Arduino Jobs

I need a concise Arduino Uno sketch that drives my Nema 34 stepper through its existing driver in a continuous loop with the following timing: • From home, turn 60° clockwise and hold that position for one second. • Return to the home position and pause one second. • Turn 60° anticlockwise, pause one second, then repeat the entire sequence indefinitely. Please base the calculations on a typical 200-step Nema 34 (1.8° per step) unless I can later change a constant for different micro-stepping settings. No sensors or limit switches are required; it is pure open-loop control. Alongside the .ino file, include a clear wiring diagram that shows the connections between the Arduino Uno, my stepper driver, power supply, and any needed resistors or opto-isolators so...

i need a .vex file produced for a transmitter we sell to iBwave software users

Description: I need a mobile app developer to build a simple prototype app for a clip on spectrometer device that detects fake drugs and food. The device connects to a phone via Bluetooth and sends 18 channels of spectral data. The phone camera captures a Raman spectrum image. The app compares the data to an offline database and shows a simple Green (genuine) or Red (fake) result. What the app needs to do: Connect to an ESP32‑S3 device via Bluetooth Low Energy (BLE) Send a "START_SCAN" command to the device Receive 18 numbers (NIR spectral data) from the device Open the phone camera to capture a Raman spectrum image Compare both data sets to a local offline database Display a result: Green (genuine) or Red (fake) Save scan history locally Requirements: Experience with...

I already built the user interface in SquareLine Studio for an Elecrow 7" CrowPanel (ESP32-S3). The layout consists of four full-screen background images with four transparent touch buttons placed on top. Pressing a button should simply toggle a corresponding light by driving one of the three external relays wired to the CrowPanel’s GPIOs; touching it again turns the same light back off. What I still need is the firmware that ties everything together: • Import the SquareLine-generated LVGL project, read the touch events, and link each of the four on-screen buttons to its relay output. • Drive the relays through ESP32 GPIOs with proper debouncing and visual feedback on the button (e.g. highlighted state while the light is ON). • Provide a clean PlatformIO o...

I already have a custom carrier board laid out, but the power section needs a quick revision—the existing regulator must be swapped for a different power regulator before we move to assembly. The current design is finalized, but one power IC is out of stock and needs to be replaced with an available alternative. I’ll provide the current schematic, layout files (Altium/KiCad), and the BOM; your task is to integrate the new regulator, verify all power-integrity considerations, update the PCB documents, and get the board ready for manufacturing again. Once the hardware files are final, I’ll need help bringing the board up in software. Specifically, I’m looking for boot-ready firmware plus the low-level drivers required for the OS I’ll be installing in-house. The...

R7FS5D37A3A01CFP See my side hardware ready Actually my project . Collect data from plc and push into cloud server The plc have rs232 port some plc ds485 port Protocol may be modbus or some plc own . We give all format and structure Total 10 type of plc See . The collected data from plc push i into 4 sec interval to 3 location Ip address At the same time 1. TCP Ip format 2 location 104 format Maximum tags 100 from plc From that 100 tags 15 tags only we push 104 format See the main key point on ur code the ec200 module always connect with network more details will be shared with potential freelancer

R7FS5D37A3A01CFP See my side hardware ready Actually my project . Collect data from plc and push into cloud server The plc have rs232 port some plc ds485 port Protocol may be modbus or some plc own . We give all format and structure Total 10 type of plc See . The collected data from plc push i into 4 sec interval to 3 location Ip address At the same time 1. TCP Ip format 2 location 104 format Maximum tags 100 from plc From that 100 tags 15 tags only we push 104 format See the main key point on ur code the ec200 module always connect with network more details will be shared with potential freelancer

I need a compact controller board built around the STM32F103CBT6 in the 48-pin LQFP package (or a pin-compatible alternative with the same Cortex-M3 core). The board must expose three independent serial channels: • RS-485 • RS-232 • A UART linked to an on-board serial-to-TCP module that speaks plain TCP/IP Reliability is critical. Please integrate proven over-voltage, short-circuit and over-current protection on all power inputs as well as the three interface blocks. If you are more comfortable substituting a different F1-series part with identical footprints, that’s fine as long as the firmware and pinout remain drop-in compatible. Deliverables • Complete schematic (Altium, KiCad or EasyEDA) • Four/two -layer PCB layout with proper isolation be...

The lock is TuyaMCU based and uses WBR3 Wifi/BLE module which is based on RTL8720CF; TUYA IOT SDK V:2.3.1 rtl8720cf_common_lock_ty:1.1.16 pid:umca8uiv2203ua3k firmwarekey:key5943jddfsyeu3 v1:1.1.16 v2:1.3.9 Tuya-CloudCutter wont work as its not entering AP mode. Flashed OpenBeken FW, but cant set properdpIDs Thanks. I’m running a Tuya-based smart lock that currently relies on Tuya’s cloud, and I want it to function entirely inside my LAN. Lock, unlock, status, battery level—everything has to stay, but without any call home. What I need is solid API integration work. Whether you reverse-engineer the existing Tuya local protocol, pull the device keys, or wrap native commands in MQTT/HTTP, the outcome should be a clean local API I can hit from Home Assistant or a simple...

We are looking for a skilled and reliable KiCad developer/user for a potential long-term partnership. At the beginning, you will work in a trial/test period. We will give you a small KiCad task to evaluate your skills, work quality, communication, and reliability. Trial task: Use our Rounder for Tracks v3.2 KiCad plugin. Test it on a PCB with angled tracks. Check whether the tracks are rounded correctly. Try different plugin settings. Send screenshots after testing. Provide clear feedback about the results and any issues you find. If we are satisfied with your work, we will hire you for a long-term partnership and provide you with more KiCad-related tasks and projects on an ongoing basis. We are looking for someone who is interested in long-term cooperation, not just a one-time projec...

I need a complete IoT gateway hub that brings LTE (4G), Wi-Fi, Bluetooth, Zigbee and sub-GHz RF into a single, reliable unit for remote monitoring and alerting of smart-home devices. The goal is straightforward: gather data from a variety of in-home sensors and actuators, push it to the cloud over cellular when Wi-Fi is unavailable, and relay actionable alerts back to the user in real time. Here is what I expect: • Hardware design that accommodates the five radios with proper coexistence planning, power management and antenna layout. • Embedded firmware that can automatically select the best back-haul (LTE or Wi-Fi), maintain secure connections and expose a clean API or MQTT/HTTP interface for the smart-home layer. Also with bluetooth, zigbee and rf. • Delive...

I’m looking for an embedded-systems engineer who can take ArduPilot’s AP_Periph codebase and turn it into a robust CAN-bus battery monitor. The unit will sit on a DroneCAN network and stream full MAVLink telemetry, so it can slot straight into my existing ground-station setup without any extra protocol bridges. Integration with other telemetry options such as or SmartPort isn’t needed right now. Key functions I must see on the bus: • High-accuracy individual cell voltage for every cell in the pack (not just pack voltage) • Hall-effect current sensing that stays linear and low-loss all the way to 400 A • Standard AP_Periph health, identification and parameter handling so the flight controller recognises the device instantly Deliverables 1. Schemat...

Our sports venue runs on an ageing electronic scoreboard built around seven-segment LED and P10 LED panels. It still works, but erratically, and it can only be operated from the hard-wired control box bolted under the grandstand. I need the whole system modernised so I can walk onto the field with a phone or tablet and run the show from there. Scope of work • Inspect every board, power rail and driver on the existing hardware, replace any damaged or obsolete parts, and leave the display fully refurbished. • Design and build a new controller unit that adds rock-solid wireless connectivity plus a battery-backup circuit so a brief power loss never blanks the screen. • Write clean firmware for that controller, making sure it can address both the seven-segment digits and t...

I need production-ready firmware for a Renesas MCU that will exchange data through a Quectel EC200 cellular module using both IEC 60870-5-104 and plain TCP/IP protocols. The code must handle complete data transmission, reception, and on-board processing so the MCU can act as an intelligent field unit that talks reliably to a SCADA master as well as to standard IP services. Scope • Build or integrate a lightweight IEC104 stack alongside a TCP socket layer that can coexist without blocking. • Manage all EC200 interactions (AT commands, connection setup, keep-alive, error recovery) over UART/SPI as appropriate. • Implement configurable buffers, parsing, and frame validation so that raw sensor payloads can be wrapped/unwrapped for each protocol. • Provide hooks whe...

I already have the full mechanical side of a new, cost-effective outdoor vending machine—frame, actuators, motors, sensors, the lot. What’s missing is the electronic heart: a sleek touchscreen interface, a reliable controller, and rock-solid QR-code payment processing. Here’s what I need built and integrated: • A capacitive touchscreen (preferred size 7-10 in) that looks premium outdoors, survives glare and light rain, and gives a smooth, intuitive flow from product selection to checkout. • A central controller (Raspberry Pi, STM32, or a similarly capable board—open to your recommendation) that drives the existing motors and sensors, handles temperature monitoring, door locks, and any future add-ons. • QR-code payment only: the screen should dis...

Technical Specification: Inkjet DC Servo Motor Emulation via NEMA Stepper Motor (Closed-Loop Conversion)1. Project ObjectiveTo design and implement an electronic intermediary system (signal translator) to replace the original DC carriage motor of an inkjet printer with a NEMA stepper motor. The system must guarantee ultra-smooth, resonance-free linear motion and high-fidelity real-time positioning feedback to prevent the printer's mainboard from triggering a Carriage Jam or Fatal Error state.2. Block Diagram and Signal Flow ┌──────────────────────────────────────────────────────────┐ │ INKJET PRINTER MAINBOARD │ └───────────────┬──────────────────────────▲───────────────┘ │ │ [Integrated H-Bri...

I’m putting together a small robot that can be driven from a smartphone app so students can see core robotics concepts—actuators, basic kinematics, simple autonomy—in action. The emphasis is on clear demonstration rather than complex research, so I want a clean, reliable build that reacts instantly to on-screen controls. You’ll help me from design through to a working prototype. I’m open on the exact board and language (Arduino-Bluetooth, Raspberry Pi-Wi-Fi, ESP32, etc. all fine) as long as the final unit pairs quickly with an Android or iOS app and lets learners steer, change speed, and trigger at least one additional function (for example, a gripper or light). Because the real goal is teaching principles, I also need the code commented clearly and a short ...

I need a complete electronics solution that can replace the original EBB board on an Axidraw-style writing machine. The job covers both hardware and software. Hardware scope • Design a compact, two-axis motor-control PCB built around an ESP32. • Integrate two stepper-motor drivers capable of smooth, quiet motion at plotting speeds. • Provide a reliable USB interface for host control and firmware updates. • Include all required power-management, end-stop, and pen-lifter circuitry so the board can drop straight into an existing Axidraw frame. • Deliver production-ready assets: schematic (PDF & source), PCB layout, Gerber/Drill files, BOM with part numbers, and a brief assembly guide. Firmware scope • Develop firmware that exposes Axidraw-compat...

We are looking for a reliable AI Music Creator/Producer to create high-quality music based on themes and directions we provide. You will be responsible for: Generating AI music based on a given theme, mood, and reference. Selecting the best tracks from multiple generations. Listening to and quality-checking every final track before delivery. Identifying and rejecting tracks with strange sounds, unwanted vocals, glitches, poor transitions, excessive repetition, or other AI-generation issues. Making sure the music matches the requested mood and is suitable for professional use. Delivering only polished, high-quality tracks. Experience with tools such as Suno, Udio, or similar AI music platforms is preferred. Important: We are not looking for someone who simply generates tracks and sends ...

I’m building a mobile robot and need an ESP32-based physical hand-held controller that can drive it wirelessly via Wi-Fi or Bluetooth. The only actions the robot must respond to are Forward, Backward, Rotate Left and Rotate Right—no arm control for now. Here’s what I’m looking for: • Clean, well-commented firmware for both the remote unit and the robot side, written in Arduino IDE or ESP-IDF. • A lightweight, low-latency communication routine that keeps the link alive and automatically reconnects if the signal drops. • Pin mapping and a simple wiring diagram for the buttons, power, and any status LEDs you recommend. • Quick setup notes so I can flash the code and verify that each button triggers the correct motion. I’ll consider t...

I’m putting together a simple proof-of-concept: an XY plotter that uses stepper motors and a motor-driven cream / syringe head to write one predefined word on plain paper in four different sizes. The word and the sizes will be hard-coded for now; no live UI or font selection is needed. I just want to see smooth, accurate motion, clean cream extrusion, and clearly legible lettering in an “Elegant” style. Here’s what I need from you: • Mechanical design and parts list for the XY frame, rails, carriage, and syringe mount, all sized for an A4 sheet of paper. • Electronics schematic and firmware (Arduino + GRBL, or any open-source control stack you prefer) that drives two XY stepper motors plus a third actuator for the syringe. • G-code or equivalen...

I have a working surface-EMG biofeedback prototype that is almost ready for a clinical trial. My background is in Occupational Therapy, so I need a technically-minded partner to finish the engineering details. The prototype already captures clean EMG signals, but three areas still need work before it enters the clinic: 1. Fixing the vibration sensor • Diagnose the current instability (occasional dropouts and inconsistent amplitude) • Re-calibrate and, if necessary, replace the sensor so it triggers haptic feedback within 50 ms of threshold detection • Deliver updated firmware and wiring diagram 2. Building EMG display software for Windows • Real-time data visualization (raw signal and RMS/average) • Session recording to CSV or similar fo...

I am looking for an experienced embedded hardware and audio electronics engineer to replicate a custom automotive audio reverb/DSP module from scratch (0 to 100 delivery). The original circuit uses a Spin Semiconductor SPN1001-FV1 DSP, a Microchip MCP604 quad op-amp, and an external 8-pin EEPROM chip. I need a complete, end-to-end service: hardware reverse engineering, firmware dumping, PCB design, component sourcing, board assembly, and delivery of a fully functional prototype. Scope of Work & Deliverables: 1. EEPROM Firmware Extraction: Extract/dump the binary code from the 8-pin EEPROM chip on the provided reference board to preserve the custom reverb algorithm. 2. Schematic Capture & PCB Design: Recreate the schematic in EDA software (preferably KiCad or Altium) including the...

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.