I need an end-to-end solution that lets me monitor and, when necessary, remotely control a set of environmental sensors that report temperature, humidity, and air-quality data. Here is the flow I am envisioning: the sensors push readings to the cloud (MQTT, HTTPS, or another lightweight protocol you prefer), the data is stored and processed, and a desktop application then visualises the live feed, keeps historical logs, and lets me define threshold-based actions. Key points I care about • Real-time monitoring and control is the primary goal—latency needs to be kept low and reconnect logic must be solid. • Sensors involved: temperature, humidity, and air quality. The system should be flexible enough to add more sensor types later without a rewrite. • Deskt...
...soil-moisture readings and short-term weather data, while also generating three forward-looking insights: predicted soil moisture over the next 6–24 h, likely weather changes in that window, and the water volume the system will probably consume. • Control logic that blends those predictions with simple rule-based safeguards (e.g., prevent watering during rain, pause if flow sensor detects anomalies). • MQTT or HTTP messaging between ESP32 nodes and the Pi, with basic encryption, plus a clear JSON schema so I can expand the network later. • Deployment scripts, pinout diagrams, and concise documentation that let me flash a fresh ESP32, drop it in the field, and see it register instantly on the Pi dashboard. Acceptance criteria 1. End-to-end simulation (se...
...Open-Collector outputs with configurable timing (30–300ms). • Command Queueing: Safe handling of concurrent or rapidly incoming commands without interrupting an active pulse sequence. • Secure & Robust Communication: MQTTS/HTTPS with TLS 1.2/1.3, server certificate validation, and secure certificate storage. Implementation of proper MQTT QoS (Level 1/2), including duplicate message detection and rate limiting. • Reconnect Resilience: The device must safely handle MQTT session reconnects and message re-delivery without duplicate execution, ensuring consistent state across network drops. • Transaction Integrity & Persistence: Implementation of idempotent command execution. The execution state must be committed atomically t...
Embedded Firmware Engineer (ESP32-S3, MQTT/HTTPS, OTA, Local Installer Wizard) – Industrial Pulse Controller Description We are building an industrial Wi-Fi “pulse injector” controller (Payter/Nayax-like) for self-service car wash / vacuum stations. Customer scans a QR on the bay, opens our webapp, pays online, and the device generates configurable “coin pulses” (dry contact and open-collector) into the wash/vac controller. We need an experienced embedded engineer to deliver production-grade firmware for ESP32-S3 with: • Reliable Wi-Fi connectivity and auto-recovery • MQTT (preferred) or HTTPS command channel • Configurable pulse generation (timing, mapping, NO/NC/OC outputs) • Local Installer Wizard (AP mode + web UI) • ...
...soil-moisture readings and short-term weather data, while also generating three forward-looking insights: predicted soil moisture over the next 6–24 h, likely weather changes in that window, and the water volume the system will probably consume. • Control logic that blends those predictions with simple rule-based safeguards (e.g., prevent watering during rain, pause if flow sensor detects anomalies). • MQTT or HTTP messaging between ESP32 nodes and the Pi, with basic encryption, plus a clear JSON schema so I can expand the network later. • Deployment scripts, pinout diagrams, and concise documentation that let me flash a fresh ESP32, drop it in the field, and see it register instantly on the Pi dashboard. Acceptance criteria 1. End-to-end simulation (se...
...parsing ◦ Zero data loss under high load • Modbus RTU Master: ◦ Stable polling ◦ Configurable register maps for easy addition of new slave types • Integrations: ◦ MQTT with Home Assistant auto-discovery ◦ OTA firmware updates Dashboard • Frontend Stack: React, Vite, TypeScript, Zustand, Tailwind CSS • Build Optimization: vite-plugin-singlefile ◦ Single compressed HTML (~150 KB) • Hosting: Served locally from LittleFS • UX: ◦ Router-style captive portal for first-time provisioning ◦ Wi-Fi and MQTT setup without cloud dependency 5. Deliverables • Source Code: ◦ Full ESP32 firmware ◦ Complete React/Vite frontend project • M...
...Shopify’s JSON API and the hardware. Here’s what I already have and what I need from you: • Data source – Shopify: I only care about the store’s Total revenue figure. A lightweight call to the REST Admin API (or GraphQL if you prefer) is enough. I will supply the private-app credentials. • Destination – Hardware counter: It connects over Wi-Fi. You can target it with plain HTTP, WebSocket, or MQTT; whichever is simplest to flash onto a common ESP8266/ESP32 controller. I can handle the flashing if you give me the compiled binary or the Arduino/PlatformIO project. • Service layer: A Python, Node.js, or similar script that polls Shopify at a reasonable interval, parses the JSON response, and publishes the updated number to the device....
looking for an experienced OT / Industrial IIoT freelancer to develop a small on-premise technical demo (PoC) related to an automotive Paint Shop (Pre-Treatment & E-Coat). The goal is to demonstrate a realistic Industry 4.0 data flow, fully on-premise, without modifying PLC control logic, and aligned with industrial cybersecurity best practices.
I have an air-quality monitor prototype on breadboard and now need a production-ready PCB. The core of the board will be an Arduino Nano, linked to Wi-Fi for cloud logging and OTA updates. Only a particulate-matter sensor has to be integrated at t...or similar display. • All design files (KiCad or Altium), Gerbers, drill files, a fabrication drawing and an annotated, supplier-ready BOM. • Brief design notes that explain component choices, antenna clearance, power-budget calculations and how to reconfigure the spare headers for future gas sensing. Once I confirm the board boots, connects to Wi-Fi and streams raw particulate data over MQTT, the job is done. I’m happy to answer technical questions quickly so we can move from schematic to final Gerbers without unn...
... 1. Source code with Dockerfile and README for local spin-up 2. Deployed stack on my AWS account (API Gateway / Lambda or an EC2-based service, plus an RDS or DynamoDB backend) 3. Minimal front-end dashboard (React or simple server-rendered pages) styled just enough for internal use 4. Postman collection and API schema docs 5. One-hour hand-off session If you’ve connected hardware over MQTT, used AWS IoT Core, or have prior security/CISSP experience, please mention it—those skills will move you to the top of the list....
Je souhaite développer un système embarqué destiné à l’automatisation domestique. L’objectif est de concevoir une carte compacte capable de dialoguer, via des modules de communication sans fil, avec divers capteurs et actionneurs déjà présents dans la maison ou ajoutés ultérieurement. Le travail inclut...pour fabrication • Code firmware documenté, compilable sur la plateforme retenue (par exemple STM32 ou ESP32) • Script ou procédure de tests démontrant la fiabilité des transmissions sans fil • Guide de mise en service étape par étape La solution doit rester modulaire afin d’ajouter facilement de nouveaux capteurs ou actionneurs par la sui...
I’m building a live remote-monitoring dashboard that ingests MQTT messages from a teltonikak rtu 901 gateway along with temperature, pressure, and oxygen sensors and many other parameters from a controller. The stack I have in mind runs on DigitalOcean or AWS and is driven by Python on the back-end and JavaScript on the front-end, but I’m happy to discuss refinements if you can justify them. Current status • Devices is yet to publish raw readings over MQTT. • No cloud pipeline, storage layer, or UI exists yet. What I need next • A lightweight yet secure ingestion service (Python is preferred) that subscribes to the topics, validates payloads, and writes them to a scalable store on DigitalOcean. • A real-time dashboard in JavaScript th...
The goal is to deliver a complete, production-ready IoT platform that automates a home’s lighting and HVAC while responding flawlessly to Google Home voice commands. Core build • Firmware or edge-side code that speaks to smart switches, dimmers, thermostats and temperature sensors, ideally over MQTT or another low-latency protocol. • Secure cloud back-end (Node.js, Python, or comparable stack) with REST and WebSocket endpoints so the mobile or web dashboard stays in sync in real time. • Database layer for device states, schedules and user profiles; relational or NoSQL is fine as long as latency stays low. • Google Home Action integration, including OAuth flow and fulfilment webhook, so “Hey Google, set living-room lights to 30 %” or &...
...firmware and companion software that can collect sensor data, push it to the cloud, and expose a clean API for downstream analytics or dashboards. Core needs • Firmware or embedded code that runs stably on the target hardware (ARM-based MCU) • Edge logic for data aggregation, local caching, and basic alert rules • Secure OTA update mechanism and device provisioning flow • Cloud integration (MQTT or REST) with authentication and encryption in place • A lightweight monitoring dashboard or reference client that demonstrates data ingestion and control commands I already have hardware schematics and a basic data model. Your deliverable will be well-documented source code, build instructions, and a brief test report showing successful connectivity t...
I am setting up an ESP32 to drive an LED display and need reliable firmware that shows plain text messages received over MQTT. The messages will arrive in JSON format from my own application or directly through my broker; the code simply has to subscribe, parse the JSON, pull out the text field, and push it to the display. No animations or extra status indicators are required at this stage—just clear, readable text. Subscribe Topic : iot_display/application_to_display Publish Topic : iot_display/display_to_application Preferred tool-chain is Arduino IDE or PlatformIO with a familiar MQTT library such as PubSubClient or AsyncMQTT. Please keep the pin assignments and Wi-Fi credentials easily configurable in a header or defines section, and make sure the loop stays...
...solar plants. Project Objective To design and develop a custom SCADA-based Remote Monitoring System for solar power plants that enables real-time monitoring, analytics, alerts, and reporting. Scope of Work The freelancer will be responsible for end-to-end development, including: 1. Data Acquisition Integration with inverters, meters, weather sensors, SCBs, PLC/RTU Protocols: Modbus RTU / TCP, MQTT, OPC (preferred) 2. SCADA & Dashboard Development Real-time plant monitoring (DC/AC parameters) Plant-wise and inverter-wise dashboards Interactive charts & graphs (generation, PR, CUF, losses) 3. Monitoring & Analytics Energy generation (Daily / Monthly / Yearly) Performance Ratio (PR), CUF Equipment health monitoring Fault & alarm management 4. Alerts ...
...documentation and lightweight sample code that demonstrates how my developers can extend or modify the integration later. Successful delivery means I can walk through the warehouse, scan any tag, and immediately watch my dashboard update quantities and positions without refreshing or rescanning. If you already know your way around Zebra FX series readers, edge controllers, and standard tools like MQTT, WebSocket, or TCP sockets, we’ll be able to move quickly. I will supply current schema details and API endpoints as soon as we start....
...Implement: Vehicle Tracking: Real-time GPS tracking, trips, history, geofencing, alerts, speed monitoring IoT & Device Integration: MQTT connectivity, dashcam metadata, vehicle telemetry, sensors integration Web Dashboard: Fully SESLAA-branded portal with fleet management, analytics, reporting, alert management, and role-based access (Admin, Operator) Mobile Apps: Android and iOS apps for live tracking, alerts, notifications, and fleet management Analytics & Reports: Trip summaries, distance & speed analytics, event logging, notifications Alerts & Notifications: Geofence, overspeed, device offline, emergency alerts via email/push/SMS Security & APIs: Secure REST/MQTT APIs, HTTPS, JWT, and multi-device support Scalability & Future Integration...
...and determine its position inside a building by scanning nearby WiFi access points. Every 15-30 minutes (configurable) the unit must wake, calculate its coordinates, and post them to my cloud back-end. A single push-button on the device serves as a service call: when pressed it must instantly trigger two actions—send an email alert and push a notification to our web dashboard through a REST or MQTT endpoint. I am looking for a document set that details: • Hardware architecture: MCU, low-power WiFi module, antenna, sensor package, power source, and enclosure considerations • Firmware flowcharts covering WiFi scanning, interval sleep strategy, and button interrupt handling • Communication protocol, payload structure, and sample API calls for both perio...
...hardware: custom or off-the-shelf waveguide antennas, power supplies, shielding, whatever tightens SNR for indoor use. • Build or refine the firmware and host-side software that pulls radar IQ data, runs real-time signal processing, and outputs clear heart-rate, breath-rate, and motion metrics. Language is flexible—Python, C++, or Node.js are all fine—as long as the API you expose is REST- or MQTT-friendly for my platform. • Provide calibration procedures and a repeatable test routine so I can validate accuracy against reference devices. • Package everything so I can drop it into Docker and deploy to our edge gateway. Acceptance criteria 1. Continuous heart and respiratory rates with ≤ ±3 bpm / ±2 rpm error in a quiet room at 1...
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Hello, I am looking for someone who can write a program for an ESP32. I have an ESP32 wrover devkit c. I also have about 40 ledvance smartlights ble mesh (gu dimmable white). I have installed the nrf mesh app, but would like to have communication with my home assistant server. I would need an ESP program that can make a ble mesh network or can be integrated in one. The ESP will be directed by mqtt (home assistant server) and will than be able to put the lights on/off, change their colour, change the light intensity. The lights can be provisioned by the ESP, but if not possible, I can also do this myself by means of the nrf mesh app. I would need a program for a network that can contain about 40 lamps. We can do the test with 3 lamps. After a successful test, I will then add the res...
...core team specializing in full-cycle IoT and embedded product help startups, researchers, and companies turn ideas into fully working, production-ready IoT products, from PCB and firmware to cloud, AI, and mobile Core Expertise Covers the Entire IoT Chain-> Embedded Firmware DevelopmentSTM32, ESP32, Arduino, nRF, PIC, Raspberry PiBare-metal & RTOS (FreeRTOS)BLE, Wi-Fi, LoRa, MQTT, CAN, SPI, I²C, UARTSensor integration, power optimization, OTA updates-> PCB Design & Hardware EngineeringSchematic + PCB design (EasyEDA, Altium, KiCad)Single-layer to multilayer boardsBOM optimization & DFM/DFA supportPrototype-ready Gerbers & manufacturing files-> Cloud, Backend & AI IntegrationAWS, Firebase, custom backend APIsIoT dashboards & device managemen...
AWS IoT Core (MQTT) Integration – Smart Agriculture IoT Project Status Embedded firmware (STM8 + SIMCOM 7672 GSM): under development Mobile application: ready Web backend: under development Project Requirement Design and integrate AWS IoT Core (MQTT) backend Support GSM-based IoT devices Scalable architecture for multiple farmers and devices Scope of Work Create AWS IoT Core setup (Things, Certificates, Policies) Design MQTT topic structure (telemetry, commands, acknowledgements) Implement AWS IoT Device Shadow (desired / reported state) Command & ACK mechanism (no polling, offline device support) Fleet provisioning workflow for bulk manufacturing Configure AWS IoT Rules Integrate AWS IoT with Lambda and database Define App → Backend &ra...
...ThingsBoard Community Edition from scratch and tune it for production: PostgreSQL + TimescaleDB performance settings and backups enable user self-registration (/signup) Design architecture for real users (patients, doctors, trainers). Fully implement test data generator (Rule Engine + Script node) for algorithm debugging and demos (simulate P, Q, CO₂, O₂) Set up real data flow from physical device (MQTT or BLE via smartphone → ThingsBoard) Build beautiful, user-friendly dashboard (single template for all patients): real-time: P, Q, CO₂, O₂ charts large color indicator of current zone all visible in the official ThingsBoard mobile app. If you have experience deploying ThingsBoard for medical/breathing IoT devices — please share. Happy to see screenshots of similar d...
...generic. The container must host every bit of the optimisation logic; Home Assistant should interact with it only through a stable, versioned local API exposed on my LAN. Core capabilities I expect: • Optimise solar production in real time • Manage charge/discharge cycles for the household battery • Balance grid usage to minimise emissions and cost The add-on should support both REST and MQTT endpoints so I can choose the best fit for each automation. I also want the architecture ready for commercial rollout: semantic versioning, a straightforward update path, and hooks for future licensing or subscription checks (e.g., token validation at runtime). Deliverables 1. Production-grade Dockerfile and image published to a private registry 2. add-on manifest s...
...Local: Optimización para series temporales (5 sensores de suelo + caudalímetro por nodo). - Grafana: Dashboard de monitorización y panel de control de reglas dinámicas. - Python Engine (Core): Middleware para lógica de reglas, procesamiento de payloads y envío de comandos downlink (hexadecimal) para actuación sobre electroválvulas biestables de 5V. Requisitos Clave - Python Avanzado: Manejo de MQTT y lógica de control. - Protocolos: Experiencia con Modbus RTU over RS485 y tramas LoRaWAN. - Docker: Configuración de volúmenes, redes internas y persistencia en SSD. - Hardware: Control de GPIO y uso de Puente H (DRV8833/MX1508) para solenoides biestables. - Networking: VPN (Tailscale/WireGuard) y configurac...
I need a publication-ready article that shows how IoT-enabled embedded systems are reshaping urban life in 2026. The piece must weave together the nuts and bolts of communication protocols such as MQTT and CoAP, explain where edge-side AI fits in, and bring the narrative to life by zeroing in on three flagship use cases: predictive healthcare, energy-efficient grids, and autonomous transport. I want to strike the sweet spot between technical depth and readability so engineers, city-planners, and non-specialist decision-makers all come away feeling informed and inspired. Solid SEO matters too; the article should be structured with a clear H1, logical H2/H3 sub-heads, a concise meta description, and a handful of thoughtfully chosen keywords that help the piece rank for smart-city a...
...fabrication-ready Gerbers. Firmware Most peripherals run, yet the connectivity setup is unfinished. I need rock-solid provisioning, reconnection logic, secure MQTT transport, and OTA hooks added to the existing C/C++ codebase. App integration Once the device is talking over MQTT, wire the mobile app to those topics so live sensor data appears in real time and pairing is painless. Deliverables • Revised PCB files and Gerbers • Completed ESP32 firmware with reliable MQTT connectivity • Updated app build showing live data • A brief test report and production checklist Acceptance criteria: the board must hold a stable MQTT link for 48 hours straight, the app must stream data without drops, and all changes compile without warn...
Just Client connect with MQTT Broker
...of that data to the cloud or a self-hosted server so I can view it from anywhere. • A lightweight dashboard—web-based or mobile-friendly—that presents live readings, trends and simple analytics (averages, alerts when limits are exceeded, downloadable CSV). Please write clean, well-commented code (Python preferred, but I’m open to Node-RED or similar if it fits better), set up any required MQTT brokers, databases or APIs, and document the installation process so I can replicate it on additional Pi boards later. Deliverables 1. Source code and configuration files 2. Step-by-step setup guide with screenshots 3. Basic user manual for the dashboard 4. Short verification video that shows the system running and data appearing remotely ...
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...Backend + React Dashboard + n8n Automation Project Description We are looking for developer(s) to build an MVP of an industrial IoT platform focused on the aquaculture sector. The initial goal is to have a functional system using synthetic data for commercial demonstrations. Technology Stack (Defined): Backend API: FastAPI (Python) Database: PostgreSQL + TimescaleDB Data Ingestion: MQTT / HTTP Automation: n8n (open source) Frontend: React Real-time: WebSocket / SSE Infrastructure: Docker, Hetzner Cloud Expected Deliverables 1. Core Backend (FastAPI) REST API for sensor data ingestion Data validation and normalization Multi-tenant architecture (client isolation) Data traceability Authentication and authorization 2. Database ...
...lighting systems • Smoke control systems • Lift supervisory panel • Ventilation system • Public-address (PA) system • CCTV system • Sprinkler pump system Remote HQ updates HQ requires three data streams: 1) continuous status of the arm (position, task, faults), 2) instant alerts for any detected or confirmed fire, and 3) regular system-health/diagnostic packets. Push methods can be MQTT, REST, or another secure protocol you recommend, but latency must stay under five seconds for alerts. Acceptance checklist • Robotic arm completes a full patrol loop and logs data without manual input • Any subsystem alarm triggers an immediate HQ alert and on-screen confirmation locally and remotely • Manual override from HQ pauses ...
I need a production-ready SIAPP container that runs on the Siemens SICAM A8000 platform and acts as an MQTT client. The container must connect to a MQTT broker, read the A8000’s configured digital inputs, analog inputs and status signals, publish those values, and in the opposite direction subscribe to topics carrying status updates and control commands so the payloads can be written straight back into the matching SICAM signals. The work involves building the application on embedded Linux, packaging it as a SIAPP, and verifying it on real demo hardware. Clean logging, reconnect logic, and graceful handling of network interruptions are essential, as this will be deployed in an operational substation environment. SDK: Deliverables • Compiled SIAPP image
...lighting systems • Smoke control systems • Lift supervisory panel • Ventilation system • Public-address (PA) system • CCTV system • Sprinkler pump system Remote HQ updates HQ requires three data streams: 1) continuous status of the arm (position, task, faults), 2) instant alerts for any detected or confirmed fire, and 3) regular system-health/diagnostic packets. Push methods can be MQTT, REST, or another secure protocol you recommend, but latency must stay under five seconds for alerts. Acceptance checklist • Robotic arm completes a full patrol loop and logs data without manual input • Any subsystem alarm triggers an immediate HQ alert and on-screen confirmation locally and remotely • Manual override from HQ pauses ...
...dashboard versi pertama adalah menampilkan riwayat pengumpulan sampah agar pihak kebersihan dapat mengevaluasi pola angkut dan menyesuaikannya dengan cepat. Lingkup kerja yang saya butuhkan: • Rancang dan integrasikan rangkaian sensor ultrasonik (atau teknologi setara) untuk membaca tinggi sampah. • Kembangkan firmware agar sensor dapat mengirimkan data secara stabil—idealnya menggunakan MQTT atau protokol ringan serupa. • Buat backend dengan database terstruktur untuk menampung log riwayat pengumpulan dan endpoint REST/GraphQL sederhana. • Bangun dashboard web responsif yang memetakan lokasi tong, menampilkan grafik riwayat pengumpulan, serta pembaruan level secara real time. Saya membuka diskusi mengenai stack teknis; Node-RED, Python, at...
...dashboard versi pertama adalah menampilkan riwayat pengumpulan sampah agar pihak kebersihan dapat mengevaluasi pola angkut dan menyesuaikannya dengan cepat. Lingkup kerja yang saya butuhkan: • Rancang dan integrasikan rangkaian sensor ultrasonik (atau teknologi setara) untuk membaca tinggi sampah. • Kembangkan firmware agar sensor dapat mengirimkan data secara stabil—idealnya menggunakan MQTT atau protokol ringan serupa. • Buat backend dengan database terstruktur untuk menampung log riwayat pengumpulan dan endpoint REST/GraphQL sederhana. • Bangun dashboard web responsif yang memetakan lokasi tong, menampilkan grafik riwayat pengumpulan, serta pembaruan level secara real time. Saya membuka diskusi mengenai stack teknis; Node-RED, Python, at...
...MINI PC via Rasberry Pi - Implement additional sensor card logic for “miss detection.” - Ensure hardware and firmware can adapt dynamically to layout or software changes. 4. Cloud Communication and Remote Control - Enable network communication on MINI PC for remote access and control. - Implement OTA (Over-the-Air) software upgrades and remote monitoring. - Secure cloud connectivity using MQTT and HTTPS protocols. - Provide software architecture documentation for secure cloud integration. 3. Deliverables 1. PCB design package: schematics, Gerber files, BOM. 2. Assembled PCB prototype. 3. Configured MINI PC with game emulation software and integrated sensors. 4. Fully functional 14-hole sensor table prototype. 5. Integrated servo motors and “miss detection&rdqu...
...theme without touching source. Reporting is a big piece. Manual CSV/PDF exports are fine, but the system also has to fire off daily, weekly, and monthly summaries automatically. Those reports, along with alert notifications, must reach users by both e-mail and SMS. Because the platform will eventually speak to other in-house systems, please keep ThingsBoard’s API layer and common IoT protocols (MQTT, HTTP, CoAP, Modbus, OPC-UA, etc.) ready for straightforward integration. Deliverables • A working ThingsBoard CE instance on our Windows. • Role-based access control for Super admin / Admin / Local user. • Theming panel visible only to Super admin. • Automated and manual report generation (daily, weekly, monthly) with e-mail & SMS notifications....
Setup of High-Performance GPS Tracking Backend (VPS + MQTT) Objective: Configure a VPS to act as a dedicated GPS tracking engine. It must ingest data via EMQX (MQTT), process it using Traccar (for drift filtering and mileage), and expose a secure API for the main website (hosted on ) to consume. Architecture Overview Ingestion: Trackers publish to EMQX (MQTT Broker). Middleware: A custom Bridge Script (Node.js/Python) subscribes to EMQX and forwards data to Traccar. Processing: Traccar (running "headless") handles protocol decoding, geofencing, and mileage calculation (filtering GPS drift). Storage: PostgreSQL stores the high-frequency GPS history locally on the VPS. Integration: Your Website () calls the Traccar API (via Nginx Reverse Proxy) to fetch ve...
...core team specializing in full-cycle IoT and embedded product help startups, researchers, and companies turn ideas into fully working, production-ready IoT products, from PCB and firmware to cloud, AI, and mobile Core Expertise Covers the Entire IoT Chain-> Embedded Firmware DevelopmentSTM32, ESP32, Arduino, nRF, PIC, Raspberry PiBare-metal & RTOS (FreeRTOS)BLE, Wi-Fi, LoRa, MQTT, CAN, SPI, I²C, UARTSensor integration, power optimization, OTA updates-> PCB Design & Hardware EngineeringSchematic + PCB design (EasyEDA, Altium, KiCad)Single-layer to multilayer boardsBOM optimization & DFM/DFA supportPrototype-ready Gerbers & manufacturing files-> Cloud, Backend & AI IntegrationAWS, Firebase, custom backend APIsIoT dashboards & device managemen...
...to the existing dashboard and backend Write and maintain APIs for new features and integrations Optimize performance, logging, and error handling Work with our hardware and product team to replicate field issues Support version updates and small releases Maintain documentation for changes and deployments Required Skills Strong experience in IoT backend development API development (REST / MQTT familiarity required) Experience with databases used in IoT dashboards (SQL/NoSQL) Understanding of device communication, telemetry and data pipelines Debugging experience in production systems Ability to work independently and communicate clearly Good to Have Experience with ESP32/STM32 or similar controllers Familiarity with AWS IoT / Azure IoT / Firebase or equivalent Basi...
...loop monitors the output voltage and current. If the load increases and the voltage drops, the STM32 adjusts the PWM duty cycle in real-time to maintain a constant 230V/110V AC. 4. "Smart" Features By integrating a communication module, your project moves beyond a standard inverter: Remote Monitoring: Send real-time data (Battery level, Solar yield, Load) to a mobile app or dashboard (Blynk or MQTT). Data Logging: Save energy production stats to an SD card or cloud. Protections: Implement software-defined over-voltage, under-voltage, and short-circuit protection that sends an alert to your phone. 5. Technical Challenges to Consider Dead-Time Insertion: Crucial to prevent "shoot-through" (where both MOSFETs in a leg turn on at once, causing a short). S...
...updates, issue commands and generate audit logs. • Role-based access so help-desk staff see only what they need. Core Android agent • Silent enrolment via QR code, NFC or zero-touch. • Persistent device ownership so factory resets don’t break management. • Remote commands: wipe, lock, locate, push settings, install/uninstall apps. • Real-time telemetry streamed via secure WebSocket or MQTT. Security & network • All traffic between agent and server must be TLS 1.3. • Code should be signed; tamper attempts reported instantly. • Comply with Google Play Protect policies. Deliverables 1. Source code for server, Android agent and web UI. 2. Deployment scripts (Docker or Kubernetes). 3. Technical documentation an...
...operating system (Ubuntu LTS preferred) - Install and configure Docker and Docker Compose - Apply basic security hardening (SSH key access only, firewall rules, TLS for web access) - Ensure the setup is provider-agnostic and portable to other cloud providers or a local Linux server Data ingestion from The Things Network (TTN) - Configure a reliable data flow from TTN using MQTT (preferred) or TTN Webhooks - Deploy and configure an MQTT consumer (e.g. Telegraf) on the VPS - Secure and maintainable configuration (credentials, certificates, separation of concerns) - Clear separation between ingestion, storage, and visualization components Time-series data storage - Deploy and configure InfluxDB (self-hosted) as the time-series database - Design a clean measurement and tag s...
...local server / LAN usage Professional industrial look Web and WPF only consume APIs. They must not access database directly. 3. Scope of Work (Very Clear) Included (Your Scope) UI / UX design Dashboard screens Charts & graphs Tables & filters Login screens (UI only) API integration (GET requests only) Clean, professional industrial theme NOT Included Hardware communication Modbus / MQTT / protocols Database design or queries Data calculations (kWh, PF, TOD, etc.) Alarm logic or business rules All values shown in UI are already computed by backend. 4. Data Flow (For Understanding Only) Hardware → Server → Database → API → Your UI (Web / WPF) API response time: 1–5 seconds Real-time animation not required Refresh based dashbo...
...scikit-learn, or another lightweight embedded framework, provided training remains reproducible and inference can run on a modest ARM-based gateway. I will supply device firmware specs, traffic logs, and a full test sandbox once we get started. Deliverables • Trained model with documented architecture • Inference script or compiled module ready to embed on the IoT gateway (≤ 256 MB RAM) • REST or MQTT interface compatible with the Android app • Setup guide covering data prep, training pipeline, and deployment steps • Brief report on detection accuracy and false-positive rate Acceptance criteria The model must detect at least 95 % of hostile packets in our sample set while keeping false positives below 3 %, and it must load and run on the ...
...core team specializing in full-cycle IoT and embedded product help startups, researchers, and companies turn ideas into fully working, production-ready IoT products, from PCB and firmware to cloud, AI, and mobile Core Expertise Covers the Entire IoT Chain-> Embedded Firmware DevelopmentSTM32, ESP32, Arduino, nRF, PIC, Raspberry PiBare-metal & RTOS (FreeRTOS)BLE, Wi-Fi, LoRa, MQTT, CAN, SPI, I²C, UARTSensor integration, power optimization, OTA updates-> PCB Design & Hardware EngineeringSchematic + PCB design (EasyEDA, Altium, KiCad)Single-layer to multilayer boardsBOM optimization & DFM/DFA supportPrototype-ready Gerbers & manufacturing files-> Cloud, Backend & AI IntegrationAWS, Firebase, custom backend APIsIoT dashboards & device managemen...
...Your tasks cover the complete path from schematic capture through firmware and field testing. On the hardware side that means selecting components, drawing the schematic, laying out a compact PCB, and producing a clean BOM ready for ordering. Firmware must run on the ESP32 (Arduino or ESP-IDF is fine) and handle sensor polling, secure storage of readings, time-stamped uploads to a REST endpoint or MQTT broker, and a simple web-served status page so I can verify operation without a separate app. Because the device focuses on data collection and reporting, there is no remote-control logic required. Robust error handling, Wi-Fi reconnection, and OTA update support are essential so I can maintain units in the field without physical access. Deliverables • Complete KiCad (or s...
