Raspberry Pi Projects

6-DOF ARM playing chess

I’m working on a small project where a 6-DOF robotic arm plays chess using computer vision and AI. The AI and computer vision parts are already complete. I now need help implementing the inverse kinematics that moves the arm based on the chess move outputs (e.g., moving from one square to another). Scope: The system is already detecting board states and generating move commands. Your task will be to handle the arm movement part — calculating and executing joint angles for pick-and-place moves. Technical Setup: Hardware: Raspberry Pi 5 and Arduino Uno (must work within these). Accuracy: ±5 mm positional precision. Speed: Each move should complete within 5 seconds. Communication latency: Under 100 ms between software and hardware. What I Need: Help with inverse kinematics implementation. Efficient, reliable motion control compatible with Raspberry Pi 5 + Arduino Uno. This is a focused, lightweight project — ideal for someone with experience in robotics control or robotic arm motion planning.

Home Assistant & Econet (Plum) integration

I have a basic Home Assistant setup on a local raspberry Pi, previously I had been able to interrogate and write to my Air Soutce Heat Pump settings through Modbus settings, I have now changed Heatpumps to a Grant UK Heat pump which has an ecoNET24 controller made by Plum. I’m looking for someone to code in the controller through the local hardwired connection to my Pi via a 485 adapter. Essential is to be able to see all values including flow and return values and compressor frequencies as well as an option to write to certain values to alter points etc. Initially looking to read only so any fees should be based on that only.

REAL MAGENTO DEVELOPERS ONLY

REAL MAGENTO DEVELOPER NEEDED — Stripe + Apple Pay ERROR FIX (NO MEETINGS) =========================================================================== Environment: Magento 2.4.3-p3 | PHP 7.4 | Plesk | Stripe v3.5.0 | Flutter 3.36 (iOS & Android) Summary: After a Flutter update and Stripe key refresh, Magento stopped creating or confirming payment_intents. Stripe logs show: - /v1/payment_methods → 200 OK - /v1/tokens → 200 OK but no payment_intent.create or confirm calls. Live: - Android guest card → fail - Android customer card → success - iOS guest + customer (card + Apple Pay) → fail MDEV (clone of live): - Klarna throws Zend framework errors - Disabling Klarna breaks all payments - Cart works, checkout fails - Stripe keys tested and valid Objective: Find and fix the Magento issue preventing payment_intent creation. No meetings, no calls — pure debugging and repair. Possible causes: - Stripe module conflict after Klarna failure - JSON vs HTML response mismatch (Flutter strict parsing) - Magento cache / DI issue after rsync - Payment method or webhook misconfiguration Deliverables: 1. Working payments (iOS + Android) 2. Stripe logs showing payment_intent.create + confirm 3. JSON-only API responses 4. Short fix log (root cause + fix summary) How to Apply: Send: 1. Example of a Magento + Stripe (Apple Pay or PI) fix you’ve done 2. Your debugging plan (5–10 lines) 3. How you’ll confirm PI creation is re-triggered from Magento This is a hands-on fix task. No meetings, no discussions. Only real Magento + Stripe experts apply.

opportunity

Website Developer Brief – Pi Ratio / The Math’s Surgery

About Pi Ratio / The Math’s Surgery: Pi Ratio is a maths education movement with a purpose — bringing clarity, confidence, and cultural relevance to maths. We work with students, parents, and schools to transform maths learning. Current Setup: We already have a live site → www.mathssurgery.com. The domain, content, and basic structure are there, but the site needs a serious relaunch for a 90-day brand push. What We Need: A website developer to either: Renovate the existing site (work with the current CMS/theme), OR Rebuild on a modern platform (WordPress, Webflow, Squarespace) — migrating content + domain — if that’s cleaner/faster in the long run. Core Deliverables: Homepage redesign: one clear message + one CTA (no clutter). Offers page: clear split for Schools / Parents / Students with CTAs. Booking + payment integration: Calendly (or similar) + Stripe/PayPal. Courses/products tidy-up: restructure, polish pricing/cards, hide anything not ready. Copy pass: fix typos + polish text for authority. Basic SEO setup: page titles, meta descriptions, sitemap, mobile optimisation. Analytics integration (Google Analytics / GA4). Delivery: in 2–3 weeks. Budget: £800–£1,200. What I’m Looking For: Experience upgrading or relaunching existing websites. Portfolio of professional, clean, user-friendly sites. Ability to advise on whether renovation or rebuild is the smarter option. Clear communication, realistic timelines, and professional approach. How to Apply: Share 2–3 examples of sites you’ve renovated/relaunched. Tell me briefly whether you’d renovate or rebuild mathssurgery.com — and why. Include your timeframe + breakdown of what’s included in your quote.

opportunity

CM5 Carrier (Integrated Gas / Audio / PIR / BME280) + 4× USB 2.x

Summary Production-ready carrier board for Raspberry Pi Compute Module 5 (CM5), powered by USB-C 5 V. All sensors are integrated on the PCB (no modules): MQ-2-class gas front-end with heater driver, MAX9814-class mic preamp + electret, PIR motion, and BME280 (I²C). USB is USB 2.0 only: CM5 USB2 host → 4-port USB 2.0 High-Speed hub → 4× Type-A ports with per-port power switching & protection. Includes a user push-button and RGB status LED on GPIOs. Must-Have Features • Compute: CM5 on mating connectors; follow CM5 datasheet pinout, GPIO_VREF rules, rail budgets. • USB: CM5 USB 2.0 host → 4-port HS hub (e.g., Microchip USB2514B or Terminus FE1.1S) → 4× USB Type-A; per-port VBUS switch (adj. ILIM), PPTC, VBUS TVS, ESD. • Integrated sensors: MQ-2-class gas + MOSFET heater + ADC path; MAX9814-class audio + electret; BME280 (I²C) for T/P/H; PIR (digital preferred). • User I/O: momentary push-button to GPIO22; PWR_Button (pin 92) to GND for soft power; RGB LED on GPIO5/6/13 (series resistors). • Manufacturing: schematic+layout sources, Gerbers/NC/IPC-356, fab & stack-up, impedance targets, BOM with MPNs, centroid, assembly drawings, 3D STEP. Reference Documents (must align) • Raspberry Pi CM5 Datasheet (27 Nov 2024). • Raspberry Pi CM5 IO Board Docs (27 Nov 2024). Proposal Checklist • EDA tool/version; 1–2 relevant USB2/PCIe + analog (audio/sensors) projects. • Your PIR approach (digital vs. discrete) with part suggestions. • USB per-port power path (switch, PPTC, TVS, ESD) and ILIM value you propose. • Timeline per milestone; fixed-price bid; two rounds of review included. Ref: Raspberry Pi Compute Module 5 Datasheet, 27 Nov 2024: https://datasheets.raspberrypi.com/cm5/cm5-datasheet.pdf Raspberry Pi Compute Module 5 IO Board documentation, 27 Nov 2024: https://datasheets.raspberrypi.com/cm5/cm5io-datasheet.pdf

Ircuit Board Design for Raspberry Pi

Project goal Design a circuit board with specified sensors compatible with a Raspberry Pi 5 Compute Module. Scope of work - Create schematics for the circuit board. - Design PCB layout including specified sensors. - Ensure connectivity for Raspberry Pi 5 Compute Module.

opportunity

Project GAMESPACE

An individual or a team may fulfil the project; however, we prefer a single point of contact to streamline our administration and ownership of this project. This project focuses on building and testing a reliable, secure, and standards-compliant device provisioning and operations system for the Games In Real Life platform. It requires implementing a complete lifecycle of device operations—from provisioning to live gameplay interaction—using MQTT, Node-RED, Raspberry Pi, and ESP32 devices, in accordance with the operational standards and procedures (SOPs) outlined in our SOP framework. The primary goal is to ensure that all clients can autonomously connect, authenticate, provision, synchronise, and operate within the defined environments. The contractor will deliver robust code, configuration schema handling, and documentation aligned with internal SOPs and deployment procedures. We are seeking an experienced freelancer to assist with an IoT project utilising Raspberry Pi and ESP32 devices. The ideal candidate will have expertise in setting up Node-Red for data flow and basic GUI design, as well as management and MQTT for messaging protocols. You will be responsible for integrating sensors and devices, ensuring seamless communication between components. A solid understanding of IoT architecture and troubleshooting is essential. This project requires creativity and technical skills to optimise performance. MUST HAVE Extensive experience with: -Raspberry Pi hardware/Coding -ESP32 Pi hardware/Coding -MQTT communications, protocols, and security -Node-Red Flow coding, best practices and GUI design -Networking, WiFi and TCP/IP GOOD TO KNOW: - NDA will be required to share additional information -The project will be paid based on agreed milestone achievement outcomes. -Some code has already been developed and tested - modifications will be needed -OPTIONAL: Hardware development and test site funding (TBD with short-listed freelancer) Technical Scope -Hardware: Raspberry Pi 4/5, ESP32 variants -Server Environment: Windows 11, Node-RED, Mosquitto MQTT -Communications: WiFi (GameSpaceSetup), MQTT secure topics -Provisioning: Dynamic SCHEMA-READ/WRITE, RESET, UPDATE -Gameplay: Triggered actions via JSON-formatted MQTT messages (e.g., RFID triggers, DEVICEPOWER, STATUSINDICATOR, VideoPlay) TECH SCOPE -Hardware: Raspberry Pi 4/5, ESP32 variants -Server Environment: Windows 11, Node-RED, Mosquitto MQTT -Communications: WiFi,+ TCP/IP, Mand QTT secure topics -Gameplay: Triggered actions via JSON-formatted MQTT messages (e.g., RFID triggers) STANDARDS: This project must align with: Games In Real Life - SOPs -DEVICE SCHEMA implementation -Messaging Protocols and JSON structures (DEVICERESPONSE, DEVICEOPSTAGS) -GameSite and GameSpace topic segregation -Security policies for MQTT access, file sync, and schema handling HANDOVER INCLUDES -Source code -OS images (RPi/ESP32) -Node-RED flows/GUI -Setup scripts -Documentation and guides

opportunity

Blockchain Developer Needed for Pi-Powered Prediction Market MVP

We are building an MVP for a prediction market platform designed for the Pi Network community. Users will access the platform through the Pi Browser and place predictions using Pi Network’s native coin (Pi). All the actual market logic—creating markets, placing predictions, resolving results—will run on the Polygon blockchain. We will be using UMA Protocol (LongShortPair and Optimistic Oracle) to ensure secure and transparent resolution, but users will never interact directly with Polygon or need MATIC; everything is handled by the backend. We need an experienced blockchain developer to help us complete the MVP by: Deploying UMA contracts on Polygon (testnet first, then mainnet). Connecting the backend so Pi user actions are processed on Polygon automatically. Setting up a secure gas wallet to handle Polygon transaction fees. Running full end-to-end testing with live Pi transactions. Providing basic documentation for future updates. If you have experience with Polygon smart contracts and backend integration, and ideally have worked with UMA Protocol or similar Oracle-based prediction markets, we’d love to hear from you. Estimated Duration: 3–4 weeks Start Date: Immediate Budget: $1,250–$1,500 CAD (milestone-based) Please share your experience, similar projects you’ve worked on, and your estimated cost and timeline.

Structural Engineer needed to review public art drawing

My name is Ed Crumpton and I'm an artist based in the South-West, England, UK. I am looking for a chartered structural engineer (with PI insurance) to support the delivery of Quay Sounds, an interactive public art sculpture which will be located in Barnstaple. The sculpture involves two horn-like copper forms (approx. 1.8m and 1.4m high, see attached photo) with a (stainless) steel internal frame, anchored into a concrete pad (installed by council contractors). In the safety of the public, I need to know that what I will be constructing won't fall over or fail over its 20 years life. Therefore, I have thought that working on the following will make clear what I need to look into - This is the scope of Work: - Review provided drawings (I can have the Rhino CAD file which I will send over if you can help) and material details. - Provide structural calculations and report in line with Eurocode standards (EN 1990, EN 1991, EN 1993, EN 1997). - Confirm the suitability of using galvanised steel vs stainless steel for the internal frame. - Assess the copper cladding shell and advise on fixing point suggestions. - Advise/Desgin on the best method to attach the structure to the floor (anchoring/fixings). Specify materials to ensure a 20-year design life (including considerations for marine exposure, corrosion, vandalism, and thermal expansion). Provide signed documentation with Professional Indemnity insurance. Important Notes: Copper cladding is non-structural, but advice is needed on its attachment method to the frame. I have found that the Statue of Liberty is actually a good example to reference. The North Devon Council will design the foundation. Deliverables: Structural calculation report and compliance certificate. Advice on structural frame material, anchoring, and copper reinforcement. Anchorage load data for council contractors. If you can help me with this, that would be very much appreciated. Thank you, Ed

opportunity

MQTT best practices - Local LAN with NODE-RED

Secure MQTT Setup for IoT Devices Project goal Implement best practices for a secure and efficient MQTT environment to enable seamless device communication and authentication. Scope of work - Set up MQTT Broker on a dedicated Windows computer. - Enable Raspberry Pi and ESP32 devices to connect and authenticate without password disclosure. - Ensure secure communication between devices and MQTT Broker. - Implement authentication for devices on the production MQTT Broker. - Follow SOPs and operations for device communications. Read more Additional information - Node-Red flow example provided and tested. - Documentation, code examples, and required assets are complete. Platform Raspberry Pi, ESP32 Developer expertise Networking, IoT Budget $300 Deliver on July 24, 2025

opportunity

MVP Smart Contract & Backend on Polygon (UMA Protocol)

PredictPiX is a decentralized prediction market platform where all user transactions are conducted using Pi Network's native currency. Users engage with the platform through the Pi Browser, and all prediction market logic, including creation, resolution, and settlement, is powered by smart contracts deployed on the Polygon network. UMA Protocol's Optimistic Oracle and LongShortPair contracts will be used to ensure secure, decentralized resolution, unless the selected developer has another option that they are more familiar with. We have no interest in AMMs or liquidity pools. All blockchain gas fees are paid from a dedicated wallet owned by us, which is auto-funded via a % of platform fees. Objective: We are seeking a qualified blockchain developer to: Deploy UMA's LongShortPair smart contracts and Optimistic Oracle on Polygon. Integrate smart contract calls into our existing backend. Implement backend wallet logic to pay Polygon gas fees from our owned wallet. Ensure full alignment with Pi-only frontend logic (users never interact with Polygon or MATIC). Scope of Work: Smart Contract Work Deploy and configure UMA LongShortPair and Oracle contracts on Polygon mainnet. Create 2–3 example markets with testable endpoints for prediction and resolution. Backend Integration Modify existing backend to: Translate Pi user actions into Polygon contract calls Handle predictions, resolutions, and result retrievals Connect to PI Network with wallet and transaction abilities through their SDK Implement wallet gas fee automation (including tracking and auto-funding) Testing & Deployment Full testing with mocked and live Pi transactions Documentation for admin and future devs Optional (but preferred): Security best practices for gas wallet protection Transaction logging and error handling Deliverables: Deployed and verified contracts on Polygon mainnet Updated backend codebase with contract interaction logic Working front and backend integration Gas wallet automation logic Basic admin dashboard or CLI for market creation and resolution control Deployment and testing documentation Timeline: Estimated completion: 3–4 weeks Start date: ASAP Budget: Open to proposals, but targeting $1,000 - 1,375 CAD for MVP build (milestone-based). We would like to offer partial payment in PI to interested Devs. To Apply: Please submit: A short proposal outlining how you'd approach the project Your estimated cost and timeline

Breadboard Prototype for Wearable Device (with Wiring & Pin Map)

I need someone to build a complete breadboard prototype for a wearable device called ShiftAid. The prototype will include all components listed below, and I want a clear wiring diagram, pin mapping, and basic testing setup so I can use it to write my code. ⸻ ✅ What You’ll Deliver • Full breadboard wiring diagram • Resistors included where required • A labelled GPIO pin map for the Raspberry Pi Pico W • Breadboard-ready schematic • Photos or render of breadboard layout (Fritzing preferred) • List of components used (with optional links) • Optional: short MicroPython or CircuitPython test code for buttons, LED, and display ⸻

Rasberry pi 4 - OpenMPTCProuter and VPS

Looking for someone to bond multiple internet connections to build one strong connection for my livestream. Want it all setup so I just power it on and it works.

opportunity

MVP Smart Contract & Backend on Polygon (UMA Protocol)

PredictPiX is a decentralized prediction market platform where all user transactions are conducted using Pi Network's native currency. Users engage with the platform through the Pi Browser, and all prediction market logic, including creation, resolution, and settlement, is powered by smart contracts deployed on the Polygon network. UMA Protocol's Optimistic Oracle and LongShortPair contracts will be used to ensure secure, decentralized resolution, unless the selected developer has another option that they are more familiar with. We have no interest in AMMs or liquidity pools. All blockchain gas fees are paid from a dedicated wallet owned by us, which is auto-funded via a % of platform fees. Objective: We are seeking a qualified blockchain developer to: Deploy UMA's LongShortPair smart contracts and Optimistic Oracle on Polygon. Integrate smart contract calls into our existing backend. Implement backend wallet logic to pay Polygon gas fees from our owned wallet. Ensure full alignment with Pi-only frontend logic (users never interact with Polygon or MATIC). Scope of Work: Smart Contract Work Deploy and configure UMA LongShortPair and Oracle contracts on Polygon mainnet. Create 2–3 example markets with testable endpoints for prediction and resolution. Backend Integration Modify existing backend to: Translate Pi user actions into Polygon contract calls Handle predictions, resolutions, and result retrievals Connect to PI Network with wallet and transaction abilities through their SDK Implement wallet gas fee automation (including tracking and auto-funding) Testing & Deployment Full testing with mocked and live Pi transactions Documentation for admin and future devs Optional (but preferred): Security best practices for gas wallet protection Transaction logging and error handling Deliverables: Deployed and verified contracts on Polygon mainnet Updated backend codebase with contract interaction logic Working front and backend integration Gas wallet automation logic Basic admin dashboard or CLI for market creation and resolution control Deployment and testing documentation Timeline: Estimated completion: 3–4 weeks Start date: ASAP Budget: Open to proposals, but targeting $1,000 - 1,375 CAD for MVP build (milestone-based). We would like to offer partial payment in PI to interested Devs. To Apply: Please submit: A short proposal outlining how you'd approach the project Your estimated cost and timeline Any questions or assumptions you'd like clarified

opportunity

Custom Android ROM for Raspberry PI 5.

Require an Custom Android Image to be compiled for the Raspberry Pi 5 ARM64 environment. Requirements include: - Must be allowed to be distributed commercially on a Raspberry Pi 5 platform - Must support Qt runtime environment for playstore apps that require Qt environment - Bluetooth, Location services and GPS support - USB Serial capabilities - Rooting must be a possibility as some APK's will require access to Raspberry Pi Os for shutting the device down. - DSI Display support would be great! - Custom boot animation zip must be included in the compiled image Playstore access is not required as this is a standalone offline kiosk app.

Self hosted podcast recording & RSS URL hosting

Using a public google I cal url to trigger recording to ffmpeg for each calendar event and make folder and recording each episode to that folder weekly. provide aq public URL RSS address for that folder so I can use on my website to feed podcast episodes, I have been able to make everything and its quite quick, but the issue im having is making podcast generator or Castopod public, I don't want to port forward as I wish to use the host machine at the studio. I had been using cloud flare and duck dns to create a tunnel but will need a permeant free one made. 60 second recording test once on boot. automatically boots script on power up. no port forwarding , use at any location . Raspberry Pi3 with local external storage to host public mp3 from stream recording. maybe 30-60 minutes work . will provide remote log in on the Pi 3 Thank-you for your interest, possible regular monthly maintenance work plus small other projects if the first job works out well.

Raspberry Pi 3, 4, and 5 Software Development

UPDATED (Flowchart) We require a skilled freelancer to develop Raspberry Pi 3, 4, and 5 software that meets the specified functional requirements. The software should interact with various hardware components, process data efficiently, and ensure smooth operation on all specified Raspberry Pi models running the latest Raspberry Operating System. Fundamentally, a scripted setup for Raspberry Pi hardware to automate being added a specific environment, and this initial setup should be automated as much as possible, ready for further configuration tasks. MUST be compatible and work with Node-Redscape as a priority (see references below). Rsync automation initially to copy specific files to assist with setup (if needed)

opportunityurgent

I need to assemble a widget for an interactive piece of theater

Looking for a London-based hardware maker with experience in ESP32, LED control, haptics, and enclosure prototyping. Bonus if you’re into retro/interactive design. Goal is to prototype a handheld controller with crank, LED buttons, and sensors. I have the project thought out in ChatGPT and most of the pieces sourced. Need someone with experience to assemble this and program it. Happy to go with another design if the GPT thing isn't up to your specs. This is for a hybrid live/metaverse musical and the widget will control the audience's interaction with the piece. We are a disability/accessibility forward production with funding. If you want to be involved in the future of interactive theater and entertainment, please get in touch. Happy to negotiate price. Here's a list of components suggested by GPT (based on my needs): 1. Hardware Components You'll need: Microcontroller (e.g., Arduino, ESP32, Raspberry Pi Pico) Haptic Feedback Motor (e.g., vibration motor or haptic actuator) LEDs (RGB or standard) Buttons (momentary push buttons) Rotary Encoder / Crank Sensor (to detect movement of the crank) Wireless Communication (Bluetooth, Wi-Fi, or RF module) Power Supply (battery-powered or wired)

opportunity

RFP – PI Network-Based Event Prediction DApp

We are looking for an experienced blockchain developer or a small development team to build a streamlined event prediction market MVP within 4–6 weeks. The platform will leverage PI Network wallets exclusively for user deposits, withdrawals, and authentication, with backend processes executed efficiently using Polygon blockchain smart contracts. Estimated Budget: $2500 - $3,000 CAD (negotiable based on experience and proposal quality) Scope of Work The MVP must provide essential prediction market functionalities with a strong emphasis on simplicity, user-friendliness, and compliance: Core Functionalities Event Prediction Engine (Binary Outcomes) Users predict YES/NO outcomes on predefined events using PI. Events approved and managed via admin interface. PI Network Wallet Integration Seamless deposit and withdrawal via PI Network Wallet. PI transactions managed securely off-chain until settlement. Polygon Smart Contracts Simple, transparent smart contracts for outcome verification and PI settlement. Backend covers blockchain gas fees (no user-facing MATIC fees). Admin Dashboard Interface for managing events, user disputes, and monitoring transactions. Admin approval required for event creation to ensure compliance. Automated Market Settlement Settlement initiated automatically based on user consensus. Admin intervention for resolution disputes. Technical Requirements Blockchain & Wallets: PI Network Wallet SDK, Polygon Blockchain (Solidity), Web3.js/Ethers.js Backend: Node.js or Python (FastAPI/Django), PostgreSQL/MongoDB Frontend: React.js/Vue.js compatible with PI Browser Open Source Usage: Preference for legally licensed or open-source libraries Compliance and Regulation The platform must adhere strictly to all applicable regulations and best practices regarding blockchain and prediction markets. Explicit gambling terminology is to be avoided; use "event prediction" or "forecasting" instead. Compensation & Partnership Options We offer flexible compensation structures: Milestone-based Payments Partial or full compensation in PI (optional) Opportunity for long-term partnership with a potential revenue-sharing model We seek practical, efficient, and regulation-compliant solutions with an open and collaborative development approach. Interested developers or teams are encouraged to propose their preferred working arrangements and provide examples of relevant previous projects.