Firmware para Maestro-Esclavos LoRaWAN y Node-Red

@hayteekeys

KINDLY READ THROUGH MY PROPOSAL ENTREGO TODO FUNCIONANDO 100 % EN 8 DÍAS PARTE 1 – FIRMWARE ESCLAVOS (Heltec CubeCell AB02S – Arduino) - LoRaWAN Class A + modo propietario bidireccional (para comandos rápidos del maestro) - RS485 (Modbus RTU) → 2-4 caudalímetros simultáneos - 2 entradas rápidas por interrupción (pulsos alta velocidad) - 2 salidas para electroválvulas (MOSFET + flyback) - Sensor temperatura interno + batería (INA3221 o ADC directo) - Deep-sleep ultra-bajo consumo (< 5 µA) + wake por timer o interrupción - Gestión completa de batería + alertas por temperatura - OTA por LoRa (comandos desde maestro) - Configuración remota total: tiempos sleep, umbrales, caudalímetro K-factor, etc. - Código 100 % comentado + librerías incluidas PARTE 2 – MAESTRO (Raspberry Pi + Node-RED) - Nodo LoRa completo (Dragino LoRa HAT o RAK2287 USB) - Node-RED flow con: - Recepción y decodificación automática de tramas esclavas - Envío de comandos (leer caudal, abrir/cerrar válvula, cambiar config) - Dashboard web con mapa de nodos + estado real-time - Alertas por email/Telegram si temperatura fuera rango o batería baja - Base de datos SQLite + Grafana opcional ENTREGABLES - Firmware esclavo Arduino completo (.ino + librerías) - Flow Node-RED exportado + script instalación LoRa - Vídeo de 3 minutos funcionando (2 esclavos + maestro) - Documentación PDF 100 % en español (pinout, protocolo LoRa, comandos)

@AmazingEngr76386

As a seasoned code developer with over a decade of experience, I'm no stranger to the unique challenges and intricacies of firmware development as required by your project. My profile highlights my proficiency with Arduino and embedded systems - two cornerstones of building exactly what you're after: complete firmware for your LoRaWAN network using Raspberry Pi and Node-Red as the master system, and Heltec CubeCell AB02S modules as the slave nodes. With such challenging functionalities from periodic flowmeter readings to valve control and configurable parameters, you need someone who can deliver on a technical level. Moreover, I incorporate fault tolerance, error handling, and configuration management into my work, which are essential aspects for both your use case and the educational implementation aspect of the project. I believe in delivering more than just a finished product. I am committed to providing detailed documentation of libraries, pin configurations, LoRa usage instructions along with installation guides and remote assistance for two FP students just as your project scopes.

@hayat38402

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas:  Embedded C Programming.  VHDL/Verilog, Quartus/Vivado, LABView/ Multisim/PSPICE/VLSI  MATLAB/SIMULINK  Network Simulator NS2/NS3  Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32.  IDEs like Keil MDK V5, ATmel studio and MPLab XC8.  PLCs / SCADA  PCB Designing Proteus, Eagle, KiCAD and Altium  IOT Technologies like Ethernet, GSM GPRS.  HTTP Restful APIs connection for IOT Communications. Also, we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements.

@mykolalus

⭐⭐⭐⭐⭐ Senior Embedded Systems & IoT Engineer Here! ⭐⭐⭐⭐⭐ Hello! As a senior PCB & Firmware & IoT engineer, I have checked out your project details and I am confident that I can finish your project perfectly. I will deliver production-ready firmware for Heltec CubeCell AB02S (HTCC-AB02S) slave nodes and a Node-RED master on Raspberry Pi implementing robust bidirectional LoRa frames, RS-485 flow-meter sampling with interrupt-driven counts, solenoid valve control, configurable thresholds, sleep schedules, battery management, and alerting. Firmware will be modular for Arduino/PlatformIO with resilient LoRa framing (ACKs, retries, CRC), scheduled polling plus interrupt handling for fast inputs, power-aware state machines for deep sleep, secure parameter persistence, and comprehensive error/confirmation handling. The Raspberry Pi master will host Node-RED flows to compose/read message frames, manage node configuration, and log telemetry; I will provide example frame formats and message type handlers. Deliverables include organized source code for master and slaves, wiring and pin mappings, documentation of LoRa libraries and configuration, flashing and test guides, installation steps, and a short training package for two automation students. Looking forward to discussing more details. Regards, Mykola

@ail5a9f298b597ed

As you may have noticed from my comprehensive portfolio, I’m Adil, a seasoned Full Stack Developer, with a specialty in firmware development for various hardware like the Arduino and Raspberry Pi. I’m particularly adept at working with LoRaWAN devices, which aligns perfectly with the requirements of this project. My skills extend to using platforms such as IDE Arduino and Node-Red for seamless communication and control between the devices - making me an ideal candidate for designing and developing the complete firmware for your distributed LoRaWAN system. Beyond my knowledge of device registration, data management, and message handling through LoRaWAN, my grasp on board-specific libraries & configurations adds an edge to my capabilities. Leveraging significant experience in C Programming and Electronics, I assure you that I will organize “clean” source code that can be readily compiled in Arduino IDE or PlatformIO. Additionally, my thorough documentation skills guarantee easy troubleshooting and maintenance. Lastly, as an experienced freelancer, I truly respect your specified deliverables and understand the significance of accurate estimations both in terms of time and money. While a proper study is crucial before providing a definitive budget estimate but considering what is currently known to me about the project,I would be able to complete it within a reasonable timeframe and provide training materials suitable for the training

@kkirandeep582

As an experienced professional with over 8 years in Electronics and Documentation, I am confident in my ability to deliver the firmware you require for your LoRaWAN project. First and foremost, I am well-versed in the use of Arduino IDE and my knowledge extends to the Raspberry Pi platform as well as Node-Red - ensuring that I possess the comprehensive skill set necessary for this job. My expertise includes understanding and creating trames, sending commands via LoRa and managing confirmation - all key aspects you expect from the master device. For your slave devices, I have experience working with components like `Heltec CubeCell AB02S`, a plaque you specifically mentioned. I can offer comprehensive functionalities from periodic flow measurement, including conditions like `RS485` communication, ultra high-speed input or interrupts. Moreover, I can integrate actions on so that I can evaluate it precisely to give a time estimate and present you with a competitive budget plan.

@brayanstiven5

Hi . I am very excited with your project because I have completed similar project recently. The skills required for your project are my main specialty.(Arduino, Electronics, Automation, Signal Processing, Documentation, C Programming, Raspberry Pi, Firmware, Embedded Systems and Microcontroller) I can handle this perfectly and have abundent experiences. Please confirm that I am one of the best fits for you and drop me a message for further discussion. Thanks and Best Regards.

@sakshis576

As an experienced freelancer specializing in Arduino and Raspberry Pi projects, I'm confident that I have the skills and expertise to successfully deliver on your project needs. With a deep understanding of LoRaWAN, node-red, and the Heltec-Cubecell AB02S board, I can provide you with a comprehensive solution for your distributed system. My experience includes developing firmware that enables bidirectional communication over LoRa between slave nodes and a master. Additionally, my proficiency in C programming, Electronics and Embedded Systems will be invaluable in executing key functions for the slave nodes such as periodic measurement impinges utilizing RS485 along with fast interrupt capabilities, actioning solenoids, battery management, and other necessary configurational parameters. I'm also well-versed in implementing error handling within the LoRa layer, remote parameter updates as well as ensuring temperature thresholds to trigger alerts are firmly defined.

@jay8mac

This project aligns perfectly with my expertise in Firmware development, Microcontrollers, and Signal Processing. I understand your requirements for developing LoRaWAN Firmware for slaves using the Heltec CubeCell AB02S board and a Raspberry Pi master interacting bidirectionally in Node-Red. I assure you of high-quality coding compliant with Arduino IDE platform. I'll also document libraries, pin configurations, LoRa settings and provide installation guides. With [number] years of experience, I'm ready to deliver the [package details in your context]. Excited about the possibility of collaborating with you on this innovative [type of] project. Regards, Jason McLachlan

@dragomira2

As a seasoned freelancer with unmatched skills in Automation, C Programming, Documentation, Firmware and Raspberry Pi, I am confident that I am the perfect fit for your project. On your project of creating a complete firmware for LoRaWAN-based distributed system, I can deliver excellent results. My extensive knowledge of IDE Arduino, LoRa and Node-Red coupled with my experience in programming with placa heltec cubecell ab02s (htcc-ab02s) sets me apart from other contenders. What makes me unique for the requirments of this project, is my proficiency in the management and creation of data packets as required by the master-slave relationship between the nodes. With precise handling of errors and confirmation in the LoRa layer, I ensure that data transmission is accurate and reliable. Additionally, my ability to update thresholds and parameters will provide a scalable system for you to work with. Moreover, beyond just compiling organized source code in Arduino IDE or PlatformIO and delivering comprehensive documentation on libraries, pins and LoRa configurations; I also offer a short installation guide.

@redbrickamerica

Hello! With expertise in Embedded Systems and Firmware development, we are prepared to handle the complete firmware project for your LoRaWAN system. Our team will develop customized firmware for the Heltec CubeCell AB02S slave nodes to communicate bidirectionally with the Raspberry Pi master running Node-Red. The slave nodes will perform periodic flowmeter measurements using RS485, control solenoid valves, and manage internal parameters efficiently. For the master, we will create and manage data frames, enabling seamless communication with the slaves via LoRa. Our deliverables will include well-organized source code for both master and slave nodes, documentation on libraries and LoRa configuration, installation guide, error handling mechanisms, and remote implementation training for two automation students. The estimated timeline for project completion is [Insert duration here] days with a budget of [Insert budget here] EUR. We are well-versed in Arduino IDE and PlatformIO for seamless compilation. If you require additional technical details, please provide the documentation for a more precise estimate. How can we proceed with the project? Cheers, RedBrick American Engineering

@joes590

Hi As an experienced mechanical engineer with a passion for engineering innovation and a strong skill set in electronics and microcontrollers, I am confident in offering you an efficient solution for your firmware development project. I understand the complexity of your LoRaWAN distributed system and have the proficiency required to create, manage, and troubleshoot intricate communication using LoRa between the master (Raspberry Pi) and slaves (Heltec CubeCell AB02S). In addition to delivering clean, well-documented code that's easily deployable in Arudino IDE or PlatformIO, I will also provide comprehensive libraries documentation, LoRa pin configuration guide, installation guidelines, testing procedures as mentioned in your deliverables. Furthermore, my budget-conscious mindset ensures that you receive cost-effective solutions without compromising on quality. Let's discuss your technical documentation further and get started! Sincerely

@SaadMubee

Hi there, I understand you're looking for a comprehensive firmware solution for a distributed system using LoRaWAN, focusing on communication between slave nodes with the Heltec CubeCell AB02S and a master Raspberry Pi running Node-RED. Your goal is to ensure reliable bidirectional communication while managing tasks such as flow meter readings and electroválvula actions effectively. To meet your requirements, I propose developing secure and efficient firmware that not only complies with your functional specifications but also ensures robustness in communication. I'll create a well-structured codebase that allows seamless interaction between the master and slave nodes, integrating necessary features such as error handling and configuration management. My experience with IoT projects and expertise in LoRaWAN will guarantee that the system is scalable, efficient, and easy to manage. I can also provide clear documentation and a straightforward installation guide, and I'm prepared to support your students in implementing the system remotely. Could you share any specific deadlines or additional technical documentation that may help refine the proposal? https://www.freelancer.com/u/saadmubee Best regards, Saad Mubee.

@deane20

Hola, he desarrollado sistemas distribuidos LoRa/LoRaWAN con medición RS485, programación de suspensión de bajo consumo y configuración remota. Esto incluye la implementación de 42 nodos esclavos con una tasa de pérdida de paquetes inferior al 2 % y una puerta de enlace maestra Raspberry Pi + Node-RED. También integré dispositivos Heltec CubeCell en un proyecto anterior, optimizando los ciclos de activación para prolongar la duración de la batería en un 35 %. Para este proyecto, estructuraré la comunicación maestro-esclavo con un protocolo de comando/trama consistente e implementaré un sistema robusto de gestión de ACK/Retry en la capa LoRa. Mi flujo de trabajo incluye: (1) definir tramas de mensajes y direccionamiento, (2) implementar firmware esclavo con lectura RS485, captura de interrupciones, control de válvulas y lógica de suspensión, (3) construir el motor de la puerta de enlace LoRa Node-RED, (4) validar la fiabilidad de extremo a extremo y las rutinas de actualización de parámetros. Proporcionaré código limpio y compilable para Arduino IDE/PlatformIO, además de documentación y una breve guía de implementación para sus estudiantes. Para una estimación precisa, ¿podría confirmar el número de nodos esclavos previstos? ¿Los caudalímetros utilizan Modbus RTU o un protocolo RS485 personalizado? ¿Qué rangos de duración de reposo requieren? ¿Se requiere una actualización OTA? Estoy listo para comenzar de inmediato una vez que se aclaren estos puntos.

@mohamedaminea1

Dear Client, I have developed more than 35 LoRa/LoRaWAN embedded systems and over 20 RS485-based industrial sensor interfaces, including multi-node networks with bidirectional command frames and sleep-mode optimization achieving 40–60% battery savings, which aligns directly with your distributed CubeCell AB02S architecture. My approach will follow: (1) define the LoRa frame protocol for read/act/config messages, (2) develop slave firmware with RS485 flowmeter acquisition via interrupts, valve control, parameter storage, and sleep-cycle logic, (3) implement the Raspberry Pi Node-RED master with command parser, queueing, ACK/NAK handling, and error-management layer, (4) finalize documentation, flashing guides, and remote onboarding for your two FP students. The critical success factor is ensuring a fully deterministic LoRa protocol with retries, confirmations, and parameter updates, independent of radio interference. Could you confirm the exact RS485 flowmeter models and their baud rates? Do you already have the LoRa spreading factor, bandwidth, and frequency plan defined for the site? Should the slaves support OTA configuration persistence in EEPROM/Flash? What is the expected maximum number of nodes in the network? I estimate 12–15 days for full completion and will provide a fixed budget after receiving the missing technical parameters.

@deniskirilov0212

I have rich experience building distributed IoT systems, so I read your project description brief and understood what you want fully. I’ve designed firmware for LoRaWAN-based networks before, and I’ve worked extensively with Heltec CubeCell boards, RS485 sensors, and low-power sleep cycles in real-world deployments. I can deliver stable slave-node firmware that handles flow-meter readings, solenoid control, configuration parameters, and battery-safe sleep logic with clean, modular code. I’ve also built master–slave architectures using Raspberry Pi and Node-RED, so the command-frame system you require fits perfectly into my previous work. I understand that one of the biggest challenges here is ensuring reliable bidirectional LoRa messaging with confirmations and error handling, and I’m confident I can solve that using a structured frame protocol and robust retry logic. I can also prepare all documentation, wiring references, LoRa configuration notes, and an installation/testing guide that your vocational students can follow step-by-step. I will deliver fully organized source code for both master and slave devices, ready for Arduino IDE or PlatformIO, plus remote support during implementation. Best Regards Denis

@oleksandrt68

Hola, Soy ingeniero en sistemas embebidos e IoT, con experiencia en LoRa/LoRaWAN, Heltec CubeCell (htcc-ab02s), RS485 y Node-RED sobre Raspberry Pi. Puedo desarrollar el firmware de los esclavos en Arduino/PlatformIO para leer caudalímetros por RS485 y entradas rápidas, accionar electroválvulas, gestionar modos sleep, batería y alarmas de temperatura, todo con comunicación LoRa bidireccional y ACK/reintentos a nivel de trama. En el maestro (Raspberry Pi + Node-RED) implementaré la lógica para crear y gestionar tramas de lectura, actuación y configuración, mapeando cada nodo y registro a dashboards y flujos claros, con posibilidad de actualizar umbrales y parámetros en remoto. Entregaré código fuente organizado, documentación de librerías/pines/configuración LoRa, guía de instalación/flash/pruebas y ejemplos de flujos en Node-RED. También puedo apoyar la puesta en marcha remota con los 2 alumnos de FP, explicando paso a paso cómo compilar, cargar y depurar. Como estimación inicial, veo el proyecto en torno a 3 semanas de trabajo efectivo con un presupuesto cerrado aproximado de 600–800 €, ajustable tras revisar tus documentos técnicos y número exacto de nodos/funciones. Quedo atento para revisar la documentación y cerrar alcance, plazos y presupuesto final. Saludos cordiales,

@omarf148

Hola, puedo desarrollar el firmware completo para los esclavos CubeCell AB02S y el maestro en Raspberry Pi/Node-RED, incluyendo medición RS485, control de electroválvulas, modos sleep, alertas y gestión LoRa bidireccional. Entrego código organizado, documentación, guía de instalación y soporte remoto para tus alumnos. Dame la documentación técnica y te envío un precio cerrado y el tiempo exacto. Listo para empezar cuando me otorgues el proyecto.

@josephm692

Hi there, I can develop the full firmware for your CubeCell AB02S slave nodes and the master on Raspberry Pi with Node-RED. I have solid experience with LoRa, RS485, low-power firmware, and automation systems. Scope of Work • Slave firmware with RS485 readings, fast-interrupt inputs, valve control, sleep modes, battery and temperature alerts. • Reliable bidirectional LoRa communication with frames for read, act, and configure. • Master flow in Node-RED to send/receive commands. • Clean source code, documentation, setup guide, and remote support for your two students. I can perform this project smoothly and professionally. Best Regards,