Mikrocontroller Jobs

I already have a fully routed EasyEDA project built around an ESP32 running MicroPython. The first prototypes work, but the rest of the circuitry is over-engineered. I now want a fresh set of eyes to review and streamline every component except the ESP32 itself. The targets are clear: trim the bill of materials for lower cost, cut idle and peak current for better power efficiency, and, wherever possible, boost overall performance while reducing wiring complexity. That means analyzing every resistor, capacitor, connector, regulator, sensor and support IC on the board, justifying each part’s value, and proposing smarter substitutes or eliminations. After the review, I’ll need an updated schematic, a clean BOM, and a revised PCB layout ready for manufacturing export (Gerber, Pic...

I want a piece of wearable technology that creates a protective bubble just around my body, blocking or seriously attenuating incoming RF signals while also giving me the option to see what is trying to get through. In other words, it should both shield my own bio-signature from external probing and help me detect any active transmissions aimed at my immediate vicinity. The environment is highly personal—think a one-meter radius wherever I move—so the solution needs to travel with me rather than sit on a desk or in a wall. Comfort, size, and battery life therefore matter almost as much as raw shielding performance. What I imagine is a compact, self-contained module (belt clip, pendant, or similar form factor) that combines three core functions: 1. Real-time RF spectrum ...

I need a seasoned embedded engineer to design and implement a lean Time-Division Multiplexing protocol that funnels several high-speed ADC channels into a single, reliable UART stream. The end goal is clear: squeeze the maximum possible throughput out of the link without sacrificing data integrity. The work revolves around three core competencies—TDM protocol development, raw ADC data handling, and low-level UART communication—so fluency in each of these areas is essential. Our front-end hardware already produces digitised samples via a bespoke analog-to-digital conversion stage; your task is to move those samples efficiently over UART, interleaving them with tight framing, minimal overhead, and built-in error checking. Key deliverables • Well-documented C/C++ (or equi...

I’m building a custom handheld that plays original Game Boy Advance and Game Boy Color cartridges and I need the entire internal hardware engineered for it. I will be designing and manufacturing the outer shell myself, so your focus will be everything that sits inside the case: • A reliable GBA/GBC cartridge reader is the top priority; it must boot retail carts flawlessly. • Back-lit LCD (or IPS) screen driven at the correct refresh rate with minimal tearing. • Stereo speakers plus a small on-board amplifier and 3.5 mm headphone jack. • Rechargeable battery pack with USB-C charging and power-management circuitry (fuel gauge, protection, and safe-charge IC). • Responsive D-pad, A/B + L/R buttons, Start/Select, and volume control interface routed to a ...

PCB Design Brief Timeline Media Dock Controller Board This project requires a KiCad PCB design for the first prototype of a open source Media Dock. The dock is a hardware reader device used to interact with physical Media Volumes, which are media cartridges containing either storage media (SD card) or NFC identification tags. The board will be installed inside a dock enclosure and connected to a front display. Core Features The PCB must include support for the following components: Microcontroller ESP32 module (recommended) or equivalent microcontroller suitable for handling: SD card access NFC communication display control system logic NFC Reader The board must include an NFC reader chip (such as PN532 or equivalent) used to detect and read NFC tags embedded in Timeline medi...

I’m building an IoT device around an STM32 microcontroller and need the complete hardware-plus-software package brought to life. The board must expose SPI, UART and I2C so I can hook in sensors and a radio module later, and all routing should follow good signal-integrity and low-power practices typical for connected products. You’ll start with the schematic, translate that into a compact multilayer PCB layout, then generate Gerbers ready for production. On the firmware side, clean, well-documented C code that compiles in STM32CubeIDE (or a comparable GCC toolchain) is essential; feel free to leverage HAL, LL drivers or FreeRTOS if it simplifies maintenance. Make sure every peripheral pinout matches the final PCB and provide a simple test routine that proves SPI, UART and I2C t...

This project is about building a physical “AI Secretary” system that combines a premium desk device with ultra‑simple wireless buttons people can stick anywhere to reach the same assistant. The goal is not just a gadget, but a coherent hardware family that makes interacting with my AI models feel tangible, fast, and effortless. At the center is the Desk Hub, a compact, high‑end box that lives on a desk like a small instrument. It has a small front display, a few physical buttons, a subtle light ring or LED bar, a microphone, and a speaker. Internally it runs on an ESP32‑class microcontroller with Wi‑Fi and Bluetooth. The Hub is always powered via USB‑C and always connected to my cloud backend, where all speech‑to‑text, language model processing, tools, and text‑to‑speech live. ...

I need an experienced FPGA programmer to assist with a data processing application. Key Requirements: - Proficiency in at least one of the following FPGAs: Xilinx, Altera, Lattice - Expertise in data processing applications - Familiarity with VHDL, Verilog, or SystemVerilog Ideal Skills and Experience: - Proven track record in FPGA programming - Strong background in data processing algorithms - Ability to work with various FPGAs and HDLs Please provide relevant experience in your bids. We need to develop ethernet hub in fiber optic 2 ports , and 16 SPI for chip led controller using data and clock . SPecia Ethernet protocol defined by us.

I want PCB design to order from JLCPCB. PCB combines an Ai-Thinker VC-02 Offline Voice Recognition Bare module with a CH32V003F4P6 MCU. The board will accept 5 V DC, step it down to 3.3 V through an AMS1117-3.3, and exchange UART data between the VC-02 and the CH32V003. Eight digital inputs—each pulled low to GND on trigger— to CH32V003. CH32V003 must switch eight relay (on the same PCB, sugar cube 5v relay) outputs that are driven in one neat block through a ULN2803ADWR. To make the VC-02 fully usable I need its programming port (TX, RX, VCC, GND), a speaker connector and a microphone connector on the PCB. A second programming header exposes PD1, VCC and GND for the CH32V003. All connectors together total six ports: 9-pin input (8 input and GND for return line to 8 input), bo...

1: Simple Arduino device detecting a switch from a device 2: 2 RBG light strips with 16 LEDS 3: 4 input outputs for on and off

I am looking for an engineer or a small engineering team to help build a working prototype of a wearable smart ring that communicates with a thin wallet card device placed in a wallet. The purpose of the device is to prevent wallet loss by alerting the user when the wallet moves more than a short distance away from the ring. The system should provide two types of alerts: a vibration alert in the ring and an optional audio alert. The project goal is to create a fully working prototype that demonstrates the concept in real life. Experience with miniature electronics, wearable devices, Bluetooth communication, and prototype development is preferred.

I’m building a small arcade-style attraction made up of six identical stations. Each station will recognise when its hand-held controller is lifted by means of a magnetic sensor—or any other proper kind of sensor —then launch a three-minute countdown. Here is the user flow I need you to realise: 1. Controller is lifted → internal timer starts. 2. An OLED screen at that station immediately shows the remaining time, counting down in real time. 3. When the three minutes expire the screen simply replaces the countdown with a clear “Game Over, move to next zone ” message + a buzzer or light; 4. Once the controller is set back the system must reset itself, ready for the next player. Hardware thoughts so far: magnetic (reed or Hall) sensor to detect li...

I have a commercial IR-band Laser device with essentially two "Modes" - NORMAL and TRAINING, or restricted. Switching between the two can only be accomplished by accessing the Firmware via a proprietary 8-pin connection, for which I do not have a cable or interface. The candidate must either A) build a custom breakout to connect to the proprietary connector, or B) modify the OEM CONTROLLER pad and cable. Once the system is accessed, no custom coding, overwriting, or modification of the firmware will be required; the Candidiate need only identify the language, access the settings, and "flip the switch" between the two settings profiles. The hard part will be creating the connection. Something as simple as a POGO pin may be sufficient, but I am not qualified to say. T...

Hi everyone, I’m currently looking for a talented freelancer who has strong experience with Flowcode 10 and can create an amazing and efficient program for a project I’m working on. -Must be comfortable building programs in Flowcode 10 -Able to design clean, well-structured logic and functionality -Experience with microcontroller projects is a plus If you’re skilled with Flowcode and interested in collaborating, please comment below or send me a direct message with: • A short introduction • Your experience with Flowcode • Examples of previous work (if available) Looking forward to working with someone passionate about building great programs!

We need a board that "translate" signal from DMX to led strip pixel adressable. Need to integrate RGB and RGBW pixel in various protocol, with clock or only data. Only one data signal needed (170 rgb pixel or 128 rgbw pixel to complete universe) -Possibilities to set start adress -Possibilities to control multiple pixel as one pixel (grouping for have total of 2x or 3x o 4x pixel controlled) -Setting IC ,Address and Grouping by dipswitch or other way accepted (also usb serial with proprietary software) -ALL SETTINGS NEED ALSO TO BE SETTED BY RDM -Usb or serial connector for upload firmware We are open to every system from arduino to anything. Need to be thinked in hardware and software side. Other this one we need a variant with pwm rgbw output with same feature like RDM, ...

I need the internal circuitry of the KK-82MS scientific calculator documented so I can design a drop-in replacement PCB. Your job is to open the unit, trace every relevant signal, and give me a clear map of what connects where. The focus is on both LCD behaviour and the button-scanning scheme, so I expect you to show how each LCD segment is driven, which pins act as commons, how the microcontroller multiplexes them, and the exact keyboard matrix rows and columns the processor polls. Feel free to combine a logic analyser, multimeter, oscilloscope, or any other bench tool you trust; choice of instrumentation is up to you as long as the final data are unambiguous. Deliverables • High-resolution photos of the calculator fully disassembled, including close-ups of the flex cables and IC m...

I have a stable FreeRTOS-based firmware that currently compiles only under my portable Arduino IDE 1.8.13 setup for the SAMD51 MCU. I now want the project to build and run cleanly in the latest Arduino IDE without carrying along any of those version-specific hacks, board package pin-tweaks, or legacy library work-arounds. Once the codebase is modernised, the next step is to extend it with new sensors. You will receive the present firmware, board-support files, and the partial sensor drivers at project start.

Hello, **We only consider the QC from China only** I have a consignment of electric Product - Mosquito Diffuser that will be ready to leave the factory in Chengdu, Sichuan, and I need an experienced quality inspector on-site before it ships out. The task is strictly a pre-shipment check focused on two areas: visual inspection of workmanship and packaging, and functionality testing of the finished units. You will visit the factory on the agreed date, work alongside the production team without disrupting their flow, and provide an independent report that lets me decide whether to release the balance payment to the supplier. Scope of work • Visual inspection – confirm cosmetic finish, labeling, accessories, and carton integrity meet the approved golden sample. • Functio...

Looking for an Engineer with strong experience in industrial automation, control systems, and OT infrastructure. Freelancers should be proficient in following: ----->>> Configuration, maintenance and troubleshooting of HMI (C300, C300PM, UOC, HBM) ----->>> Support and troubleshooting of PLC systems and SCADA integration ----->>> Expertise in Control loop tuning and basic advanced control (PID) I am looking for experts from Pakistan only.

Hi, I'm looking for an experienced PCB designer to create a custom carrier/breakout PCB for a compact handheld device. No firmware or software needed — design only. Core Module: LILYGO TTGO T-Call V1.3 (ESP32 + SIM800L GSM) — mounted on the PCB via pin headers Components to integrate on PCB: OLED Display (SSD1306 128x64, I2C, 4-pin): Mounted above the PCB using standoff spacers — 4 mounting holes required Height will be adjusted with standoffs 4-wire cable from display soldered directly to PCB pads Buttons: 1x membrane switch connector (2-pin) for main button 2x additional button footprints connected to spare GPIO pins (for future use) Buzzer: Passive buzzer mounted directly on PCB Connected to designated GPIO via NPN transistor + flyback diode driver circuit ...

I need a complete hardware-and-firmware solution that blends a PIC microcontroller with Arduino-compatible modules on a custom-made PCB. The end goal is to streamline several industrial processes, and I also want the design flexible enough to drive lighting, heating & cooling, and security subsystems that resemble home-appliance automation. Here is what I envisage: • Schematic and PCB layout ready for fabrication, including a clean separation between the PIC control core and any auxiliary Arduino shields or sensor breakouts. • Embedded C / Arduino-style firmware that handles real-time control loops, sensor inputs, and actuator outputs for an industrial environment. • A concise BOM with component part numbers that are actually in stock. • Production-ready Ger...

I’m building a microcontroller-based system around an stm32 and need compact, reliable embedded-C firmware that lets me read multiple sensors and move their data cleanly through standard communication channels. The core of the job is classic microcontroller programming: bring up the chip, initialise the peripherals that the sensors require (typical I²C, SPI or simple GPIO timing), perform periodic reads, apply any basic filtering the devices recommend, then expose the results over the communication protocols we agree on—UART is mandatory; CAN or USB-CDC would be a welcome extra if time allows. You will be working with the latest STM32CubeIDE tool-chain, so please be comfortable with HAL and, where efficiency demands, direct-register work. I’ll supply full pin-outs, ...

We are a climate-tech company based in Coimbatore, India, seeking an experienced Electrical Control Panel Engineer or UL/CSA-certified Fabricator to design and build a compliant industrial control panel for export to Canada. The panel must meet UL 508A (USA) and CSA C22.2 No. 286 (Canada) standards. The system will power and control our environmental air-purification unit integrated with IoT/PLC components. Scope of Work: Design, fabricate, and document a complete industrial control panel using UL/CSA-certified components. Include a Main Power Cord (SOOW or SJTO type) and a UL-listed Circuit Breaker (Type C or D curve) for primary overcurrent protection. Integrate a DIN-rail mounted SMPS (24VDC output) to power either a PLC (Allen-Bradley/Siemens) or a custom PCB-based controller. Pr...

I’m looking for an experienced developer who can build fully emulated firmware for a DMA card. The firmware should be compatible with Windows and capable of emulating several key functionalities, including: 100% CFG The configuration space of the firmware should perfectly replicate that of a legitimate device, allowing it to be detected and recognized by the system as authentic hardware. BAR Support BAR (Base Address Register) represents the memory region inside a PCIe device. The BIOS reads this information in order to properly communicate and interact with the device. Emulation Correct BAR handling ensures that when a driver sends a request to the PCIe device’s BAR, the firmware responds with the appropriate data, effectively imitating the behavior of a real device. Full ...

The original schematics and firmware sources for my existing motherboard are no longer available, yet I still need to keep the product alive and solve a series of recurring hardware failures. The immediate objective is to reverse-engineer the board in detail so I have a complete, accurate picture of how every power rail, I/O interface, and embedded controller is wired and programmed. Once that knowledge is captured, I want a refreshed design that removes today’s failure points and is ready for a short production run. Work starts with non-destructive teardown, high-resolution imaging, net tracing, and firmware dumping via JTAG/SWD or any other proven technique. From there the task moves into schematic recreation (Altium Designer or KiCad preferred), BOM generation with current compon...

Project Overview This project aims to develop a small WiFi gateway that connects to a Danfoss EKC 202C refrigeration controller via Modbus RTU (RS-485) and provides a local web interface. The system should allow monitoring of key controller values and limited control via a browser. The first version is a local-only solution without cloud connectivity, but the architecture must allow future expansion to cloud services. Hardware Assumptions • ESP32 or similar WiFi-enabled microcontroller • RS485 interface module for Modbus RTU communication • Connection to Danfoss EKC 202C controller (via Modbus adapter) Setup Flow • On first boot the device starts its own WiFi Access Point • User connects via smartphone or laptop • User opens configuration page at • Use...

I’m putting together an all-terrain rover that pairs a Raspberry Pi 5 with an Arduino. The Arduino will sit close to the hardware, polling and driving everything from temperature-humidity probes and distance sensors to an IMU (pitch/yaw/roll, altitude, compass), ESC-PWM motor controllers, speed-over-ground tracking and battery-management read-outs. All of that raw data needs to flow up to the Pi, where it is bundled, logged and pushed over a 4 G link. The Pi also runs the user interface on an onboard touchscreen. I want that interface to launch straight into a clean dashboard with drag-and-drop style widgets so I can rearrange or resize gauges, graphs and buttons while in the field. On the software side I need: • Firmware for the Arduino that publishes every sensor value pl...

I want to build a persistence-of-vision LED system that mounts on a standard bicycle wheel and shows crisp, full-color static images whenever the wheel reaches riding speed. The image should appear only at higher RPMs—cruising or sprint speeds—not while I am moving slowly or stopped. Core functionality • An addressable 256 LED spoke mounted strip driven by a small micro-controller (ESP32, Arduino-compatible, or similar) and powered by a lightweight, wheel-mounted battery. • Firmware that stores and renders static bitmaps in correct perspective as the wheel spins, synchronizing via hall-effect or magnet sensor. • A simple phone app that lets the rider pick any image, crop it to a wheel-friendly template, and wirelessly push it to the controller. There is no...

I’m building an automated live-play poker table and need the complete RFID hardware blueprint that will let software read every chip on the felt in real time. The table will hold well over 100 tagged chips at once, and I want reliable High-Frequency (13.56 MHz) reads at a maximum distance of about 10 cm from the antennas under the layout. Your task is purely on the hardware side: define an architecture that can see each chip as stacks move, bets slide, and pots grow, then pass clean data to the software team through a simple API or wired interface of your choice. Key expectations • Robust HF antenna array layout sized for a poker table, including multiplexing strategy to handle >100 simultaneous tags without collisions or dead zones. • Reader, controller, and MCU/FPG...

I need a compact 2-4 channel analog MEMS microphone array built around an XMOS processor. The board must perform real-time beamforming, echo-cancellation and noise-suppression, then expose a clean audio output through straightforward header pins so it can be patched into downstream hardware without fuss. Size matters here: the smaller the PCB, the better. I’m expecting you to handle the full hardware cycle—schematic capture, PCB layout, component selection and a ready-to-order BOM—plus the XMOS firmware that brings the DSP features to life. Your code should compile and run on the free tools from XMOS; please include any scripts or tuning utilities you rely on. Deliverables • Production-ready Gerbers, pick-and-place file, annotated schematic • BOM with supp...

I’m building a small-footprint PCB around the ESP32 that will serve as the core of several IoT devices. The board must expose reliable Wi-Fi, Bluetooth, and flexible sensor headers so it can drop straight into prototypes and low-volume production runs. Here is the scope I have in mind: • Schematic capture for the ESP32 module with stable power-management, antenna clearance, and USB-to-UART programming interface. • PCB layout (2-layer is fine if performance allows) that remains within 50 × 50 mm, ready for standard SMT assembly. • Breakouts or onboard footprints for common environmental sensors; I haven’t finalised the exact parts, so leave room on I²C and a couple of ADC/GPIO lines for temperature, humidity or motion modules. • Production...

My drone refuses to finish its latest firmware update and is now stuck in an endless restart loop. I need an experienced developer who has already dealt with drone firmware quirks to track down the root cause, flash the correct binaries if necessary, and get the aircraft flying again. The work is strictly troubleshooting: no new features or redesigns—just a clean, stable fix. While the main symptom is a failed firmware load, I’m open to your testing any related areas such as connection hand-shake or crash logs if you suspect they’re part of the problem. Deliverables • Diagnose the exact point where the firmware update fails • Apply or guide me through the corrective procedure (new build, bootloader tweak, or safe-mode flash) • Verify that the dr...

I have a multi-rotor nanodrone running ArduPilot that must fly semi-autonomously via GPS waypoints. The core of the job is to configure the ArduPilot stack so the craft can: • Accept a pre-loaded waypoint flight plan • Accept inject, delete, or reorder waypoints in real time through a long-range data link • Provide the FC ready to integrate: on-board camera, LiDAR, other UARTS devices • Execute a dependable Return-to-Home routine triggered by failsafe, low battery, or a command from the ground station I already have the flight controller, ESC, batteries, motors, associated wiring, and drone frame What I need is the firmware configuration, leveraging COTS Ardupilot and MAV-link. At power up, the drone shall arm and launche with minimal manual intervention, besides the...

I am looking for a developer to create an Arduino-compatible library for the ESP32 to operate the ultrasonic sensor Pepperl+Fuchs UC4000-L2M-B16-V15-M. Requirements Communication via CANopen The library must run on ESP32 using the Arduino framework The sensor should be fully configurable and readable through CANopen Implementation of synchronous communication The synchronization (SYNC) must be configurable so that it can operate in counterphase (opposite phase / alternating timing) Functionality Initialization of the CAN interface on ESP32 CANopen communication with the sensor Reading measured distance values Configuration of relevant CANopen objects if required Ability to set and handle SYNC timing and counterphase synchronization Clean and reusable Arduino-style library stru...

PCB DESIGN with these or better components placement Processor & Memory Main SoC NXP iMX8M Plus — Quad Cortex-A53 1.8GHz + Cortex-M7 800MHz Safety MCU TI TMS570LS3137 — dual-core lockstep Cortex-R4F, SIL-2 certified Diag FPGA Lattice MachXO3LF-9400 — in-situ verification logic, <2ms latency RAM 4 GB LPDDR4, ECC enabled, 1600 MT/s Flash 32GB eMMC 5.1 (AES-256-XTS) + 128MB QSPI NOR boot Wireless MCU ESP32-S3 co-processor (Wi-Fi 6) Sensor Specifications Temperature PT1000 ±0.05°C (primary), DS18B20 ±0.5°C (backup), NTC (tertiary). Range: −40 to +150°C Humidity SHT45 ±1.0%RH + HDC3020 ±1.5%RH. Range: 0–100%RH, 0–85°C Pressure MS5837-02BA 0–2bar ±0.05%FS + MS5837-30BA 0–30bar (secondary) L...

I need a full architecture and layout for an advanced, multi-sensor PCB that will regulate heating, cooling and humidity inside a pharmaceutical machine. The board must interface with temperature, humidity and proximity sensors as standard, while leaving room for additional inputs such as light, pressure, water-level and high/low-voltage detectors. All sensing channels have to support automatic failure detection so the system can trigger the right alarm—heater, compressor, open door, over/under temperature, over/under voltage, pressure deviation—without user intervention. On the connectivity side I want both wired and wireless options: LAN, USB, CAN-Bus and RS-485 for plant integration, plus a wireless link for cloud dashboards. A capable processor with dedicated RAM and non-v...

Project Title: Miniature Piezo Preamp PCB (10mm) – Reverse Engineer & Redesign Project Overview I am developing a professional leak detection microphone used for plumbing diagnostics. The system uses a piezoelectric sensor to detect vibration and sound from water leaks inside pipes. I already have a working preamp circuit, but the PCB is too large for my application. I need an experienced electronics engineer to analyze the existing design and redesign it into a much smaller PCB. The new design must maintain similar electrical performance but reduce the physical size so it can be mounted directly on the piezo sensor and permanently sealed with epoxy resin inside a capsule. Primary Objectives 1. Analyze or replicate the functionality of my existing piezo preamp. 2. Redesign ...

I need a fully-functioning prototype of a portable lunchbox that can actively heat food up to 60 °C and cool it down to 4 °C at the press of a touchscreen control. The enclosure should be molded primarily from food-grade plastic; please keep the overall profile compact enough to fit in a standard backpack while leaving room for the insulation, Peltier or heating elements, battery pack, control board, and a small food compartment sensor. Key functions I expect to see working on the bench: • Touchscreen interface on the lid that lets the user toggle between Heat (60 °C) and Chill (4 °C) modes, with real-time temperature read-out. • USB-C charging input feeding an internal rechargeable battery that can run at least one full heat cycle and one full cool cycle on ...

I am working on a concept of mainly "Preventive Maintenance using Sensors" For this I will Import sensors from China; Install at factories and Charge monitoring subscription in Maharashtra. I want guidance on below -- Which sensors to buy from these ones (dont want hypothetical answers like alibaba and some listed companies over it - that ChatGPT also gives: vibration sensors; temperature sensors; motor monitoring devices. Need exact compaby and specification and to which cloud platform as well as dashboard it would be fit for AI monitoring remotely. No ChatGPT answer please - I want someone who have actually worked on it or knows end-to-end. Next: Sensors + Edge device + AI software - which one to use and how? Wireless Vibration Sensors; Motor Condition Monitoring Advanced Se...

I’m ready to move an industrial-grade controller from concept to production and need a designer who has already shipped tight, 6-layer boards. The board must host a main microcontroller, its support circuitry, and several high-current power-regulator stages, all within a restricted outline while meeting EMI/EMC limits typical for factory environments. You’ll start from my block diagram and rough schematic notes, turn them into a production-ready layout, and supply every file the assembly house will ask for: updated schematics, stack-up, Gerbers, drill files, pick-and-place, BOM, and a brief design report explaining how the EMC strategy and size targets were achieved. I’ll be available for rapid feedback on component placement and routing choices, and we’ll sign ...

I’m working on a project with the AVR-IoT Cellular Mini (Sequans Monarch 2 modem), where I modified the Arduino-based firmware myself to periodically transmit GPS latitude and longitude data to my backend (BE) over HTTPS. The objective is to send GPS data (latitude, longitude, and timestamp) to a REST API endpoint at a defined interval and confirm that the data is successfully received and visible on the backend. At the moment, I’m blocked by a TLS issue while attempting to configure the CA certificate for HTTPS. When I try to add the root CA certificate (ISRG Root X1 – Let’s Encrypt) to the device/modem, I get an error that says: “CA certificate input too long” Because of this issue: • The TLS handshake fails. • The HTTPS request does no...

Project Description (PCB Design) I am looking for a PCB designer to design a low-power IoT board for production line. Main requirements: Microcontroller: ESP32 with Wi-Fi or other Sensors: VL53L4CD Time-of-Flight laser distance sensor 10K NTC thermistor temperature sensor probe The sensors should be connected by wire to the PCB Low power consumption (battery-powered, using NiMH battery) Removable battery (NiMH ) Connector for external sensors (JST-PH 2-pin or similar) The laser sensor may be placed remotely with a cable from the PCB The PCB should low-cost manufacturing and low power consumption. Deliverables: Schematic design PCB layout BOM (bill of materials) Gerber files for manufacturing Basic firmware guidance if needed

I need an experienced PCB programmer to reprogram a multi-layer PCB for a coffee maker. The board is used for a coffee maker. Required Skills and Experience: - Proficiency in reprogramming multi-layer PCBs - Experience with radio frequency (RF) applications - Knowledge in embedded systems - Familiarity with brewing settings, temperature control, timing and scheduling, and pump control functionalities

Dont send me AI content . I am using AI detection to check your proposals I need an engineer who knows both Pro-face Blue projects and Beckhoff TwinCAT HMI Server inside out. The task is to take my existing Pro-face HMI application, study how every screen, alarm and data point works, then rebuild the same functionality in the Beckhoff HMI environment so it talks smoothly to a new Beckhoff PLC. You will start by reviewing the current project files I provide, mapping all tags, recipes and alarms. From there, recreate the screens, navigation and any underlying logic in TwinCAT HMI. Along the way I expect you to flag any behaviour that will need re-thinking in Beckhoff, suggest work-arounds, and implement them. Because the line cannot afford long downtime, I want the converted HMI fully test...

PROJECT SUMMARY: I need an experienced RF/NFC hardware engineer to design a compact, modular 4×4 NFC sensor array board. The board will be used to detect and identify NFC-tagged objects placed on a flat surface (e.g., industrial tray, logistics sorting grid, or interactive tabletop application). Multiple boards (up to 6) will be tiled together to cover larger surfaces. Each board must detect and report the UID of ISO 14443 and ISO 15693 NFC tags placed on any of its 16 positions, within 500ms scan time for the full array. This is not a greenfield project. I have an existing but non-functional 6-layer PCB design (EasyEDA source files available) that attempted this with an ST25R3916B, STM32L476, analog multiplexers, P-MOSFETs, and PIN diodes simultaneously. The design is overenginee...

I aim to develop a solution that will facilitate data communication between an Arduino UNO and a SIM7600E using AT+COMMAND. The primary data in focus will be temperature sensor readings. Key Responsibilities: - Setting up a reliable connection between Arduino UNO and SIM7600E - Implement AT+COMMAND for effective communication - Design a protocol for transmitting temperature sensor data Ideal Skills: - Solid knowledge of Arduino - Proficiency in handling SIM7600E - Experience in implementing AT+COMMAND - Understanding of sensor data transmissions. Please ensure you can efficiently deliver on these requirements, and provide the mentioned sensor data communication before placing your bid.