MQTT Jobs

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) • Heartbeat/stat...

I’m building a smart irrigation setup that links a Raspberry Pi edge server with several ESP32 nodes in the field. Each ESP32 gathers data from soil-moisture probes, compact weather boards (temperature, humidity, barometric pressure), and inline flow meters, then reports everything wirelessly to the Pi for processing. Here’s what I need from you: • Python (Raspberry Pi) and MicroPython/C++ (ESP32) code that ingests the raw sensor streams, pushes them through an on-device model, and decides—within seconds—whether to start or stop the main pump and which solenoid valves to open. • An ML pipeline: training notebooks, a lightweight model (TensorFlow Lite or similar) and the inference wrapper that runs locally. The model must act on current soil-moisture rea...

Project Brief: Industrial 230V ESP32-C3 Toshiba AC Gateway & I/O Controller 1. Project Overview Design and develop a production-ready, CE-compliant, DIN-rail mounted (EN 60715) industrial controller for Toshiba AC systems. The device serves as a Master Gateway bridging three domains: • Toshiba AB Protocol – Galvanically isolated UART interface to AC indoor units • Modbus RTU (RS-485) – Expansion bus for modular field I/O (relays, temperature, analog modules) • Local Analog I/O – 0–10 V interfaces for direct HVAC integration The system must be stable, thermally suitable for sealed enclosures, and follow Screaming Architecture principles for long-term maintainability. 2. Hardware Specifications Power & Safety • Integrated ...

I want the running total revenue from my Shopify store to show on a Wi-Fi-enabled physical counter that sits on my desk. The job is to build the small bridge between 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:...

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’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 that shows live ...

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 “t...