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I need a compact, reliable humidity-logging solution that can capture readings at regular intervals and send them straight to Google Cloud Platform in near-real time. I am open to microcontrollers such as ESP32, Raspberry Pi, or any low-power alternative, provided the final build can connect over Wi-Fi or LTE and push data securely—ideally through Cloud IoT Core or Pub/Sub—into a time-series bucket I can later analyse with BigQuery or Data Studio. What matters most is that the entire path from sensor to cloud is proven and robust. You are free to suggest the specific humidity sensor, the firmware language (Arduino, MicroPython, C, etc.), and the best authentication method for GCP, as long as you keep power consumption modest and the solution easy to reproduce. Please highlight your relevant experience creating similar data-logging or IoT pipelines; that is the single factor I will weigh when selecting a freelancer. Deliverables • Bill of materials with part numbers and estimated cost • Fully commented source code / firmware ready to flash • Step-by-step instructions (or scripts) to provision the GCP resources and verify data arrival • Brief usage guide explaining how to calibrate the sensor, change sampling frequency, and monitor device health I will consider the project complete once a live device on my bench is pushing humidity readings to my GCP project and I can view them in a Pub/Sub subscription without errors.
Project ID: 40625727
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22 freelancers are bidding on average ₹363 INR/hour for this job

Hi, I’ve worked on cloud-connected software and can help build a compact humidity-logging pipeline with C Programming on a Microcontroller, then publish readings securely to Google Cloud Platform for near-real-time analysis. I’d focus on a robust sensor-to-cloud path, keeping the firmware simple, reliable, and easy to reproduce, with health checks and reconnect handling built in. I can provide the bill of materials, commented firmware, and the scripts or steps to provision GCP resources and verify that data lands cleanly in Pub/Sub and a time-series store. I’ll also make the calibration and sampling controls straightforward so the device stays easy to maintain. Which microcontroller and network option do you prefer for the first bench build? Relevant work: Which microcontroller and network option do you prefer for the first bench build?
₹1,000 INR in 40 days
6.7
6.7

Hello, I have expertise with ESP32, Raspberry Pi, STM32, Arduino, etc MCUs. I have also worked with Humidity sensor, WiFi, LTE, GCP, MQTT. We can discuss in detail over chat/meeting.
₹450 INR in 40 days
6.1
6.1

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq
₹250 INR in 40 days
5.3
5.3

hi there delivery within hours and fixed price 5000 i will use esp32 and HDT mqtt pub/sub to your GCP
₹250 INR in 40 days
4.7
4.7

Hello, I am Santosh Chaulagain, a professional Electrical Engineer and PCB Designer with over 7 years of experience in schematic design, PCB layout, and embedded systems, including ESP32, IoT devices, analog and digital circuits. I have successfully completed multiple projects for clients worldwide, delivering reliable and manufacturable designs. I have carefully reviewed your project requirements and I am confident that I can provide a high-quality solution tailored to your needs. My expertise includes PCB design using industry standards, component selection, BOM preparation, Gerber generation, and design optimization for cost and performance. I always ensure that my designs are fabrication-ready and tested for reliability. I focus on clear communication, timely delivery, and customer satisfaction. I am happy to discuss your project in detail and provide revisions until the final result meets your expectations. Looking forward to working with you. Best regards, Santosh C. Electrical Engineer | PCB Designer | ESP32 & IoT Specialist
₹200 INR in 40 days
3.7
3.7

Hi. I can build a reliable ESP32 humidity logger that securely sends near-real-time readings to GCP Pub/Sub. I have experience with ESP32 sensor firmware and cloud IoT pipelines, and will provide the BOM, commented code, GCP setup steps, and calibration and monitoring guide.
₹250 INR in 40 days
3.6
3.6

Hi, I have designed and deployed multiple end-to-end ESP32 and cellular IoT data loggers that transmit sensor telemetry directly to Google Cloud Platform via Pub/Sub and BigQuery. I will select an optimal, low-power digital humidity sensor, write clean C/C++ firmware with secure GCP authentication, and provide a complete bill of materials. I will also supply fully commented source code, GCP provisioning scripts, and clear documentation covering sensor calibration and sampling frequency adjustments. Best regards
₹300 INR in 40 days
2.1
2.1

Hi there! I reviewed your project details for the GCP-connected humidity logging system. Having built custom IoT sensor hardware, sensor data pipelines, and embedded-to-cloud architectures, I completely agree that bypassing deprecated services like Cloud IoT Core in favor of direct, key-based authentication into Google Cloud Pub/Sub via JWT or MQTT over TLS is the most robust, future-proof approach for an ESP32 or LTE board. For an ultra-compact and reliable build, an ESP32 coupled with a high-accuracy digital sensor like the SHT31 or BME280 via I2C gives you the best balance of low power consumption and reliable TLS encryption. On the cloud side, I can set up a light Cloud Run / Cloud Function endpoint or direct Pub/Sub ingest that streams your readings straight into a BigQuery time-series table. I will provide you with the complete BOM, pre-configured C++/Arduino firmware and clear calibration documentation. Let's connect in chat to confirm whether Wi-Fi is sufficient for your deployment or if we should use an LTE-M module for remote cellular connectivity. Looking forward to getting this built for you!
₹400 INR in 40 days
1.1
1.1

Hello, I'm bharghav, with 10 years of experience in creating robust IoT pipelines and C Programming. My expertise is perfectly aligned with developing efficient, C-based firmware for data-logging solutions. I understand you need a compact, reliable humidity logger sending data to Google Cloud Platform, emphasizing proven robustness and low power. I'll design a solution using a low-power microcontroller, secure Wi-Fi/LTE connectivity, and C firmware, pushing data to GCP via Pub/Sub, ready for BigQuery analysis. Let's start a chat to discuss your project further and outline the optimal path forward. Best regards,
₹280 INR in 3 days
0.4
0.4

Hi there, I am an IoT developer with direct, hands-on experience building custom ESP32 Automatic Weather Stations and real-time cloud logging pipelines. I can deliver your low-power, high-accuracy humidity logger connected directly to Google Cloud. Important GCP Update: Google permanently retired Cloud IoT Core. I will implement the modern Google-recommended path: streaming telemetry over secure HTTPS to a GCP Cloud Function, which pushes to Pub/Sub, streams into BigQuery, and visualizes in Looker Studio. Why Choose Me: Weather Station Track Record: I’ve engineered custom ESP32 weather stations using precision sensors (SHT31/BME280) built for continuous environmental logging. Low-Power Firmware: Deep-sleep optimization wakes the ESP32, transmits data, and returns to microamp sleep in seconds to maximize battery life. Turnkey GCP Setup: Automated scripts (gcloud CLI) to provision your Cloud Function, Pub/Sub topic, and BigQuery schema with zero manual hassle. Complete Deliverables: Hardware Bill of Materials (BOM) with part numbers and costs. Production-ready C++ Arduino firmware (with fail-safe Wi-Fi reconnects). Automated GCP provisioning scripts & BigQuery schema setup. Setup guide covering calibration, sampling intervals, and device health checks. Let’s connect to get your bench test running!
₹200 INR in 40 days
0.6
0.6

Hello, I have carefully reviewed your requirements for a humidity-logging system that sends data to Google Cloud Platform in near real time. I can develop the solution using ESP32 and a reliable humidity sensor such as BME280 or SHT31. The system will periodically collect humidity data, connect securely over Wi-Fi, and publish the readings to Google Pub/Sub for storage and analysis in BigQuery. I will provide fully documented firmware, a complete bill of materials, setup instructions for GCP, and a user guide explaining calibration and sampling-frequency changes. My experience includes embedded systems development, ESP32 programming, sensor interfacing, PCB design, and IoT projects. I focus on delivering reliable and easy-to-reproduce solutions. I would be happy to discuss the connectivity requirements and sampling interval before starting. Best regards, Muhammad Shehroz
₹250 INR in 40 days
0.0
0.0

I'm a electronics technician with 13+ patents and deep experience building IoT telemetry systems—including a multi-sensor WiFi gateway pushing NMEA2000 data to cloud and LoRa remote-control pipelines. I can deliver your humidity-logging solution end-to-end. I'd use ESP32 with a proven DHT22 or BME280 sensor, secure MQTT over TLS to GCP Cloud IoT Core, then route messages to Pub/Sub for BigQuery ingestion. Firmware in C/ESP-IDF ensures low power and reliability; I'll include calibration routines and interval-change via UART config. Deliverables: full BOM with costs, commented C code ready to flash, GCP provisioning script (gcloud CLI), and step-by-step bench-test guide. My SailSensor project proves this exact stack—wireless sensors, gateway cloud sync, real-time data validation. I work remote from Italy with clean invoicing. Are you targeting battery or mains power, and do you have a GCP project ready, or shall I include service-account setup? Battery or mains powered? Do you have an existing GCP project, or should I include full service-account and Pub/Sub topic creation in the setup script?
₹400 INR in 14 days
0.0
0.0

Hello, I'm an IoT and Automation Developer with experience building ESP32- and Arduino-based monitoring systems, firmware, and cloud-connected automation solutions. For this project, I would build a reliable end-to-end humidity logging system that securely sends sensor data to Google Cloud Platform using a lightweight and scalable architecture. **What I will deliver:** * Bill of Materials with estimated costs. * Clean, well-commented firmware for ESP32 or Raspberry Pi. * Secure GCP integration using Pub/Sub. * Step-by-step setup and deployment guide. * Instructions for sensor calibration, sampling interval changes, and device monitoring. I focus on reliable, low-power, and easy-to-maintain IoT solutions with clean code and clear documentation. I'm ready to start immediately and look forward to building this solution for you. Best regards, **Gervásio** IoT & Automation Developer
₹350 INR in 40 days
0.0
0.0

I am currently working on a similar ESP32-S3–based project with the hardware and firmware already developed and validated. The solution includes an MQTT-based dashboard for real-time monitoring and offers high measurement accuracy of ±1% RH (humidity) and ±0.1°C (temperature). DM to discuss details.
₹200 INR in 40 days
0.0
0.0

**Dear Client,** Your IoT humidity logging project aligns perfectly with my expertise in **ESP32, embedded systems, cloud IoT, and sensor integration**. **Please message me if you'd like to review my previous ESP32, MQTT, cloud IoT, and sensor-to-cloud data logging projects.** I have **15+ years of R&D experience** developing IoT devices using **ESP32, STM32, Raspberry Pi, Wi-Fi/LTE, MQTT, HTTPS, and cloud platforms**. I have built end-to-end sensor-to-cloud solutions with secure data transmission, remote monitoring, and low-power operation. I can deliver: * A compact, low-power solution using **ESP32** (recommended) or Raspberry Pi, based on your requirements. * Integration with a high-accuracy humidity sensor such as **SHT31** or **SHT40**. * Secure communication with **Google Cloud Platform** using **Pub/Sub** (or an equivalent supported architecture) with authentication and reliable data delivery. * Fully commented firmware, BOM with cost estimates, and complete setup documentation. * Step-by-step GCP provisioning guide, sensor calibration procedure, configurable sampling intervals, and device health monitoring. The solution will be optimized for reliability, low power consumption, and future expansion with additional sensors. **Best regards,** **Subhash Suman** ESP32 | IoT | GCP | MQTT | Sensor Integration | Embedded Systems | 15+ Years Experience
₹800 INR in 40 days
0.0
0.0

Hello, I’m an Electronics and Embedded Systems Engineer specializing in IoT product development from concept to deployment. I can design the complete solution, including hardware, PCB design, embedded firmware, cloud integration, and a responsive web or mobile dashboard. I have hands-on experience with ESP32, STM32, Raspberry Pi, MQTT, Firebase, Wi-Fi, BLE, RFID, Ethernet, and industrial automation systems. I focus on delivering reliable, scalable, and well-documented solutions with clean code and regular progress updates. Whether you need a prototype, custom firmware, or a production-ready IoT system, I’m committed to providing high-quality work on time. I’d be happy to discuss your requirements and help turn your idea into a successful product. Looking forward to working with you! Best Regards, Chiranjeev Singh Electronics & Embedded Systems Engineer
₹250 INR in 40 days
0.0
0.0

Hello, I am an Electronics and Embedded Systems Engineer with experience in IoT device development, ESP32 firmware, sensor interfacing, cloud connectivity, and data-logging systems. For your humidity-monitoring solution, I can develop a reliable end-to-end system that captures humidity readings at configurable intervals and securely transmits them to Google Cloud Platform using Wi-Fi or LTE connectivity. Based on your power and deployment requirements, I can recommend suitable hardware such as ESP32 with a high-accuracy humidity sensor (SHT31/SHT40 or BME280) and implement secure communication through Google Cloud Pub/Sub or other recommended GCP services. Deliverables will include: * Complete BOM with part numbers and estimated costs * Fully documented firmware source code * GCP provisioning and deployment guide * Data publishing and validation procedures * Sensor calibration and device-health monitoring guide * Configuration options for sampling intervals and cloud settings My experience includes ESP32-based IoT projects involving sensor monitoring, cloud integration, data logging, remote monitoring dashboards, and embedded firmware development using Embedded C and Arduino frameworks. I would be happy to discuss your preferred connectivity method, power requirements, and expected deployment environment. Best regards, Harsh Dudhani Embedded Systems & IoT Engineer
₹300 INR in 42 days
0.0
0.0

ESP32 and humidity sensor modules development time frame is around 12 billable days. If ESP32 chip with sensor chip needs to be used with custom board, development time will be revised to around 20 billable days.
₹600 INR in 30 days
0.0
0.0

Your requirement is essentially an end-to-end IoT telemetry pipeline: reliable humidity acquisition on low-power hardware, secure transport over Wi‑Fi/LTE, and stable ingestion into GCP with minimal operational friction. I can deliver this with a reproducible architecture focused on reliability rather than just a prototype demo. My recommendation would be an ESP32-based device paired with an industrial-grade humidity sensor such as the SHT31 or BME280, depending on the required accuracy and environmental conditions. The firmware can be implemented in C++/Arduino framework for stability and low resource usage, with secure communication through MQTT or HTTPS into Google Cloud Pub/Sub. Since Cloud IoT Core has been discontinued by Google, I would structure authentication using service-account based flows or signed JWT depending on the chosen ingestion path. The delivery would include the complete firmware, provisioning scripts for GCP resources, Pub/Sub validation flow, sensor calibration guidance, configurable sampling intervals, and monitoring/health-check recommendations. I also document the full setup process so the device can be reproduced or expanded later without vendor lock-in. From the cloud side, I can organize the telemetry flow so it is ready for downstream BigQuery analysis and dashboarding with Looker Studio or equivalent tools. The focus will be on a stable data path, low power consumption, recoverable connectivity, and clear operational visibility when devices go offline or stop publishing. I estimate around 15-20 hours for implementation, testing, and documentation depending on the final hardware/networking decisions.
₹400 INR in 14 days
0.0
0.0

Hi, I can help you build this humidity logging system from the sensor all the way to Google Cloud. I have experience working with ESP32, sensors, Wi-Fi, embedded C/C++, IoT systems, wireless communication and cloud-connected projects. I can build the firmware to read the humidity sensor at a configurable interval, maintain the Wi-Fi connection, securely send the readings to GCP, and handle connection failures so data is not lost unnecessarily. I will provide: • Hardware and sensor recommendation • Complete BOM with part numbers and estimated cost • ESP32 firmware with configurable sampling interval • Wi-Fi connection and reconnect handling • Secure communication with Google Cloud • Pub/Sub integration • Device health/status information • Fully commented source code • GCP setup/provisioning instructions • Testing procedure to verify data arriving in Pub/Sub • Instructions for changing sampling rate and calibrating the sensor I would also make the system easy to reproduce, so another device can be configured using the same procedure. Estimated delivery: 7–10 days.(after parts ) I can start by confirming the required humidity accuracy, sampling interval, power source and whether Wi-Fi is sufficient or LTE is required.
₹250 INR in 40 days
0.0
0.0

Roorkee, India
Member since May 27, 2021
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