微控制器 Jobs

I have an ESP32 dev board on my bench and need it turned into a compact sensor hub. The entire focus is sensor integration—specifically motion & proximity plus light & sound. Some of the devices will be hard-wired to GPIO pins while others should connect wirelessly, so the firmware must handle both connection paths seamlessly. Here’s exactly what I need delivered: • Well-commented source code (Arduino-ESP32 or ESP-IDF) that polls each sensor, filters noise, and publishes readings over Serial and MQTT. • A clear wiring / pin-out diagram for the hard-wired sensors. • Configuration notes that let me pair or re-pair any wireless sensor modules. • A short README covering library installs, flash commands, and expected output. Acceptance criteri...

PCB Design Requirement Project: BLE to Wi-Fi/Ethernet Gateway Device. The objective of this project is to design a BLE to Cloud Gateway device that integrates: - Nordic nRF52840 (BLE receiver) - HLK7628N Wi-Fi / Ethernet Linux module The device continuously receives BLE packets, forwards them to the HLK7628N through USB, and uploads the data to the cloud over Wi-Fi or Ethernet. When internet connectivity is lost, incoming data will be stored locally on an SD card using a rotational buffer mechanism, and synchronized automatically once connectivity is restored. The design must follow best practices for RF layout, impedance control, EMI mitigation, and grounding, enabling FCC and CE certification. The HLK7628N module and nRF52840 chip are fixed components and must remain in the desig...

I’m putting together a very small-scale project on an Arduino Uno and simply need a clean, well-commented sketch that switches an LED on and off. No elaborate libraries or peripherals—just straightforward LED control that compiles in the current Arduino IDE and can be uploaded over the standard USB cable. What I expect from you • An .ino file that drives either the onboard LED (pin 13) or an external LED on any digital pin I can redefine at the top of the sketch. • Clear inline comments explaining each step so a beginner can follow the logic and reuse the code in future experiments. • A short read-me noting the exact IDE version you compiled with and the wiring diagram if you choose an external LED. That’s all—simple, reliable, and ready to ru...

I’m developing a compact data-acquisition module and need a local electronics engineer in Austin who can take the mixed-signal front-end from concept to ready-to-fab documentation. The heart of the job is a clean, low-noise analog section feeding a high-resolution ADC, with the digital side handling basic buffering and a simple SPI or I²C hand-off to my existing microcontroller board. We’ll meet in person for the initial requirements review and again when hardware is on the bench so rapid tweaks are possible. I already have rough performance targets—sampling at 1Hz, 12–16-bit resolution, and a 12V single-rail supply—but I’m looking for your guidance on component selection, input protection, and clocking strategy to hit those numbers without over-en...

I want a simple two-channel radio link that can do just two things reliably: 1) vary the speed of my brushless DC motor through its ESC (accepts S-Bus or standard PWM) and 2) toggle a single relay on or off. Hardware • I already have the motor, ESC, and relays. • You may choose Arduino, Raspberry Pi, or any Adafruit board—use whichever keeps the build small, inexpensive, and stable. Radio requirements • The handheld transmitter must let me select the operating band with a physical switch: 2.4 GHz, 900 MHz, or 433 MHz. • If LoRa is the cleanest way to hit those bands, great—just make sure the LoRa hop gives me at least a 1 000 ft (≈300 m) clear-line range. Long-range reliability is more important than data rate or extreme power savings...

We are looking for an experienced Embedded Firmware Developer to program firmware for a sauna control hardware device. The PCB and hardware are already designed and working, and we now need a skilled developer to implement and optimize the firmware. This device will control sauna temperature, timers, safety features, and communicate with a mobile application (iOS & Android). Project Overview We have built a custom sauna control hardware board that will allow users to control and monitor their sauna .The firmware should handle the device logic and also enable communication between the hardware and the mobile application. The mobile app will allow users to: Turn sauna ON / OFF Adjust temperature settings Set timers Monitor current temperature Receive status updates from the dev...

Project Brief: Stealth-Modified Automatic Parking Disc (Certified for Public Road Use in Germany) Project Goal: I want to technically modify a certified electronic parking disc approved for use in Germany (must have an official certification number and ECE approval), so that it continues to automatically update the displayed parking time even after the vehicle has been parked. This modification must be invisible and undetectable from the outside, meaning the device must look and behave like the original product to any observer or parking enforcement officer. Background: Standard electronic parking discs are designed to detect when a vehicle is turned off and then freeze the display at the next permissible half-hour mark. This allows parking enforcement to determine how long the car has b...

I'm looking for an experienced developer to build a weather monitoring system using a Raspberry Pi Pico. The system should interface with an RM Young 05108 Anemometer to measure wind speed and direction, as well as a temperature and pressure sensor. Requirements: - Use I2C for data transmission - Utilize an OLED display to visualize: - Wind speed and direction - Temperature and pressure - All data on one screen Ideal Skills & Experience: - Proficiency with Raspberry Pi and I2C communication - Experience with OLED displays - Knowledge of weather sensors and data integration - Strong programming skills, preferably in Python Please provide samples of previous similar work.

We are seeking a highly competent Freelance Automation Engineer to support the design, development, programming, and commissioning of PLC & SCADA systems for wastewater treatment role requires a results-driven professional who can independently manage automation scope—from control philosophy development to site commissioning—while ensuring full compliance with industry ResponsibilitiesDesign and develop PLC & SCADA architecture for wastewater treatment control philosophy, IO lists, cause & effect matrices, and system PLC programming, HMI/SCADA configuration, and system FAT, SAT, troubleshooting, and commissioning and ensure compliance with IEC, ISA, and industrial automation with electrical, instrumentation, and process engineering control logic for efficien...

I want to put an end to guessing when my plants need water by building a small, battery-friendly device that measures soil moisture, pushes the reading to the cloud, and emails me whenever the level drops below a threshold I can set in a companion mobile app. Core features • Soil moisture detection with reliable, calibrated readings • Wi-Fi or BLE link from the probe to the cloud • Email alert generation (no SMS or push needed) • Mobile-only dashboard that shows current moisture %, historical trend, last alert time, and a slider to adjust the alert threshold I’m open to an ESP32, ESP8266, or similarly low-power MCU and prefer code in Arduino/C++ or MicroPython if that speeds things up. Low standby current, deep-sleep cycles, and a compact PCB (or even a ...

Please be careful, you must create the 3 real PCBs; we are not interested in virtual projects. After the 3 PCBs have been successfully tested here in our office, we will release the money following the rules of freelacer.com. I will agree on the cost of the work and the time of execution with the developer. I've already built some prototypes of a circuit capable of switching a single 230 V, 16–30 A line to 4, 8, or 12 outputs—without power loss—but none of them have reached the standards I expect. I have schematics, calculations, thermal measurements, and test logs: enough material to clarify every technical detail and speed up your work. I need a senior designer who can transform all this into a final solution, complete with ESP32 firmware, a multilayer PCB (4 or...

I need a working prototype of a compact pool-cleaning robot designed, built, and shipped to Pune by 20 March. Its two core tasks are debris collection across the pool floor and reliable wall-climbing so it can scrub and vacuum vertical surfaces as well. The unit must run on a rechargeable battery pack—no cords in the water—and be steered with a simple handheld RF remote (forward, reverse, left, right, start/stop). A smartphone app or timer isn’t necessary; keeping the hardware lean is key because the entire build, plus packing and freight, must stay within an 18 k INR ceiling. I’m open to clever use of 3-D printed housings, sealed brushed or BLDC thrusters, and readily available filters to hit that cost target while ensuring waterproof integrity. Good buoyancy cont...

ALFA NETWORKS ADAPTOR OR SIMILAR IS A REQUIREMENT I need a cyber sec expert who already owns an Alfa Networks USB adapter (or a comparable injection-capable card) to carry out a controlled WiFi-based denial-of-service exercise. The goal is to you use the Kali Live boot with persistence USB stick, and the Alfa Networks adaptor, to launch a Denial-of-Service attack on your own mobile phone (or smart TV etc) in order to prevent it accessing your home WiFi. its just a simulation so we only need 4 screenshots. I ordered my alfa networks adaptor but it got delayed with the shipment so now need help if you own one. ALFA NETWORKS ADAPTOR OR SIMILAR IS A REQUIREMENT

I want help building a simple zigbee device to use as a smart thermostat. its using a esp c6 super mini, screen, 2 buttons and a presence sensor. I have tested all the wiring and all works and got it showing on the ESP. The part i want, is to turn it into a Device, that when you connect it to Home assistant through Zigbee. it shows on the UI of Home assistant boxes you can fill in. One for Room Temp sensor (external sensor so you enter a device ID to read the state) One for Boiler ID (to read if the Boiler is currenttly on or off and show a icon on screen to show its state) and one to enter the Smart TRV device id, so what temp i set on the Thermostat it then updates it to the TRV. And to give the Presence Sensor a Device ID, so i can use it to set Automations in Home assistant manual...

I’m building out the engineering team for our AI-driven startup and I need a dedicated embedded developer who can take full ownership of the automotive side of our product line. Your day-to-day work will revolve around three core responsibilities: writing robust firmware that brings our AI features to life, integrating that code seamlessly with sensors and control units already in the vehicle stack, and collaborating on hardware design decisions so everything works together flawlessly. We are moving fast, so I’m looking for someone who is comfortable working full-time alongside our in-house data science and mechanical teams, iterating quickly from prototype through to production-ready boards. Expect a hands-on role that blends coding, debugging on target hardware, and validati...

I need an experienced programmer to develop a PLC and HMI system for quality control processes using a Fuji SPF PLC and Fuji Monitouch HMI. Key requirements: - Program Fuji SPF PLC - Develop HMI screens on Fuji Monitouch - Implement quality control logic and processes - Ensure system is reliable and user-friendly Ideal skills and experience: - Expertise in Fuji PLC and HMI - Background in quality control automation - Strong programming skills - Attention to detail and problem-solving ability Looking forward to your bids!

ALFA NETWORKS ADAPTOR OR SIMILAR IS A REQUIREMENT I need a cyber sec expert who already owns an Alfa Networks USB adapter (or a comparable injection-capable card) to carry out a controlled WiFi-based denial-of-service exercise. The goal is to you use the Kali Live boot with persistence USB stick, and the Alfa Networks adaptor, to launch a Denial-of-Service attack on your own mobile phone (or smart TV etc) in order to prevent it accessing your home WiFi. its just a simulation so we only need 4 screenshots. I ordered my alfa networks adaptor but it got delayed with the shipment so now need help if you own one. ALFA NETWORKS ADAPTOR OR SIMILAR IS A REQUIREMENT

My WinCC SCADA server still has free tags available, and I want to bring a second Siemens-based machine online so I can capture its data in real time. Your task is to establish the link between that PLC and the existing WinCC installation, map the new tags, and build a clear graphical dashboard inside WinCC. Key points for the dashboard: • Parameters: Temperature, Humidity, Production Rate and Weight (displayed visually with live updating trends, status colours, and historical recall). • Layout: a clean graphical interface that fits naturally alongside the current WinCC screens. Once the PLC is communicating and the tags are confirmed, I’ll need: 1. A working WinCC screen showing both live values and 24-hour trends. 2. Basic alarm limits configured so out-of-r...

I have a small STM32-based prototype that needs a tidy firmware layer to read a digital sensor running off the 3.3 V rail and perform on-board data processing. The task is focused purely on sensor data acquisition and manipulation—no motor control or external comms stacks are required beyond whatever interface the sensor ultimately uses. Scope • Bring-up of the chosen digital interface (we will settle on the exact line once we start). • Continuous sampling with lightweight processing: basic filtering/averaging and a simple validity check. • A clean API or callback so the main application can fetch the processed values. • Well-commented C code in a CubeIDE or bare-Makefile project plus a short README explaining pin assignments, clock config, and how to rep...

I need a seasoned embedded-systems engineer to help me complete and refine firmware for an industrial solar tracking pilot we are about to install in the field. The hardware platform is an STM32-based control board that already handles basic I/O; what I need next is rock-solid actuator control logic and tight integration with the rest of the system. Key priorities • Linear-actuator position control is the single most critical feature. Accurate sun-tracking algorithms must translate to smooth, repeatable movement, end-stop detection, stall handling, and safety interlocks. • The board talks over a CAN bus to a Linux-based gateway. Your code should package position reports, health data, and fault codes into our existing CAN message set and respond to incoming commands in real t...

I need a compact, single-fire line smart light switch designed around the ESP32-C3, strictly for residential use and housed in a PC-V0 enclosure. Because there is no neutral wire available the power stage has to ride on the leakage current, so I am counting on a proven AC-DC buck such as the Hi-Link HLK-PM01 (or similarly tiny module) and a reliable bypass-capacitor network that keeps the MCU alive even with very light loads attached. Switching must be silent and fast: think BTA16 (or comparable TRIAC) driven through an opto-isolated MOC3041 gate. Absolutely no mechanical relays are allowed. Behind the faceplate, the board should hide an HLK-LD2410 microwave radar sensor; its trigger will be combined with a capacitive interface that recognises multiple touch points on the glass front. Sp...

I need a freelance Instrumentation Engineer who can mobilise to our site in Maharashtra straight away. The work centres around flow new facility setup for a juice-processing facility, so hands-on familiarity with installing, configuring and calibrating these instruments is essential. I’ll supply a detailed list of the exact brands and models we use once you’re on board. Your day-to-day tasks will include: • Pulling electrical and instrument cables, making the terminations and verifying continuity • Checking instrument communication loops and finalising the instrumentation and communication drawings in line with our standards • Verifying instrument settings, then running full calibrations to documented procedures • Confirming that all materials meet th...

I’ll be sending over prototype boards that plug into a Raspberry Pi. Your task is to put each unit through its paces, first on the bench and then as a fully-integrated stack with the Pi. I need clear evidence that the hardware is sound and that the firmware hooks behave as expected. Scope of work • Run functional, performance and compatibility tests on every board. • Validate data communication lines, check power-management behaviour under varying loads, and exercise the sensor-interface pins. • Write and deploy small test scripts on the Raspberry Pi to automate measurements, capture logs and flag anomalies. Basic GPIO, I²C/SPI, UART and power-rail observation will be part of the routine. • Document all findings: raw logs, annotated screenshots or sc...

I have an automated test environment built around NI-PXI, cDAQ, and cRIO hardware. The next milestone is to tighten up our GPIB layer in LabVIEW and be able to call it cleanly from TestStand sequences. Here is what I need from you: • Configuration – create or refine VISA-based VIs that recognise multiple GPIB instruments on power-up, apply the correct addresses, and expose error handling hooks for TestStand. • Data transfer – build reusable producer/consumer VIs that move data packets reliably at the required throughput, log them locally, and hand structured results back to TestStand for report generation. • Troubleshooting – diagnose intermittent bus errors, timing issues, and any driver conflicts on the host PC; document root cause and corrective ac...

Urgent Robotics Project Assembly (Mumbai) I am looking for a dedicated and experienced freelancer to assemble my robotics project. I already have: All required hardware components Open-source GitHub repository (with full wiring, connectivity details, and code) Previous freelancers attempted but failed to complete it. I now need someone reliable who can finish it properly. Scope of Work: Assemble all robotics components as per the GitHub documentation Ensure proper wiring and hardware setup Flash the SD card and enable SSH Push the provided code to the device Test and confirm everything is working Deliver the completed project to me Deadline: Urgent – Must be completed by Monday morning Location Requirement: Freelancer should be located near Mumbai Central &nd...

Project Title: 600VA Pure Sine Wave Offline UPS Design (STM32 Based) Project Description: We are looking for an experienced Embedded Hardware and Firmware Engineer to develop a 600VA Offline Pure Sine Wave UPS using STM32G030K6T6 microcontroller. We already have a working board. The requirement is to reverse engineer and redesign the same board properly for production with complete documentation and firmware. Technical Specifications: * Input: 230V AC, Single Phase * Output: 230V AC Pure Sine Wave * Battery: 12V 7Ah SMF * Topology: Transformer-based (Low Frequency) * Control: Fully STM32 controlled inverter logic Required Features: * Automatic changeover (Mains to Inverter) * Pure sine wave PWM generation via STM32 * 2-minute auto shutdown in backup mode * Low battery cutoff protect...

I have an existing Siemens S7 program that currently drives the machinery on a manufacturing production line, and I need the exact same functionality reproduced in RSLogix 5000 for an Allen-Bradley platform. The original code handles all real-time control for motors (G120), valves, position valves/solenoid. You will receive: • The complete Step 7 project archive, I/O tag list I/O list for RSlogix controller including the model numbers of the I/O What I expect back: • An RSLogix 5000 (Studio 5000) project file that mirrors the existing sequences, timers, and alarms. • A brief cross-reference document mapping every original S7 tag, DB, and FC to its new controller-scoped or program-scoped tags. • Confirmation the code compiles without errors on a ControlLogix ta...

Requirements: - Experience with NXP, STM32, EFR32 series - Hands on with Communication Protocols - Experience with RTOS - Great experience with Embedded C

I want to prototype a complete control package before we spend money on physical hardware. The goal is to simulate a variable-speed pump that fills and empties a mixing tank where several ingredients and chemicals are blended. The process has to run under a PID loop so that the pump never overshoots and puts us in a dangerous high-level situation. I have not settled on a brand yet, so you are free to build in Siemens, Allen-Bradley, Mitsubishi — whatever you feel will migrate cleanly to a real PLC later. What I do know is that I need a touchscreen-style HMI with, at minimum, the following elements: • Start / Stop buttons and a simple Min / Mid / Max selector for the pump speed • Live indication that the VSD pump is running • Animated or numeric tank level that...

I just need to remove a broken IC from a board and solder the new one

I need a compact, single-fire line smart light switch designed around the ESP32-C3, strictly for residential use and housed in a PC-V0 enclosure. Because there is no neutral wire available the power stage has to ride on the leakage current, so I am counting on a proven AC-DC buck such as the Hi-Link HLK-PM01 (or similarly tiny module) and a reliable bypass-capacitor network that keeps the MCU alive even with very light loads attached. Switching must be silent and fast: think BTA16 (or comparable TRIAC) driven through an opto-isolated MOC3041 gate. Absolutely no mechanical relays are allowed. Behind the faceplate, the board should hide an HLK-LD2410 microwave radar sensor; its trigger will be combined with a capacitive interface that recognises multiple touch points on the glass front. Sp...

We are seeking an experienced Hardware Development Engineer to lead the end-to-end hardware development of a consumer-grade embedded system. The role involves system-level architecture, component selection, schematic design, PCB layout, and hardware validation in collaboration with the firmware engineer. The engineer must strictly adhere to the milestone plan and deliverables outlined below. Key Responsibilities: - System-level hardware architecture and design freeze. - Component selection (MCU/SoC, power ICs, storage interfaces, wireless modules). - Schematic design and PCB layout (high-speed + mixed-signal, EMI-aware). - Power integrity, grounding, shielding, and DFM/DFA compliance. - Prototype fabrication support and manufacturer Q&A. - Hardware bring-up support and validation with...

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.