Mqtt jobs
...Queclink, or generic trackers using TCP/UDP protocols). 5. App Store Deployment: Handling the entire process of publishing the apps on the Apple App Store and Google Play Store. Required Technical Skills & Expertise: · Backend Development: · Proficiency in Node.js (JavaScript/TypeScript), Python (Django/FastAPI), or PHP (Laravel). · Strong experience with real-time data communication (WebSockets, MQTT, or raw TCP/UDP socket programming). · Database management (PostgreSQL with PostGIS for geospatial data, MySQL, or MongoDB). Experience with time-series databases (like InfluxDB) is a plus. · Frontend Development (Web Panel): · Experience with modern frameworks like React.js or Vue.js. · Must-have: Integration of mappi...
I’m building a responsive web dashboard that streams live readings from multiple IoT devices and I want the experience to feel fast, clean, and intuitive on any screen size. Data will arrive through either a REST API or an MQTT broker; whichever you are more comfortable wiring up, as long as the update cycle stays in the “every-few-seconds” range. For charting, I’ve settled on , so the components you create should leverage its real-time capabilities for line, bar, and gauge style visualisations. Think temperature, humidity, power usage, plus a small area for overall system status and alert banners. When a reading passes a predefined limit the UI should surface a notification immediately. Security is essential. A straightforward login with an Admin role is e...
...equipment in the sense of keeping an eye on its live performance data from anywhere. The machinery is already fitted with basic IoT-ready sensors; what is missing is the cloud-to-device bridge and a clean user interface where I can watch throughput, temperature, and fault codes in real time. Here is the flow I have in mind: • Edge device pushes sensor readings via cellular data to a secure backend (MQTT or HTTPS—use what you are most comfortable with). • Backend stores, normalises, and exposes that data through an API. • A web or mobile dashboard pulls the feed and displays key performance metrics with alerts when values drift outside preset thresholds. That monitoring dashboard is the first milestone and the only compulsory feature right now. Being ab...
...model that can detect and recognise multiple faces in the same frame, then immediately tag each recognised person with a timestamp. All inference happens locally; only the processed results travel to the cloud, never the raw video. Model size, frame rate and power draw have to suit a typical Pi 4 with a standard camera module. Connectivity & data flow The Pi should expose a small, secure REST or MQTT service that pushes attendance events to the cloud and retries automatically if connectivity drops. A simple enrolment script should let me add new faces directly on the Pi or via an API call. Cloud side The frontend will live on my preferred cloud stack (a basic React or Vue single-page app is fine) and must focus on a clean Attendance Records view: searchable, filterable ...
Project Overview This project aims to develop a small WiFi gateway that connects to a Danfoss EKC 202C refrigeration controller via Modbus RTU (RS-485) and provides a local web interface. The system should allow monitoring of key controller values and limited control via a browser. The first version is a local...internet access • Multi-device dashboard • User accounts • OTA firmware updates Deliverables • Working firmware • Source code • Wiring diagram • Setup instructions • Documentation of Modbus register mapping used Expected Timeline Estimated development time: 1–2 weeks. Future Expansion The architecture should allow future cloud integration where the gateway can send data to a remote server (e.g., MQTT or HTTPS API) for remote ...
...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-volatile memory will run the firmware, manage data logging, generate a unique HWID at manufacture, and expose a Modbus-compatible register map to the HMI as well as secure MQTT to the cloud. Built-in self-diagnostics, battery-backed RTC, emergency-stop circuitry and multilayer protection (voltage, temperature, pressure) are mandatory to meet GMP, FDA and ISO expectations for validated environments. Deliverables I will review • Schematic, PCB layout and stack-up (Altium or KiCad) • Complete, production-ready BOM with lifecycle status • ...
...should use reliable waterproof connectors suitable for field deployment. Firmware Requirements The STM32 firmware should include: • Sensor drivers and data acquisition logic • Sensor calibration routines • Server authorization logic for sensor activation • MOSFET-based hardware power control for sensors • LTE communication using AT commands • Data transmission to the cloud server using MQTT or HTTP • RS-485 communication support (Modbus RTU) • Pump / valve control logic • Watchdog timer and firmware safety mechanisms Power Efficiency Requirement To improve power efficiency for field deployment, the LTE module should not remain continuously active. The system should support scheduled data transmission, where the device wa...
...should use reliable waterproof connectors suitable for field deployment. Firmware Requirements The STM32 firmware should include: • Sensor drivers and data acquisition logic • Sensor calibration routines • Server authorization logic for sensor activation • MOSFET-based hardware power control for sensors • LTE communication using AT commands • Data transmission to the cloud server using MQTT or HTTP • RS-485 communication support (Modbus RTU) • Pump / valve control logic • Watchdog timer and firmware safety mechanisms Power Efficiency Requirement To improve power efficiency for field deployment, the LTE module should not remain continuously active. The system should support scheduled data transmission, where the device wa...
...tracking system • Implement real-time bus location ingestion • Develop digital ticketing and fare management system • Integrate payment gateway • Implement data analytics and reporting • Design scalable database architecture • Support high telemetry data ingestion (~2.5M GPS records/day) Technology Stack Preferred experience with: • Node.js (NestJS) or Java Spring Boot • PostgreSQL • Redis • Kafka or MQTT • REST APIs • WebSockets • Cloud deployment (AWS / Azure / DigitalOcean) Nice to Have • Experience with transport systems • Experience with IoT or GPS telemetry • Payment gateway integration • High-scale backend systems Project Duration 3–5 months Please include • Relevant backen...
...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 criteria On power-up the ESP32 must auto-detect every listed sensor—whether it’s attached by wire or discovered over BLE/Wi-Fi—then begin streaming motion, proximity, light, and sound data at an adjustable interval. I can verify the stream in an MQTT client and see clean values in the serial monitor without compilation warnings or watchdog ...
...finishing three tightly-connected pieces: • A Python script on a Raspberry Pi that collects sensor readings and publishes them to an MQTT broker. • A Django micro-service that preprocesses those messages before handing them to a Laravel / MySQL backend, where devices and users are registered and authenticated. • A React Native mobile app that runs on both iOS and Android and subscribes to the same broker for real-time data display. The mobile front-end’s first milestone is a clean dashboard that streams temperature, humidity, device operational status and any other sensor readings the Pi sends. Data has to update instantly without manual refresh, using MQTT over websockets. Once that foundation is stable I will add control commands, so pleas...
...deliverables 1. FastAPI service exposing REST endpoints and a WebSocket channel, cleanly documented with OpenAPI. 2. React dashboard featuring device list, detail view, real-time widgets, and a history panel. 3. Secure auth (JWT or OAuth2) plus basic role management. 4. Docker-compose file for effortless local deployment. 5. Read-me and API specs good enough for our internal team to maintain. 6. MQTT broker and mTLS certificates management Acceptance criteria • Device data appears in the UI with <1 s latency under lab conditions. • Historical queries return accurate results for at least the past 30 days. • Command requests reach the target device and UI reflects state change within two refresh cycles. • All endpoints covered by unit tests...
...Continuous system-health monitoring so I can see device status, connectivity, and battery levels at a glance • Complete alarm-system arm, disarm, and event handling from the same dashboard The solution must run on a Windows server yet present everything through a clean, secure web interface that any modern browser can open—no thick desktop client. Please rely on Tuya’s official API/SDK (MQTT, HTTPS, WebRTC, etc.) so future firmware updates remain compatible. Deliverables: 1. Source code with build instructions 2. Installer or Docker image for Windows deployment 3. Database schema (if used) and setup script 4. Admin guide and user manual 5. Short video or live demo proving real-time alerts, video feed switching, and health-check reporting...
...humidity, CO₂, and particulate-matter probes positioned around a city block–level testbed. That raw feed must be captured, cleaned, time-synced, and formatted for rapid hand-off to the variational quantum model. Key deliverables • Architecture diagram of the edge-to-cloud sensor network, including communication protocols and security touchpoints • Python-based acquisition and preprocessing code (MQTT/LoRaWAN ingestion through to a Pandas-ready dataset) • Variational quantum circuit(s) implemented in both Qiskit and PennyLane, wrapped so classical pre- and post-processing can call them interchangeably • Hybrid loop tying classical optimizers to the quantum backend, plus fall-back simulation for when real hardware is unavailable • Perform...
...mapping, optimisation of cooling interventions, maybe even near-real-time scheduling of adaptive shading or misting systems. Qiskit, Cirq or similar frameworks are fine as long as we can run on today’s cloud-accessible quantum back-ends and shift to simulators when hardware queues are long. • All components must communicate seamlessly: low-power IoT devices, an edge gateway, a secure message broker (MQTT or similar) and a cloud layer where the quantum jobs are orchestrated. Deliverables 1. Architecture diagram and technical narrative explaining sensor network, edge layer and quantum workflow. 2. Firmware or lightweight container image for the sensor nodes that streams the four required metrics. 3. Cloud or hybrid stack that ingests the data, dispatches quantum...
I need a...quickly and allows orbit, pan and zoom. • Subscribes to the sensor endpoints (MQTT, WebSocket or REST—whichever you prefer) and updates readings with minimal latency. • Calculates and displays a live “health score” that blends current stress/strain data with short-term predictions. • Provides basic charts or panels for historical trends without leaving the page. • Ships with clear setup scripts, source code and a short read-me so I can deploy it on my own server. I’m open to your preferred stack for the back end—Node.js, Python or Go are fine—as long as the front end remains pure and works on Chrome, Edge and Firefox. If you have prior experience fusing LiDAR meshes with or implementing MQTT/REST br...
...verification must be fast enough to avoid boarding queues, the counting accuracy should stay above 98 %, and the data flow has to be truly real-time, not batch. If you already work with edge cameras or depth-sensing devices for people counting, please tell me how you will integrate them with your face-recognition engine and how you plan to push the feed straight to our internal server (REST API, MQTT, or any protocol you prefer, as long as latency is minimal). Deliverables I expect: • Hardware specification for sensors/cameras and any onboard compute you recommend • Software package that performs face recognition, maintains a running headcount, and streams JSON records to our server • Simple dashboard or log viewer so my security team can review boardings ...
...scenes. Core features I want working from day one: • Remote control via app – low-latency commands to each device, with acknowledgements coming back to the UI. • Automated routines – time- or sensor-driven rules that run even when the user’s phone is offline. • Real-time monitoring – live status dashboards plus historical logging for later analytics. You’re free to choose the stack, but MQTT, WebSockets, RESTful APIs and a modern backend language (Node.js, Python or similar) make sense here. The code must be well-structured, container-ready and include straightforward deployment instructions so I can spin up new environments quickly. Security, authentication and OTA update hooks are all part of the brief. Hand-over package: fu...
...Heartbeat/status reporting Secure TLS communication Remote configuration OTA firmware updates Firmware Requirements Modular and scalable architecture FreeRTOS (preferred) OTA firmware update capability Secure bootloader Remote configuration of: Reporting intervals Sensor thresholds Alert settings Well-documented source code Git repository delivery Designed for future feature expansion Communication Protocols MQTT over TLS HTTPS REST API JSON-based payload Cloud-ready (AWS IoT / Azure IoT compatible) Hardware Design Expectations Low BOM cost Production-ready PCB design Modular sensor expansion capability Compact industrial enclosure Designed for manufacturability (DFM) Option for external antenna Deliverables Complete schematic & PCB files Optimized BOM with cost breakdown...
...like weather & sensor data. We hope to build a portal for our clients to log in and view their data and see notes from PL reviewers. Sensor Information In each building we will be installing multiple sensors from Pressac, primarily CT clamps and the Solar Air Quality 3-in-1. These sensors will wirelessly transmit back to Pressac’s gateway, which can be programmed to send data in json files via MQTT to up to 5 brokers. The gateway supports AWS IoT Core, Microsoft Azure IoT Hub, Google Sheets, and Node-Red. Portal Requirements It would be nice to have an adjustable graph with a toggle for each of the sensors and an adjustable time frame to view. As our clients may manage multiple addresses the portal will need a way for them to switch between them. We would like to have...
...via USB-C or pogo pins, targeting ultra-low sleep currents (single-digit microamps where feasible) while tolerating NB-IoT transmit bursts with peak current that can reach hundreds of milliamps. The system shall provide the necessary interfaces for sensors and debugging (UART, I2C, optional SPI, GPIO, ADC for battery measurement) and firmware must support NB-IoT attach, secure data transport over MQTT/HTTPS using TLS, low-power features such as PSM/eDRX, and firmware-over-the-air updates, leveraging hardware security features (secure boot, secure key storage, and root-of-trust capabilities). Mechanically, the PCB should be compact (targeting under ~40 × 30 mm where possible), suitable for wrist-wearable enclosures, and designed toward future compliance goals such as CE/FCC ...
...What I have: • High-level hardware spec (Wi-Fi + BLE MCU, digital temperature sensor, relay/triac for HVAC control) • Basic UX flow for the companion apps What I need from you: 1. Refine the hardware BOM and confirm pinouts to keep the PCB single-layer where possible. 2. Write efficient, update-safe firmware (C/C++ or MicroPython are fine) that publishes sensor data and receives commands via MQTT or a comparable lightweight protocol. OTA updates are mandatory. 3. Deliver simple reference apps or React Native modules for iOS and Android that discover the device on the local network, display live temperature, and allow target-temperature adjustments. 4. Provide clear build/flash instructions and API documentation so my in-house mobile team can extend the UI. N...
...mobile app network API • Building a middleware backend service • Integration with: • Google Home • Home Assistant • MQTT / Node-RED • Custom REST API bridge • Hardware fallback option: • Smart relay / smart plug (only if software control is impossible) ⸻ Deliverables • Technical feasibility analysis • Proposed architecture • Working prototype • Deployment-ready solution • Documentation for: • Setup • Maintenance • Future scalability ⸻ Required Skills • IoT system integration • Reverse engineering mobile APIs • Network protocol analysis (Wireshark, MITM tools) • Embedded systems communication • Smart Home ecosystems (Google Home, Home Assistant, MQTT...
...time, trigger autonomous adjustments, predict equipment failures before they happen, and continually fine-tune operating set-points so we hit tighter yields with less energy and waste. Data comes from existing PLCs, SCADA historians, PAT probes, and IoT sensors already on the plant network; the solution should layer on top without forcing us to rip and replace. Python, TensorFlow/PyTorch, OPC UA, MQTT, and a modern time-series database are the likely tool-chain, but I’m open to alternatives if they mesh with GMP requirements. Deliverables • Architecture and data-flow design • AI agents for monitoring & control, predictive maintenance, and process optimisation, each deployable in Docker or Kubernetes • Integration scripts/connectors for PLC/SCADA da...
...أريده من هذا الموديول الأوّلي هو التالي: • يجعل الحساسات تعمل بتناغم، يجمع البيانات الخام ويحلّلها لحظيًا على مستوى الـ MCU. • يُدير وحدات الاتصال GPS و 4G ويضمن استقرار الربط. • يُطلق تنبيهات فورية عند استيفاء شروط محددة. • يوفر طبقة مراقبة تسمح بتتبع الأداء والـ logs عن بُعد. أتوقع منك بناء كود نظيف بلغة C/C++ (أو Rust إن كنت تفضّل)، مع بنية قابلة للتحديث OTA، واستخدام بروتوكول خفيف مثل MQTT أو HTTPS لرفع البيانات إلى السحابة. بعد الانتهاء أحتاج: ملف firmware جاهز للتحميل، توثيق إعدادات العتاد، مخطط البنية السحابية، ودليل اختبار سريع. التفاصيل الحساسة — شريحة المعالج، خوارزميات التحليل، عناوين الـ API — سأشاركها فور توقيع NDA. الهدف هو إثبات الفكرة في أسرع وقت ثم الانتقال إلى مرحلة الكاميرا والرؤية الحاسوبية لاحقًا. السرية التامة وا...
...is tapped, the light should toggle immediately, and that new state must stay perfectly in-sync with what the Shelly app and Home Assistant report. Likewise, any change triggered from either app must update the physical relay state without noticeable delay. I would like the code written in Shelly’s built-in JavaScript environment, making full use of the device’s local APIs (WebSocket, REST or MQTT—whichever is most robust) so everything runs locally even if the cloud is unavailable. I’m also preparing to migrate my setup to Matter, so please structure the logic in a way that will be easy to expose through a Matter bridge later. Deliverables • Well-commented Shelly script file(s) ready to paste into the web interface • Brief README explai...
...are dealing with pulse signals, so reliable debouncing and timing accuracy are essential. For the analogue temperature channels I expect you to select an ADC with the resolution and isolation needed for noisy factory floors, add any necessary cold-junction compensation, and keep calibration straightforward. The data must leave the edge device encrypted (TLS) and land in a cloud message broker (MQTT, HTTPS or similar) ready for ingestion by platforms such as AWS IoT, Azure IoT, or InfluxDB. Please expose configuration through a lightweight dashboard—Node-RED, Flask, or whatever you deem quickest to maintain—so I can adjust sampling rates, thresholds, and network credentials without rewriting code. Deliverables • Schematic and BOM for the interface board(s) &...
...for an engineer or a small team to deliver a working prototype of the electronics for a automated shutter project. The system runs on 24V DC and drives two brushed DC motors (each actuator delivers roughly 50 Nm at the output shaft through mechanical gearing). The electronics will sit inside the actuator housing, and I want Wi-Fi connectivity with Home Assistant integration (preferably ESPHome, MQTT is also fine). My preference is one ESP32 controlling both motors, with encoders (A/B) on each output shaft. I will not use limit switches, so the design should include reliable end-position handling without them: travel learning/calibration, position tracking via encoders, and safe stopping based on current sensing and/or “PWM commanded but encoder not moving” logic (ja...
I need an embedded engineer to help safely connect a PCB to a lead-acid battery pack in series and integrate 4 external sensors (temperature, humidity, water presence, etc.). The system must read data in Arduino IDE and, if possible, send it to an existing telemetry endpoint (HTTP/MQTT). Scope: Safe wiring from battery pack to PCB Best way to connect and mount sensors Connector and grounding recommendations Simple Arduino example to read sensors and output/send data Experience with ESP32, Arduino, sensors, and battery-powered systems required.
...are fine as long as configuration remains readable and easy to back up. • Firewall rules (UFW or iptables) expose only the essentials: 8883 for MQTT, 443 for Mender/HTTPS, and 22 for SSH. • I want clean deployment scripts or a single so I can rebuild the environment in minutes. Acceptance checks 1. A shell script or compose stack that fully provisions Mosquitto and Mender on a clean Ubuntu image. 2. Successful TLS publish/subscribe test using provided client certificates. 3. Firmware upload and deployment from Mender’s UI to a test device, rejected when the artifact is unsigned. 4. Three consecutive failed SSH or MQTT logins trigger a ban, confirmed with fail2ban-client status. 5. A concise README covering rebuild steps, backup locations, an...
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....
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....
...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...
