. The board’s primary job is continuous video recording/streaming while remaining fully portable, so the power stage must keep the Pi and camera running for at least six hours on a 3 00 mAh Li-ion pack (or any cell that realistically meets that runtime). Layout considerations • Keep the Pi’s CSI ribbon connector, mini-HDMI, USB OTG, micro-SD slot and 40-pin header accessible. • Route the ADXL close to the board edge to minimise vibration damping. • Provide status LEDs for charge, power-good and recording. • Respect the TP4056 thermal requirements and add pro...

I have an on going project with STM32U5G9ZJT6Q on one of my Host board. The Host PCBA is connected to an external display via parallel interface. Currently its working with a different display but we would like to update the GUI compatible with a new LCD that we purchased (CH430WV11A-CTB). The milestone descriptions is as follows: 1. Update the Host firmware to support and integrate the new Chinese LCD CH430WV11A-CTB (). All the new assets of the UI have been adjusted already according to the new display. 2. Add additional new screens from the latest link provided by us and use the latest assets for the update. 3. Follow the “CO.8 - STM Board Set 1st Firmware Review_08082025” document for firmware updates and fixes to the GUI. 4. Enable Haptic motor function when scrol...

I need an experienced hardware engineer to design a robust, automotive-grade PCB built around an STM32H7 microcontroller. This board will function as a drivetrain/traction-control module and must meet high reliability, EMI, and durability standards for use inside a vehicle environment. The enclosure and connector/header layout are already defined and must be followed for mechanical fit. No schematics exist yet — this is a complete design from scratch. --- Required Features Core MCU STM32H7 series with 2× native CAN FD Support for 3rd CAN FD bus via external SPI CAN FD controller Analog switch to optionally bridge the two native CAN FD buses (programmable link/isolated mode) Connectivity ESP32 module for wireless support STM32 ↔ ESP32 communication (UART/SPI) USB p...

We are a USA-based audio company with over 50 years of industry experience, seeking a highly skilled Digital Engineer to join our team full-time. This is a long-term position (years, not months) supporting ongoing projects in collaboration with our local engineers in Canada and the USA. The ideal candidate will work North American hours (flexible if needed) and possess expertise in embedded systems development. Mandatory Skills: 1. Proficiency in MCUXpresso IDE (FreeRTOS) for NXP embedded platforms. 2. Experience with Atmel Studio for Atmel AVR programming (C or machine language). 3. Familiarity with JTAG, USB, PHY, MIPI, I2C, and SPI protocols. Nice-to-Have Skills: 1. Knowledge of Arduino programming. 2. Experience with legacy Microchip programming for product support. 3. Passion for h...

I have an early-stage prototype of our in-house AI voice assistant and a clear spreadsheet listing every connector, interface and mechanical constraint we must respect. What I now need is a production-ready custom PCB that folds all of those pieces into a compact, reliable board dedicated to a voice-first device. Core features the board must accommodate include voice recognition processing, high-quality audio playback, robust wireless connectivity (Wi-Fi and Bluetooth), a beam-forming microphone array, a small display ribbon connector, and a camera interface. Size, heat dissipation and low-noise routing around the microphones are especially important, so experience with mixed-signal layout and RF coexistence is a plus. The schematic is partially drafted, component selections are frozen, ...

I am seeking a highly skilled embedded developer to build a minimal RTOS-based flight controller firmware for an STM32 microcontroller. This project focuses on creating a stable, real-time stabilization flight controller, not a full autopilot system. Key Requirements: Develop the firmware from scratch using FreeRTOS or Zephyr, including: Core Flight Controller Functions IMU sampling via SPI at 1 kHz Sensor fusion using Mahony filter (200–500 Hz) PID stabilization loops for Roll, Pitch, and Yaw Mixer + motor outputs using PWM or DShot (400–480 Hz) RC input handling via SBUS or CRSF UART logging + basic failsafe mechanisms Clean, modular RTOS task architecture with deterministic timing Low-latency, robust, and stable performance Power & Telemetry Support (Required or Option...

I want to turn my concept for an urban-water clean-up robot into a tangible, working system that can patrol canals or reservoirs and scoop up whatever floats in its way. The robot must run on autonomous, pre-defined routes—think of it moving along waypoints I upload rather than being steered in real time—so reliable path-following logic is crucial. Because the debris in these waterways is rarely sorted, the collection mechanism has to cope with mixed waste: plastics, leaves, stray packaging, even the occasional food scrap. Here’s what I need from you: a complete solution that covers the mechanical layout, sensor suite, navigation electronics, and the software that ties everything together. I’m open on the exact hardware platform (ROS, Arduino, Raspberry Pi, Jetson,...

I want to turn my concept for an urban-water clean-up robot into a tangible, working system that can patrol canals or reservoirs and scoop up whatever floats in its way. The robot must run on autonomous, pre-defined routes—think of it moving along waypoints I upload rather than being steered in real time—so reliable path-following logic is crucial. Because the debris in these waterways is rarely sorted, the collection mechanism has to cope with mixed waste: plastics, leaves, stray packaging, even the occasional food scrap. Here’s what I need from you: a complete solution that covers the mechanical layout, sensor suite, navigation electronics, and the software that ties everything together. I’m open on the exact hardware platform (ROS, Arduino, Raspberry Pi, Jetson,...

Quiero llevar STICK, mi asistente de inteligencia artificial físico-emocional, de la idea al prototipo funcional. El corazón del dispositivo será un ESP32-S3, así que necesito a alguien que domine tanto el firmware como la parte electrónica. El reto inmediato es el desarrollo de firmware: habilitar conectividad Wi-Fi y Bluetooth, gestionar la captura y el procesamiento en tiempo real de datos de varios sensores, y dejar puntos de expansión listos para futuros actuadores. Trabajo normalmente con ESP-IDF, pero acepto propuestas sólidas basadas en Arduino o PlatformIO si justifican mejor velocidad de desarrollo. Además del código, requiero los archivos de diseño electrónico (esquemático y, si es viable en es...

I'm looking for an experienced firmware developer to create firmware for IoT devices. The primary functionalities required are sensor integration and wireless communication, specifically using the Wi-SUN protocol. Experience with Silicon Labs Simplicity Studio is a requirement. Key Requirements: - Develop firmware for IoT devices - Integrate various sensors - Implement Wi-SUN wireless communication - Ensure robust and reliable performance Ideal Skills: - Experience with IoT firmware development - Proficiency in sensor integration - Expertise in Wi-SUN protocol - Strong background in embedded systems and microcontrollers Please provide relevant experience and examples in your bids.

I am building a proof-of-concept robot for a government brief and need someone who can take the project almost to completion—hardware assembly plus all the code. Core functions The model has to spot potholes, measure local AQI, recognise severe impacts that suggest an accident, and automatically trigger a door-opening servo. All captured events must travel long-range to an Android APK without relying on Bluetooth; GSM, LTE or any other SIM-based link is acceptable. If a crash is confirmed the robot must also place an automated voice call to an emergency number. What I already have • Concept sketches and a basic parts list • Space allocated for three sensor blocks: pothole, AQI and accident detection Everything else—wiring, microcontroller choice, enclosure tweak...

I need a skilled hardware design engineer to take concept from rough idea to a production-ready schematic. The device sits in the consumer-electronics space and will rely on a precise blend of microcontrollers, processors, assorted environmental sensors, and a reliable communication module for wireless control. What I expect: translate the functional requirements I will share into a full hardware architecture, select components that balance cost and availability, and capture everything in a clear, industry-standard schematic (Altium, KiCad or similar is fine—tell me what you prefer). Deliverables • Complete schematic with labeled nets and reference designators • Recommended microcontroller, sensor and radio part numbers with preliminary BOM • Brief design no...

I’m putting together a side-by-side document that captures both the “as-is” (IMO) and the “to-be” (FMO) view of two network-monitoring platforms—Netbrian and UTG. The spotlight is squarely on their monitoring and alerting capabilities because that is the area that will ultimately drive our tooling decision. Here is what I need from you: • A thorough, feature-level comparison focused on the monitoring and alerting stack. Please walk through: – Graphical view of network status (Netbrian’s live circuit-down visualization is the benchmark). – Notification methods, specifically email and SMS. – Options for setting customizable alert thresholds. • For each feature, break the content into two clear parts: &...

I'm looking to develop a pothole detection robot. The robot needs to: - Detect and map potholes - Send real-time alerts via a SIM card The robot will operate primarily on urban roads. Ideal skills and experience include: - Robotics development - Experience with Arduino - Proficient in mobile network integration - Coding expertise for real-time alert systems Looking forward to your bids!

I'm looking for a skilled C programmer to implement I2C communication for interfacing with microcontrollers. The project will involve: - Data read/write - Device configuration - Error handling Please suggest suitable microcontrollers for this task. Ideal skills include: - Proficiency in C programming - Experience with I2C protocols - Familiarity with microcontrollers and their configurations - Strong problem-solving skills for error handling Looking forward to your proposals!

Assalam o alaikum, I am looking for electrical engineers only from Pakistan to work on final year projects starting from proposal to finishing with final design, simulation and report writing with zero plagiarism. (use of chatGPT highly prohibited). I am looking for experts who can deal FYP related to following domains of electrical engineering: Power Systems / Renewable energy systems Control Systems Signal Processing Instrumentation Engineering Internet of things Freelancers must be proficient with following: • Arduino/Raspberry Pi • FPGA | Verilog/VHDL • Proteus | TinkerCAD • Multisim | LabVIEW • MATLAB/SIMULINK & Python ***MOST IMPORTANT*** Applicants should be proficient in technical report writing and must have good command over p...

I need a Python-savvy embedded engineer to create the core firmware for an industrial automation controller focused on process control. The microcontroller—Raspberry Pi running a minimal RTOS—already boots and exposes basic drivers; your job is to build the application layer in MicroPython (with small C modules if timing demands it). The code must read multiple sensors, execute PID loops, drive valves and relays, log key variables, and expose a simple text-based API so the supervising PLC can tweak setpoints on the fly. Timing is critical: the main control loop has to hold a deterministic 10 ms cycle without blocking other tasks. Safe startup/shutdown, EEPROM-backed parameter storage, and watchdog handling also form part of the brief. You’ll receive the board schematic, ...

I need a Python-savvy embedded engineer to create the core firmware for an industrial automation controller focused on process control. The microcontroller—Raspberry Pi running a minimal RTOS—already boots and exposes basic drivers; your job is to build the application layer in MicroPython (with small C modules if timing demands it). The code must read multiple sensors, execute PID loops, drive valves and relays, log key variables, and expose a simple text-based API so the supervising PLC can tweak setpoints on the fly. Timing is critical: the main control loop has to hold a deterministic 10 ms cycle without blocking other tasks. Safe startup/shutdown, EEPROM-backed parameter storage, and watchdog handling also form part of the brief. You’ll receive the board schematic, ...

Title: High Voltage Driver & Startup Circuit for Neon/Plasma Tube Lighting Description: I’m looking for an experienced electronics engineer to design a high voltage driver and startup circuit for a neon/plasma tube (LT‑2 or equivalent) used in a lighting project. The project involves DC-DC voltage conversion, microcontroller-based control, and monitoring for startup and full-power operation. Project Requirements: Input voltage: 12V–24V DC Output voltage: ~500V DC steady-state, with strike pulses up to ~600–700V Tube startup: low-light “warm-up” mode with gradual ramp to full brightness Microcontroller interface (ATmega328p) for: PWM strike control Voltage and current monitoring via ADC Optional 1” I²C OLED display for status Adjustab...

Quiero el firmware completo para nodos esclavos de un sistema distribuido que utiliza LoRaWAN. Los esclavos con la placa heltec cubecell ab02s (htcc-ab02s) que soporta IDE Arduino, que se comuniquen por LoRa de forma bidireccional con el maestro. Y para el maestro que es una Raspberry Pi con Node-Red y desde ahí se comunica con los esclavos. Funciones de los esclavos • Medición periódica de caudalímetros que utilizan rs485 y entradas rápida/interrupciones. • Acción sobre electroválvulas. • Configuración de parámetros internos, tiempos de modos sleep, alertas cuando la temperatura supere o baje de los umbrales definidos, gestión de batería... Requisitos del maestro • Crear y gestionar las tra...

Saya ingin mewujudkan sebuah sistem keamanan rumah pintar sederhana yang memanfaatkan deteksi gerakan untuk langsung mengaktifkan alarm. Perangkat keras utama sudah saya siapkan—sensor PIR, papan Arduino / ESP32, LED atau buzzer sebagai indikasi alarm, serta kabel jumper. Yang saya butuhkan adalah rangkaian lengkap berikut firmware sehingga ketika sensor mendeteksi gerakan, alarm menyala secara andal dan responsif. Lingkup pekerjaan mencakup: • Perancangan skema rangkaian sensor PIR ke Arduino / ESP32 • Penulisan kode Arduino (C/C++) yang membaca input gerakan lalu memicu alarm • Penjelasan singkat di dalam kode agar mudah saya kembangkan lebih lanjut • Panduan pemasangan ulang serta daftar komponen apa adanya (tidak perlu desain PCB, cukup breadboard) Pr...

The hardware circuit design and hardware implementation of a voltage adder cell (VAC) integrated with a classical DC–DC boost converter using a SiC MOSFET switch. The converter is designed to operate with an input voltage of up to 100 V. The proposed non-isolated topology incorporates a dynamic duty-cycle-dependent VAC consisting of an inductor, two capacitors, and a diode. When embedded within a boost-derived structure, the VAC delivers additional energy to the output during the OFF state of the switch, leading to a progressive increase in voltage gain. Some of the important observations in this work include the voltage stress across the passive components, the output performance of the converter—especially its ability to achieve a higher voltage gain and the thermal behavior...

For the last two decades our in-house controller has powered a proprietary induction bonder. The time has come to modernise it. I already know the behaviour I want, but I no longer have an electrical engineer on staff, so I need someone who can translate my functional notes into a production-ready circuit board. Project goals • Replace the ageing microprocessor with a current-generation device that gives us more headroom for future firmware and features. • Fold in several improvements we have identified over years of field use. Design Overview: - Built in inductive value check - Built in temperature controller - Works on 220VAC single phase - Digital serial number - Fast heat up time - RJ45 connector for communication, use Modbus TCP - One connector for input p...

I need Arduino code uploaded to an ESP32-S3 Touch LCD 5B microcontroller. Ideal skills and experience: - Proficiency in Arduino programming - Experience with ESP32-S3 microcontrollers - Familiarity with touch LCD interfaces Please provide a brief overview of your relevant experience.

I'm seeking an experienced Arduino developer to create an automation system for industrial purposes. Key Requirements: - Develop and implement Arduino code for automation tasks - Integrate sensors and actuators - Ensure system reliability and efficiency Ideal Skills and Experience: - Proficiency in Arduino programming - Background in industrial automation - Strong problem-solving skills - Ability to showcase past work in similar projects Please include examples of your past work in your application. Can you help me with arduino project (uno)? We made a zeppelin, 1 bldc for up and down (is mounted on underside anti clockwise), 2 bldc in the back for forward movement and left and right (when i move joystick to left the engine on right should increase thrust and vice versa). We use ...

Urgent Hire: Embedded Systems Engineer (Fritzing/Eagle & Internet Calculator Project) We are immediately seeking an Embedded Systems Engineer for a long-term contract, starting with a crucial project: designing an Internet-connected Calculator prototype. Key Project & Skills Focus: Initial Project: Design and validation of an Internet-Connected Calculator (Arduino/ESP based). Software Proficiency is a Must: Expert knowledge of Fritzing for prototyping and Eagle (or similar tool) for professional schematic and PCB design is essential. Calculator Logic & Interface: Understanding the electronic requirements and component selection for calculator-type devices (keypads, displays, logic). Connectivity: Experience integrating Wi-Fi/Internet modules (e.g., ESP8266/ESP32) for data r...

I am looking for an experienced hardware engineer to design a small custom PCB that includes: Required Electronics 1. Low-power Microcontroller • Must support 1 capacitive-touch / proximity sensing input (simple on/off state). • Ultra-low power consumption is required. 2. NB-IoT / LTE-M Modem • Preferred modules: SIM7080, SIM7000, BC66, BC95, SARA-N series, or any equivalent you recommend. • Must support eSIM or iSIM provisioning (no physical SIM slot required). 3. eSIM / iSIM Support • The board must include: • Either: an embedded eSIM footprint (MFF2 package) • Or: use an NB-IoT module with integrated iSIM • I will provide the eSIM EID for network activation during testing. 4. Power System • Powered by CR2032 coin cell OR a small...

I need to interface two 8K IP cameras into an AMLCD display. The cameras use Ethernet for data transfer. Requirements: - Experience with IP camera and display integration - Knowledge of handling 8K video resolution - Proficiency in Ethernet connectivity and configuration - Familiarity with AMLCD display setup and interface Ideal Skills: - Background in video processing and display technologies - Technical expertise in networking and IP configurations - Previous projects involving high-resolution camera integration Please provide relevant experience and approach in your bids.

I need a solution to control a P10 HUB12 LED panel for digital signage using a Raspberry Pi and. The setup will involve multiple panels. Key Requirements: - Use of Raspberry Pi - Multi-panel configuration Ideal Skills and Experience: - Proficiency with Raspberry Pi - Experience with Hzller library - Knowledge of LED panel configurations, especially multi-panel setups - Background in digital signage applications Looking for a freelancer who can deliver a reliable and efficient control system for my LED signage.

I’m building new firmware on an NXP series board and I now need a clean, reusable I2C driver that works in both Master and Slave modes. The core of the task is to provide well-structured, fully-documented C source that drops straight into my current project and handles all standard transactions—start, repeated start, stop, read, write, and error recovery—without me having to touch low-level registers again. What I already have • Tool-chain set up and running (MCUXpresso / GCC). • Pin-mux and clock configuration in place. • A test harness ready to exercise the driver on real hardware. What I need from you 1. Source and header files implementing the driver for the selected LPC MCU family. 2. Simple API layer so application code can queue transfers...

Possuo uma Waveshare ESP32-S3-Touch-LCD-7 e quero levar a interface do meu sistema MetriFit para este hardware usando LVGL. O sensor de distância VL53L1X já está validado no barramento I²C; o que preciso agora é o software que una tudo em uma única aplicação. Fluxo de uso que espero • Tela em estado neutro, tema escuro e moderno como padrão. • Ao primeiro toque na área indicada, entra em modo de calibração: o usuário move o sensor até o ponto mais baixo (p0), depois até o ponto mais alto (p1). Esses extremos são gravados automaticamente. • Com p0 e p1 definidos, o gauge horizontal deve reagir em tempo real (latência perceptível <50 ms) ao desloc...

I’m looking to drop a plug-and-play CANopen stack straight into an STM32F103ZET6 design. The goal is a clean, well-documented C library—no external licensing surprises—that exposes full SDO, PDO and NMT functionality over the on-chip bxCAN peripheral and runs at 125 k, 250 k and 1 Mbit/s without code changes. Please base the demo on a standard STM32CubeIDE (or Keil uVision) project so I can flash it immediately on a Nucleo-F103ZET or my own board. The demo should: • Initialise CAN, bring the node online and answer NMT commands • Read/Write a handful of test objects over expedited SDO transfers • Produce and consume at least one RPDO/TPDO pair at 10 ms • Expose an EDS file that matches the object dictionary used in code Acceptance: the projec...

I’m looking to drop a plug-and-play CANopen stack straight into an STM32F103ZET6 design. The goal is a clean, well-documented C library—no external licensing surprises—that exposes full SDO, PDO and NMT functionality over the on-chip bxCAN peripheral and runs at 125 k, 250 k and 1 Mbit/s without code changes. Please base the demo on a standard STM32CubeIDE (or Keil uVision) project so I can flash it immediately on a Nucleo-F103ZET or my own board. The demo should: • Initialise CAN, bring the node online and answer NMT commands • Read/Write a handful of test objects over expedited SDO transfers • Produce and consume at least one RPDO/TPDO pair at 10 ms • Expose an EDS file that matches the object dictionary used in code Acceptance: the projec...

I’m taking Kalkini’s smart ring from idea to mass production and need a single engineer who can own both the hardware and the embedded code. On the hardware side you’ll architect the board around low-power sensors, an efficient micro-battery solution, and reliable BLE connectivity. On the firmware side you’ll bring those components to life so the ring tracks health metrics, pushes discreet notifications, and syncs seamlessly with our mobile app. Deliverables I’m expecting: • Schematic, PCB layout, and BOM ready for manufacturing • Optimised, well-documented firmware with OTA update capability • Bench and real-world test results proving battery life, sensor accuracy, and stable data transfer • One fully working prototype and a hand-...

We are seeking an experienced Firmware Developer to support our ultra-slim wearable device built around the nRF52832 chipset and DRV2605L haptic driver. The ideal candidate has strong experience with Bluetooth Low Energy (BLE), low-power embedded systems, and haptic feedback control. You will be responsible for developing clean, reliable firmware that controls vibration patterns, BLE communication, battery management, and overall device behavior. We already have a mechanical design, a component list, and a draft schematic. If you also have experience with flex PCB design, this is a big plus — we are open to hiring one engineer who can handle both PCB and firmware, but firmware-only candidates are welcome too. Responsibilities: Develop BLE services (mode, amplitude, duration contr...

We are looking for an experienced flex PCB designer to create an ultra-compact 80 mm polyimide flex PCB for a wearable device. We already have: A complete mechanical specification (dimensions, component zones, cavities) A full electronics architecture (components, PCB zones, RF rules) A draft schematic + connectivity notes that must be reviewed and corrected Your task: Review & finalize the schematics Design the full 4-layer flex PCB (80 mm × 3.8–4.0 mm) Respect all mechanical and RF constraints (provided in documents) Deliver production files (Gerbers, drill, pick-and-place, stack-up) Requirements: Strong experience with flex PCB design Familiar with nRF52, BLE antennas, and tight wearable layouts Experience with haptic drivers (DRV2605L) is a plus Ability to work withi...

I am working on a project to develop an application using an ESP32 microcontroller. The main goal is to create an efficient, responsive and stable schedule to handle sensor data processing. Specifically, the programming will focus on the processing of capacitive data in self-capacitance and mutual capacitance. The first project will focus on programming 10 SELF CAPACITANCE sensors to operate independently. Ideal skills and experience required for this project include: - Proficiency in ARDUINO IDE. - Experience with capacitive sensor interface. - Proficiency in debugging and testing microcontroller applications. - Understanding of best practices in sensor data processing. I am looking for a collaboration to create an application optimized to process data from capacitive sensors to ensure hi...

I need an Alphacam specialist to take care of CNC programming tasks for my shop. Your job is to turn the drawings and models I provide into clean, collision-free NC code that is ready to run, complete with any setup information a machinist would expect. Typical work will involve importing the CAD file, defining tools and strategies, setting accurate feeds and speeds, running the built-in simulation to confirm everything, and exporting the final program. I’m open to whatever approach you feel produces the fastest, safest toolpaths—whether that means roughing, adaptive, rest machining, or anything else Alphacam offers. If you spot a way to shave seconds off cycle time along the way, even better. When you reply, please let me know: • Which versions of Alphacam you work in...

Ultra-Low-Power BLE Tracking Tag — Hardware & Firmware Development Project Description: I am developing a brand-new ultra-compact wearable tag that can be attached to keys, bags or personal items and report its position via Bluetooth Low Energy (BLE). The device must provide continuous BLE tracking, local on-device location detection, storage of the “last known location”, and a small acoustic buzzer to help the user find the tag when nearby. Extremely low power consumption is essential so that the battery lasts many months, and the entire device must remain very compact. Scope (hardware + firmware): Production-ready schematic (Altium, KiCad or equivalent) 2-layer (or better) PCB files, Gerbers and assembly drawings Antenna tuning/matching and complete, ordered BO...

I am refreshing a legacy product that once ran on a discontinued Cypress CY7C series. The only artifact that survived is the compiled HEX file, original schematics; the original codebase is long gone. Our new PCB is complete and waiting for firmware that reproduces—and, where sensible, improves—the original behaviour. Your task is to analyse or re-implement the HEX, then build a clean, well-documented project in PSoC Creator 4.4 that runs flawlessly on the new hardware. Core functions that must carry over are the existing communication protocols, sensor integrations, and power-management logic. I can supply the old HEX, the original schematic, and the new schematic as soon as we agree on scope . Deliverables • PSoC Creator 4.4 project with full source, organised for ongo...

I have an Arduino R4 that needs to email hourly some sensor data to my Gmail inbox and a SMS alert notifications if some data are our of range. Each message must contain timestamp of when the email is sent. The specific programm for automatic irrigation on ARDUINO Editor is already existing and access to the Arduino and g-mail account will be providet. The core tasks are: • Write and supply a well-commented sketch that connects the R4 to Wi-Fi, authenticates with Gmail (app password or OAuth2—whichever you find most reliable under Google’s current security rules), then pushes an email once every hour. • Write and supply a well-commented sketch that connects the R4 to Wi-Fi, authenticates to send SMS in certain occasions. • Format the email body so the timestam...

I am rolling out a small-scale industrial automation rig that runs on an Arduino Mega driving seven 12 V linear actuators through BTS7960 H-bridge modules. A 3.5-inch TFT touchscreen will serve as the local HMI, while an SD card stores a CSV database of stroke profiles to be recalled automatically whenever a hand-held barcode scanner sends a trigger. To keep the build reproducible, I need a turnkey package that includes: • Production-ready firmware (Arduino IDE / C++) covering barcode parsing, CSV handling, motion sequencing with soft-start/stop, fault detection, and a simple touch-driven menu. • A clearly labelled wiring diagram showing every connection between Mega, drivers, actuators, scanner, SD module, and display. • KiCad 8 PCB files for a custom shield that tidi...

I need an Android-based solution that can plug straight into a host machine and be recognised exactly like a standard coin validator or bill acceptor. The same device must expose both Bluetooth and USB, letting me switch between cable-free testing and a wired connection without changing firmware or wiring on the host side. Core behaviour • Emulate the full pulse train used by traditional validators – coin and note values must be configurable. • Speak ccTalk as a master, mirroring the command set and status responses a host expects. • Present itself as both a coin validator and a bill reader, so the host can poll either address and receive the correct replies. You deliver the APK for testing, full source code, and any bridge firmware if a microcontroller is re...

I’m finalising the electronics platform for a small CNC-style automation device (XYZ nema motor+ pan/tilt servo motor + 3 DC motors) and need an experienced embedded/firmware engineer to evaluate options, advise on tradeoffs, and map the estimated firmware effort for each choice. Important: I do not want a PLC or complex industrial control stack. The solution should be simple, reliable, and operate like a 3D-printer — easy to communicate with, easy to operate, and easy to update in the field. ________________________________________ Use case Automate up to 10 repeatable tasks for non-technical operators. Key product expectations include: • Start a stored motion path from an RF/wired remote • Optional scheduling and multi-selection auto-start • Manual/digital spe...

I need an engineer who can bridge my Windows-based application with an Arduino/PIC microcontroller over a reliable UART link. The project involves defining and implementing a compact binary protocol, parsing commands on both ends, and maintaining a clean mechanism for device-status reporting and error handling. On the firmware side you’ll extend or create code that runs on the microcontroller, parses incoming binary frames, executes the requested actions, and returns acknowledgements and status packets. On the PC side you’ll supply a lightweight library (C++, C# or similar is fine) that opens the COM port, formats commands, validates checksums, and exposes simple high-level calls the rest of my software can consume. Your work should come with clear documentation and a small...

I want to field-test a single, fully-functioning prototype that logs freshwater temperature and depth, stores up to 256 paired readings, and beams everything to a small handheld receiver once the float surfaces. Hardware parameters are already fixed. The float must fit roughly 195 × 25 mm, run from a CR123A cell, remain watertight, and carry both a waterproof temperature probe and a pressure sensor good for at least 35 ft. Wireless communication is via 433 MHz with an internal antenna; no external whip is acceptable. The receiver will also be battery-powered, pocket-sized, and feature a straightforward LCD that shows current temperature and depth as live data arrives. Firmware behaviour is equally clear-cut: sample every second or two, tag each temperature with the matching ...

1. Core Goal Build an STM32 program that uses joystick, LCD, RGB LED, and two potentiometers to draw shapes on the screen, controlled via a finite state machine. 2. Required Classes • Use Potentiometer and LED classes unchanged. • Create SamplingPotentiometer (inherits Potentiometer) using a Ticker to auto-sample at a given frequency. • No extra members beyond the given spec. 3. State Machine • Implement inside main() using an enum. • States handle everything: selecting start point, menus, shape choice, drawing shapes, showing options, etc. • Use RGB LED to indicate state (red initial, white menu, blue circle, yellow square, green rectangle). 4. Inputs & Interrupts • Joystick buttons must use InterruptIn with efficient ISR callbacks. • ISRs on...

I’m midway through an IoT build that combines a main Arduino board with several Wemos D1 Mini modules. The goal is to get reliable, secure two-way communication between the nodes, tidy up the wiring, and streamline the sketches so the whole system feels production-ready rather than proof-of-concept. Where I’m stuck is a mix of hardware troubleshooting and firmware refinement—simple things such as pin assignments that clash when multiple sensors share a bus, and bigger items like keeping the Wi-Fi connection stable after deep sleep cycles. I’d like to share my current schematic, the messy but functional .ino files, and a list of symptoms; from there, I need clear guidance and corrected code that I can flash and test immediately. Deliverables I’ll ask for are:...

I’m working on a college project that detects when a boarding-house door opens or closes with an HC-SR04 ultrasonic sensor driven by an Arduino-compatible ESP32. I need a complete, ready-to-run package: schematic, wiring diagram, and clean, well-commented code that compiles in the Arduino IDE (or PlatformIO if you prefer). The system must push data to the web so I can monitor it remotely and add more sensors later without rewriting everything. Web side I haven’t decided whether to host a custom site or ride on an existing platform, so I’d like your guidance. I’m comfortable with MQTT as the transport, but I’m open to your advice on whether to wrap that with ThingsBoard, Node-RED, or another lightweight stack. Whatever we choose, the web interface must show ...

I have a legacy board that runs on an NXP Semiconductors LPC922F microcontroller. The original firmware is no longer available in source form, so I need the code sitting inside that chip read out, converted into a clean hex file, and then translated into a human-readable format (annotated assembly or commented C-like pseudocode). The job involves: • Connecting to the LPC922F through whichever interface you consider safest—ICP, ISP or a suitable JTAG adapter—without damaging the part. • Bypassing or working around any read-out protection that may be active. • Dumping the full flash contents and verifying the dump against the device. • Producing an annotated disassembly that clearly marks key routines, interrupt vectors and configuration bits so a fir...