Freelancer vs Upwork (2026)
Freelancer vs Upwork (2026) - An Honest, Side-by-Side Comparison for Businesses and Freelancers
Microcontrollers are small yet powerful pieces of hardware that have the ability to control sophisticated systems. These microcontrollers are miniature computers with a processor, memory and input/output facilities that act as the brains of various systems such as gaming consoles, automobiles, and medical equipment. The programs for these microcontrollers are written by experienced and skilled developers who specialize in this area known as Microcontroller Developers. With the help of a microcontroller developer, a business can create various automation solutions for their products in order to increase productivity and efficiency, as well as help reduce costs.
Here's some projects that our expert Microcontroller Developers made real:
As you can see, our Microcontroller Developers' speciality is implementing versatile solutions that are both technically sound and cost effective. Our developers also possess an in-depth knowledge of multiple integrated circuit technologies to develop future ready systems that possess scalability as well as maintainability. With our Microcontroller Developers' help, your business can create sophisticated products and applications without the overhead of costly implementation.
Overall, the benefits offered by seasoned Microcontroller Developers can be the big push your business needs to develop advanced yet cost effective products. We invite you to enlist the services of one of our experienced Microcontroller Developers today to create a revolutionary product! Visit Freelancer.com now to post your project and get started on creating something special.
De 40,532 opiniones, los clientes califican nuestro Microcontroller Developers 4.84 de un total de 5 estrellas.Microcontrollers are small yet powerful pieces of hardware that have the ability to control sophisticated systems. These microcontrollers are miniature computers with a processor, memory and input/output facilities that act as the brains of various systems such as gaming consoles, automobiles, and medical equipment. The programs for these microcontrollers are written by experienced and skilled developers who specialize in this area known as Microcontroller Developers. With the help of a microcontroller developer, a business can create various automation solutions for their products in order to increase productivity and efficiency, as well as help reduce costs.
Here's some projects that our expert Microcontroller Developers made real:
As you can see, our Microcontroller Developers' speciality is implementing versatile solutions that are both technically sound and cost effective. Our developers also possess an in-depth knowledge of multiple integrated circuit technologies to develop future ready systems that possess scalability as well as maintainability. With our Microcontroller Developers' help, your business can create sophisticated products and applications without the overhead of costly implementation.
Overall, the benefits offered by seasoned Microcontroller Developers can be the big push your business needs to develop advanced yet cost effective products. We invite you to enlist the services of one of our experienced Microcontroller Developers today to create a revolutionary product! Visit Freelancer.com now to post your project and get started on creating something special.
De 40,532 opiniones, los clientes califican nuestro Microcontroller Developers 4.84 de un total de 5 estrellas.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’m integrating a NEMA-17 stepper into a small robotics prototype and need reliable position feedback. My current hardware stack is an Arduino Uno, a standard A4988 driver, and an incremental rotary encoder mounted on the motor shaft. What I need from you is a clean, well-commented sketch that: • Drives the stepper using the A4988, • Reads the encoder in real time, • Reports absolute position (in steps or degrees) over Serial, and • Lets me set a target position via Serial and have the motor move there, stopping within one encoder count. Please include a brief wiring diagram (hand-drawn or Fritzing is fine) so I can replicate your setup, and note any libraries you rely on beyond the Arduino core. I’ll consider the job complete once the code compi...
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 have a commerical infrared device I want to push beyond its stock limits by unlocking and fine-tuning the voltage-gating parameters, and explore any additional user-interface controls that govern current (U/I). My end-goal is better overall performance without compromising stability or safety. You will need to access an unknown programmer interface via a 6-pin connector, determine the language, locate the relevant developer-level menus etc, and apply changes. Experience with low-level hardware interfaces a must. Acceptance criteria: • Device boots and functions normally after modifications • Voltage and current settings report the new, target values • Device test and verification prior to final payment • Some minor hardware modifications may be necessary (pr...
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 ...
Project Goal: I am building a high-performance, wrist-mounted smartphone featuring a 15cm floating, interactive aerial display. I require a lead engineer to deliver a 100% functional, turn-key prototype that operates like a modern flagship smartphone, fully compliant with international safety and regulatory standards. Technical Requirements: Display Engine: Flat-top design. Use Micro-mirror Array Plate (MMAP/DCRA) + Folded Optics (Z or U-path) to project a high-definition image exactly 15cm into the air. Smartphone Architecture: ARM-based high-end SoC, 8GB RAM, 128GB Storage, Android AOSP. Connectivity: 5G/LTE module with eSIM support, Wi-Fi 6, Bluetooth 5.3, GPS/GLONASS. Hardware/Sensors: * Touch: LiDAR/ToF sensor calibrated for 15cm spatial interaction (zero-latency). Imaging: High...
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...
We are looking for a smart card specialist with proven experience encoding and programming IC cards using the ACS ACR38 Smart Card Reader. Please apply only if you have hands-on experience with smart card encoding and programming using ACR-series readers. This is not a general software development job. We specifically need someone experienced with IC card encoding/programming. Project Goal We need assistance to: Install and configure the ACR38 smart card reader on our computer Encode 5 sample IC cards containing user biodata Confirm that the encoded cards can be successfully read using our CRT-288 Creator Card Reader Train us on how to encode additional cards ourselves Sample Card Data Each card will store simple user biodata such as: Card ID Name Phone Number Age Gender The freelance...
I have an Arduino-based board that is powered from its own DC rail, yet it has to monitor several other DC lines whose grounds are completely separate. Right now I’m simply feeding each line through a voltage divider, and—unsurprisingly—the readings jump around or drift because the grounds are floating. The symptom is clear: inaccurate voltage readings that make the data unusable. What I need is a clean, reliable way to sense those isolated DC voltages without tying the reference points together. Whether that means introducing isolated amplifiers, optocouplers, tiny transformers, or another proven technique is up to you; I’m open to whichever approach gives stable, repeatable results and keeps the measurement side safe for the microcontroller. Here’s what I&...
Project Details ₹600.00 – 1,500.00 INR Bidding ends in 6 days, 22 hours Project Scope We would like to proceed with the prototype development of the SoilKare Agricultural Monitoring & Crop Quality Device as described in the engineering specification document we shared earlier. The system includes the following main subsystems: • STM32-based embedded controller • LTE communication module (SIM7600 or equivalent) • Soil monitoring sensors (pH, EC, moisture, temperature) • Water quality sensors (pH, EC/TDS, temperature) • Crop / leaf health sensors (chlorophyll / multispectral sensor) • Agricultural produce quality testing sensors (Brix, nitrate, crop moisture) • External ADC interface (ADS1115 or similar) • RS-485 interface for ind...
Project Scope We would like to proceed with the prototype development of the SoilKare Agricultural Monitoring & Crop Quality Device as described in the engineering specification document we shared earlier. The system includes the following main subsystems: • STM32-based embedded controller • LTE communication module (SIM7600 or equivalent) • Soil monitoring sensors (pH, EC, moisture, temperature) • Water quality sensors (pH, EC/TDS, temperature) • Crop / leaf health sensors (chlorophyll / multispectral sensor) • Agricultural produce quality testing sensors (Brix, nitrate, crop moisture) • External ADC interface (ADS1115 or similar) • RS-485 interface for industrial sensors (Modbus RTU support) • Camera module for pest detection (ima...
I need help turning three off-the-shelf modules now sitting in my glasses prototype—a USB 2.0 hub, a USB audio codec (mic plus stereo out) and a dual-channel Class-D amplifier—into one long, narrow board that can slide inside the temple arm. The space I have measured is roughly 80 mm × 15 mm, so the layout has to be linear rather than squarish, with components placed to keep the height profile as low as practical. The board will run exclusively from the host’s 5 V USB rail; no batteries or additional supplies are planned. Because this is for voice prompts and basic media playback, a standard-grade codec is fine—I’m not chasing audiophile specs, just dependable microphone input and clean stereo output that won’t hiss or pop when the amp is idle. A...
I need help turning three off-the-shelf modules now sitting in my glasses prototype—a USB 2.0 hub, a USB audio codec (mic plus stereo out) and a dual-channel Class-D amplifier—into one long, narrow board that can slide inside the temple arm. The space I have measured is roughly 80 mm × 15 mm, so the layout has to be linear rather than squarish, with components placed to keep the height profile as low as practical. The board will run exclusively from the host’s 5 V USB rail; no batteries or additional supplies are planned. Because this is for voice prompts and basic media playback, a standard-grade codec is fine—I’m not chasing audiophile specs, just dependable microphone input and clean stereo output that won’t hiss or pop when the amp is idle. A...
A new Siemens-based material-handling line is ready for commissioning and I need a clean, well-structured PLC project that focuses on data acquisition and logging. The controllers are Siemens S7 (TIA Portal) and the HMI layer will sit on WinCC (Unified or Classic—whichever you are most comfortable with). Core objective Capture and store real-time Operational status from drives, conveyors, and sensors so that maintenance and performance dashboards can draw from a reliable historical database. Inventory levels and movement tracking may be added later, so please structure tags and DBs with scalability in mind. Scope of work • Write the PLC logic that collects the required status bits, words, and alarms. • Build WinCC screens for live visualization, manual overrid...
I’m building an educational, IoT-enabled play mat designed especially for children aged three to five. When a child steps, taps or sits on different zones, I want the mat to recognise the interaction and trigger playful learning responses—lights, sounds or messages sent to a companion mobile app. Here’s what I need from you: • Hardware logic so each zone on the mat can reliably detect pressure or touch and send that data wirelessly. • Firmware that converts those raw sensor readings into tidy, low-latency events the app can understand. • Simple proof-of-concept software (mobile or web) that shows the events, plays a sound or displays a visual so I can demo the core learning activities. I’m open on the exact platform; ESP32, Raspberry Pi Pico W ...
I need a complete driver—both hardware interfacing notes and production-ready firmware—that talk to and power a 24-bit parallel RGB888 TFT LCD for displaying ONLY one colour across the entire screen at time. Scope • Hardware side: deliver a working MVP prototype driver for the display Maxen MX-B10HR501K-IS23 (datasheet attached), plus a concise schematic and BOM I can drop into Altium. • Firmware side: deliver clean, well-commented C/C++ code that initializes the panel, streams frame data at full 24-bit depth, and exposes a callable colour-calibration routine. Key requirements • Works with a standard RGB888 timing spec (VSYNC, HSYNC, DE, PCLK). • Runs on STM32 and TPS651 (Open for sugestions). • Colour calibration must let me adjust gamma an...
I need a self-contained unit that lets me key a number on a small touch screen and see that exact value appear instantly on a free-standing LED numerical tower. The goal is true plug-and-play functionality: once mains power is connected, the system should be ready without additional setup, drivers, or calibration. Core requirements • Input: a touch-screen number pad that accepts whole numbers (ideally up to four digits). • Display: an LED tower that shows the number in bright, easily readable digits; the tower must refresh in real time as I enter or change the value. • Form factor: bench-top or floor-standing, compact enough for shop-floor use, with a single power lead and a secure data link between screen and tower. • Reliability: stable operation for 8+ hours...
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...
Embedded Hardware & Firmware Expert Needed for Industrial 3-Phase Pure Sine Wave Inverter Project Overview: I am seeking an experienced Power Electronics and Embedded Systems Engineer to design the hardware and firmware for an Industrial-Grade 3-Phase Pure Sine Wave Inverter. The project involves designing multiple PCBs (MCU Motherboard, IGBT Driver, Thyristor Driver, and Sensing Interface) and developing robust firmware for system control, monitoring, and HMI integration. 1. Hardware Specifications & PCB Requirements: You will be responsible for designing the following industrial-grade PCBs: • MCU Motherboard: Based on Texas Instruments (TI) or Microchip architecture. Must handle PWM modulation and system logic. • IGBT Driver PCB (3-Phase): Industrial grade, optimized fo...
I am looking for an embedded systems developer to write Arduino code to communicate with the MCP3903 energy measurement IC from Microchip using the SPI interface. The goal of the project is to read voltage measurements from three channels of the chip and output the values through the Arduino serial monitor. Hardware: Arduino board (Arduino Uno or compatible) MCP3903 analog front-end IC SPI communication Requirements: The code should: Initialize SPI communication between Arduino and the MCP3903. Configure the MCP3903 registers correctly for basic operation. Read measurement data from the following channels: CH0 CH1 CH2 Convert the raw ADC data into readable voltage values (or at least raw measurement values). Print the measured values continuously to the Arduino Serial Monitor...
I want to build a small, self-contained charging station that wakes up only when it “sees” a bottle and a can. The core will be an Arduino (any recent 32-bit board is fine) tied to a solar panel and battery pack. A lightweight AI vision module or camera running something like TensorFlow Lite or OpenCV should continuously—or on a duty-cycled basis—look for bottles. The moment a bottle is detected, the system must move straight into the charging routine without waiting for external confirmation; no alerts, no logging, just automatic activation. What I need from you • Complete Arduino firmware that integrates the vision trigger with the charge-controller logic. • A schematic / wiring diagram showing how the camera, solar panel, charge controller, and any...
I have already drafted a full specification for a simplified television remote control aimed at older users, complete with ergonomics, button layout, and overall product vision. While I finish the patent application, I now need a skilled partner to bring the electronics and software to life. On the hardware side, the priority is circuit design. I will share detailed functional blocks, power-budget targets, and regulatory constraints; you would translate these into a clean schematic that is ready for board layout (I will also welcome help on the actual PCB routing once the schematic is locked). For software, I need both the embedded code that will run on the microcontroller and the on-screen user interface logic that appears on the TV. Simplicity and reliability for elderly users are the ...
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...
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 ...
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.
Freelancer vs Upwork (2026) - An Honest, Side-by-Side Comparison for Businesses and Freelancers
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