MQTT projects — HireLancer archive

ID / Date Listing

Automatisation du système d'alerte du bâtiment

Le bâtiment est déjà équipé de ses propres points de déclenchement via une centrale ; je souhaite maintenant automatiser toute la partie alerte. Concrètement, i...

HL-39922283

Kotlin Android Consultation Needed

I’m putting together an Android project in Kotlin and need a seasoned developer to jump in for a short-term consultation. The goal is to validate my approach, c...

HL-39920018

Voice-Command API and Automation Engineer

Voice-Only AI Integrations Engineer (APIs & Automation) What they do (plain): Turn voice requests into real actions: control a device, send an email, add a cale...

HL-39918685

SMALL ESP32 Firmware for AWS IoT Data Logging

Project: ESP32 (ESP-IDF) Firmware for AWS IoT Data Logging Description We are looking for a developer to implement firmware for an ESP32-S3 (16 MB flash) device...

HL-39916194

ESP32 MQTT Sensor Data Dashboard

I have a vibration sensor that must stream live readings through an ESP32, publish them to an MQTT broker, and finally display everything on a web-based dashboa...

HL-39914617

ESP32 Tachometer with MQTT -- 2

I'm looking for a tachometer to measure rotational speed from a motor's rotor using an ESP32 and TCRT5000 IR sensor. The speed data should be transmitted over M...

HL-39914031

Kotlin Mobile App with Hive & MQTT Integration

I need a Kotlin-based Android application that connects to an IoT device over MQTT, stores the incoming sensor readings locally with Hive, and presents both the...

HL-39911526

Wearable Firmware Intern Support

I need a project-based intern who can jump into our embedded codebase and help keep our medical monitoring devices moving forward. You will focus on: • Developi...

HL-39910206

Android Book Reader App Builder

*Android Book Reading App Development Project* *Project Overview:* We are seeking an experienced Android developer to design and develop a book reading applicat...

HL-39907300

IoT Sensor Management Cloud Setup

The goal is to create a lightweight IoT cloud layer dedicated to device management for a fleet of temperature sensors. My priority is not data analytics or visu...

HL-39905651

I need IOT development based software

I’m building a flexible software layer that can interface with a variety of connected devices and turn raw sensor data into actionable insight. The scope covers...

HL-39898109

WebSocket Upgrade for Delivery Tracking

I have three separate apps for my food-delivery service—a customer app, a shop app, and a delivery-boy app. All of them rely on a PHP back end hosted on GoDaddy...

HL-39898034

Health-Tech Kiosk IoT Prototype

IoT/Integration Developer Project Brief I am building Medrovia, a health-tech startup developing a prototype kiosk for real-time health screening. For Phase-1,...

HL-39896969

Remote Radiation & Weather Station

I need a compact, self-powered field station that can continuously measure both gamma radiation and key weather metrics, then push the readings to a central con...

HL-39888093

Migration of AlertBuddies from .NET MAUI to Native Android & iOS with Enhanced Map & Location Features

We are looking for an experienced mobile app developer/team to migrate our existing AlertBuddies application from .NET MAUI to fully native Android and iOS impl...

HL-39884944

MQTT Broker & control board Firmware

we have website and system online to control different cabinet vending machine from different brands which works by open and close electronic locks we need to a...

HL-39872695

Kıdemli Flutter Geliştirici

Pozisyon Hakkında: IoT, ödeme ve telemetri sistemleriyle entegre çalışan yüksek performanslı mobil uygulamalar geliştirmek üzere deneyimli bir Flutter geliştiri...

HL-39871407

Integrate LoRa GPS with Traccar

I have Traccar gps website, i would like to do integration for real-time tracking of LoRa/LoRaWAN GPS trackers. The platform should be view my lorawan gps track...

HL-39867636

Hệ thống giám sát phòng cấy mô cây trồng

Tôi đang tìm người cùng xây dựng một phần mềm ứng dụng SCADA điều khiển và giám sát cho phòng cấy mô cây trồng tại nhà. Phần cứng đã có sẵn: • Cảm biến nhiệt độ...

HL-39866853

Desenvolvedor IoT para Concluir Skill Alexa

Procuro um desenvolvedor experiente em automação e integrações IoT para concluir uma Skill Alexa Smart Home personalizada, já em estágio avançado de desenvolvim...

HL-39865649

Mobile Quiz App with Raspberry Pi Integration

I need a complete, production-ready solution that lets employees at 1000 different locations take a simple true/false quiz on their phones and instantly see how...

HL-39861404

ESP32 Sensor Anomaly Detection

I need an anomaly-detection pipeline for continuous temperature-and-humidity readings. The raw values come from a sensor package wired to an Adafruit Feather ES...

HL-39855837

Firebase Push Updates to Arduino UNO

I have an Arduino Uno connected to a SIM800L GPRS module and a Realtime Database on Firebase. What I need is straight-forward: whenever a sensor reading changes...

HL-39852545

ESP32 Dual-Power Smart Switch

I need a compact ESP32-based controller that will sit between my main grid supply and a solar array, sense which source is available, and automatically transfer...

HL-39849806

Multi-Tenant Cloud SCADA Platform

I need a fully cloud-hosted SCADA platform that my customers can reach from any modern web browser and a companion mobile app (iOS and Android). The system must...

HL-39843110

ESP32-CAM People Recognition System

I’m building a smart-camera solution that runs entirely on an ESP32-CAM. The unit must detect people in real time and, whenever a face is present, perform face...

HL-39841260

LiFePO4 Battery & BMS Design - 01/10/2025 20:33 EDT

I’m building a compact LiFePO4 pack to drive a new line of portable electronics and need a complete electrical and firmware design that rolls reliable power del...

HL-39841152

ESP32 Smart automatic changeover swtich

I want a clean, well-commented firmware project for an ESP32 that will drive two core functions in my home-automation setup: it must switch my lighting circuits...

HL-39840541

iot and pcb design

About the Role We’re building smart hardware products and are looking for someone who enjoys working at the intersection of electronics and coding. The role wil...

HL-39833613

MQTT Broker-based Hardware Manager App (Android)

We need an Android app (Kotlin) to manage up to 20 MQTT-enabled hardware devices using HiveMQ Cloud or AWS IoT Core as the broker. Key Requirements: Connect to...

HL-39832978

AI-Enhanced Solar IoT Web App

I have a solar-powered smart product that already reports data through a 4G/5G SIM connection. All device protocols, endpoints, and sample payloads are ready on...

HL-39822850

IoT Monitoring Web App Development -- 2

I’m ready to wrap a full-stack web application around my monitoring-and-tracking IoT device. The goal is straightforward: a standard user logs in, sees live rea...

HL-39820813

IoT Water Level Monitor Build

I’m putting together a compact, battery-powered water-level monitoring unit that relies on a pressure transducer and pushes all readings straight to the cloud—n...

HL-39809049

STM32L Smart Card Security System

I’m building a compact security-access module around the STM32L series and need the firmware that makes it all work. The microcontroller must drive an ISO 7816...

HL-39804753

IoT Specialist: Hardware, Firmware & Cloud Integration

IoT Engineer – Embedded Systems & Cloud Integrations I’m an IoT Engineer specializing in end-to-end connected product development — from PCB-ready hardware desi...

HL-39803518

Gas Monitor Web App Build - 18/09/2025 17:25 EDT

I need a production-ready web application that lets each of my gas-monitoring sites log in, send JSON payloads over Mosquitto MQTT, and store that data in a SQL...

HL-39803478

Full Stack Raspberry Pi Smart Locker Developer

Smart Locker Backend Developer Project Overview We are building a smart locker system for large-scale deployment in Riyadh, integrating dual cameras (QR scannin...

HL-39797659

nRF52832 RS-485 Firmware Development

Embedded Firmware PoC — nRF52832 + RS-485/Modbus + LoRaWAN (SX1262) + Cellular MQTT (SIM7600) Platform MCU: Nordic nRF52832 (Cortex-M4), Zephyr RTOS. Radios: SX...

HL-39797223

Fix ESP32 MQTT Memory Leak

I'm looking for expert on memory leaks with MQTT on an ESP32 to refactor the code to prevent memory allocation errors. Freelancer must have platformIO, an ESP32...

HL-39785675

Tech Lead with IoT expertise needed for Virtual Power Plant Development

Summary We are seeking an experienced and passionate Tech Lead / Full-Stack Developer to join the ongoing development of our innovative Virtual Power Plant (VPP...