ESP32 (or ESP8266) pcb and firmware design (IOT data-logger)

The “IOT data-logger” Project

IOT Data-logger for HVAC-R, based on open source platforms.

The product

-The total cost of the data-logger should not exceed 9usd.

We need a solution based on SOC esp32 (or esp8266) and NodeMcu firmware (LUA).

-The data-logger should have data storage memory in the absence of available network and backup battery.

-Scalability and acceptance of different types of additional sensors (DS18B20 sensor, door sensor, RH, pressure etc)

-Up to 8 sensors/data-logger (for the esp8266 multiplexing is needed as it has only one analog input).


-The firmware (or at least sample rate and other settings) should be updated remotely via internet.

-M2M communication should be based on an open source MQTT Broker like Mosquito

-Connection with Amazon server (AWS)

After this first phase we will need help for:

Web page and APP development

-"WEB to SMS" with HTTP API

-Online management interface with triple access level: end user, technician, supervisor.

-End user should see, search, print and export data

-Easy changeable settings for data-logging from UI.

-Supervisor should set upper and lower limits per client for sample rate / data sending, open close accounts etc.

-notification (alert) using SMS under regulated conditions

-push notification via APP on android/iphone

-email alerts

-maybe a solution based on OpenHAB with custom front-end and back-end.

Turn key solution is welcomed, but we need to know fixed price for every part of solution pcb design, firmware, webpage, app

Budget refers to first phase only (PCB design and firmware)

Skills: Product Design

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About the Employer:
( 0 reviews ) Thessaloniki, Greece

Project ID: #13368695

15 freelancers are bidding on average €1180 for this job


Hi! I am Jordan, new one on Freelancer , a CE products and Disney & Marvel characters toys designer from China. I have 10 years of experiences in products design, molding and assembly. I have good knowledge of material More

€1578 EUR in 30 days
(4 Reviews)

Hello, Have a great day. We are a startup company offering services in product development. We will ship you fully working prototype. Please feel free to contact us. Best Regards, Shahbaz.

€2000 EUR in 30 days
(8 Reviews)

Hi, Please share your complete project requirements(like any mechanical details, a block diagram)/task expected from us. About us: We have 10 years of experience in Product development. Micro-controllers we c More

€1388 EUR in 26 days
(1 Review)

Hello, look my profile. There are pictures of project in progress with esp32. We are professional team from Bulgaria. We are one of the first that use esp32 in our projects.

€1200 EUR in 30 days
(2 Reviews)

Hi, Okay, I am ready to do your job and please contact me so that we can discuss about the project further detail And you can check my portfolio :-[login to view URL] More

€1000 EUR in 20 days
(3 Reviews)

Hi Sir, We are experienced engineers and professional developers and we have completed similar data logging IOT projects before. We assure you quality of service. so lets talk on your project. We offer our se More

€750 EUR in 20 days
(1 Review)

Hello. I have 3 year expirience with microcontroller and more then 2 with ep8266 dev. alredy have few project that used thi module, MQTT and other. I think I can do it better then any other.

€1000 EUR in 20 days
(0 Reviews)
€1250 EUR in 20 days
(0 Reviews)

I have designed multiple ranges of Data-Loggers for two decades they are now used by Defence,Railways and industrial units. ESPXX has an unit price of $20-25 single unit, we can only decrease cost if we manufacture /f More

€1250 EUR in 20 days
(0 Reviews)

I am working on like this project but I used rn1723 wifi module .

€833 EUR in 45 days
(0 Reviews)

I'm an italian electronic engineer with more than 14 years of work experience. I work as HW designer; FW and SW developer. As HW designer, I work in Altium, KiCad and Orcad and I have experience in development singl More

€1250 EUR in 60 days
(0 Reviews)

This is quite similar to a personal project I've completed for realtime power monitoring with the ESP8266. For this I multiplexed 7 current transducers and a voltage sensor to the ESP8266's internal ADC to provide real More

€1333 EUR in 20 days
(0 Reviews)

Hello Sir, Hope you are fine there. We are having good experience with Mobile App projects and the reason we came across here to give the best output to your project with supreme quality. We have developed More

€780 EUR in 15 days
(0 Reviews)

Hello, Hope you are doing great. I have reviewed your job description deeply and very confident to handle this project perfectly. I'm a professional in website development (PHP, Codeignitor, CRM, Wordpress, Joomla, More

€1250 EUR in 20 days
(0 Reviews)

We have developed similar IoT Projects and we could develop an ideal solution for you. We request for a meeting you with to discuss on project details and clarifications and we can plan and bid an appropriate quote. More

€833 EUR in 30 days
(0 Reviews)