ESP32 SIM800L Project for vending machine

I am currently working with a vending system and basically need to know remotely how many coins have already been inserted for statistical and consumable management purposes.

There is a coin selector that only works with 1 pc of 1€ coin ([login to view URL]) which is connected to the main vending module through 3 wires: Red (12V), Black (GND) and White (Coin Signal Output).

Whenever a coin accepted by the coin selector is placed, a voltage of 12V is passed for about 1 second through the White wire, so the ESP32 should detect that pulse. The idea would be to place the equipment connected to the white wire and to react to the insertion of the coin with an SMS to a real time database.

I think that for this case the most suitable and cheap would be the ESP32 SIM800L But I amm open to suggestions.

The project must include all the software needed for ESP32+Database (preferably exportable to excel or similar) making it workable.

Skills: Database Programming, Arduino, Microcontroller, Electronics, Embedded Software

About the Employer:
( 0 reviews ) Penela, Portugal

Project ID: #24107436

31 freelancers are bidding on average €499 for this job


Hello sir, Myself [login to view URL] Sekhar,[login to view URL], phd in Electronics from cdeec Innovations,India. We have 15+ years experience designing and developing electronic products. We have in house pcb fabrication facility for pr More

€750 EUR in 7 days
(50 Reviews)

We are a team of Electrical and Electronics engineers and we are Excellent in the following areas: • Embedded C Programming. • VHDL/Verilog, LABView • Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC and STM More

€500 EUR in 7 days
(28 Reviews)
(24 Reviews)

hello i am a computer engineer,i have masters in computer engineering,i have experience for more than 8 years in arduino and electronics,i can make to u the required system for ur vending machines ,and deliver to u al More

€444 EUR in 7 days
(32 Reviews)

Hello I have got your job posting “ESP32 SIM800L Project for vending machine” and I am very much interested to work in your project. I am a circuit designer and have more than 5 years experience of working with th More

€500 EUR in 12 days
(44 Reviews)

Hi, I am an electronic engineer with more than 5 years of experience in Arduino based embedded systems development. The project based on ESP32 gotmy attention because I have completed many projects usjng ESP32 as wel More

€555 EUR in 20 days
(27 Reviews)

Hi! It's absolutely no problem to make your idea work. I have experience in ESP32 device design, both hardware and software, so I can help you with your project. We can discuss more details via chat. Thanks

€300 EUR in 10 days
(12 Reviews)

Hi, I have experience in ESp32 based IOT device development and also done IOT project using SIM800 to send data in form of .CSV file to remote server. You can check the projects completed by me in my profile portfolios More

€500 EUR in 30 days
(10 Reviews)

Easy project for me. I can make a simple online database which records date and time of every coin inserted. Excel file download is a nice option. From the excel you can make any statistics you want

€250 EUR in 3 days
(4 Reviews)

Dear client. I'm an Electronic Engineer with 10+ years experience in embedded system and electronic design, PCB layout design, firmware programming, routing, assembly, and control system fields. My main skills are bel More

€250 EUR in 5 days
(4 Reviews)

I am an Electronic Engineer and I will help you in making Arduino projects. I will provide you Arduino code and its simulation to see the output and kill all the worries. I have a great amount of interest in controlle More

€722 EUR in 25 days
(12 Reviews)

we will build your ESP32 SIM800L Project for vending machine Hi my Professional Aim is: (Services then Solutions then Satisfactions) I hope you are [login to view URL] an experience in this field from last 5 years i am sure i can More

€400 EUR in 7 days
(7 Reviews)

Hello, how are you? I hope you have a bright day/evening from your side. I DO NOT OUTSOURCE I have been a freelancer for the past 8 years, I believe that my experience and skill in this background will prove to be of g More

€500 EUR in 7 days
(6 Reviews)

Hello, I am interested in your project and I hope to help you realize it, I am passionate about electronics and embedded development and I hope to share with you my knowledge and experience. I can do this work in 7 da More

€250 EUR in 7 days
(2 Reviews)

Dear client, Nice to meet you. I am an electronic engineer for 7+ years. The important thing is that I had done the Sim800L+Arduino project such like this one.I am sure I can complete it on time with high quality. If y More

€750 EUR in 3 days
(8 Reviews)

Hi, no problem I have a T-Call esp32 board and some experience using esp32. I see several ways: 1) request and response using SMS 2) Using a database like Firebase for saving data 3) Using Google Drive (google apps scr More

€500 EUR in 7 days
(3 Reviews)

Hello, thank you for your job posting. I am a senior device developer. I have plenty of experience in firmware development and micro-controller developments. I can write the firmware based on Arduino, Raspberry Pi, Pic More

€700 EUR in 10 days
(2 Reviews)

Hey There, We're Industrial Professionals with having more than 5 years of wide experiences in Robotics with enabled IoT, various Electronic circuitry (Low and High Power Electronic circuits), Communication (BLE, RF Mo More

€250 EUR in 6 days
(0 Reviews)

Im a software engineer working actively on industrial internet of things domain. So i can make your request working smoothly. There is a question, is it possible to use data package? Why you want to use SMS?

€300 EUR in 7 days
(0 Reviews)

Hi! I like your project and I am sure I can deliver. I have a lot of experience with ESP32 and I can help you with this, make suggestions and improve the design, let me know if you want to discuss this.

€700 EUR in 25 days
(0 Reviews)