
In Progress
Posted
Link a Vending machine with an esp!
Project ID: 40542151
31 proposals
Remote project
Active 5 days ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs

I offer to connect the firmware to the real ESP32, linking it to your WiFi and the backend, validate the physical dispensing with confirmation (lock wiring and its feedback), and provide you with the complete handover so you can run the system on your own accounts: source code, installation guide (PlatformIO and pin reference), and all configuration, including Mollie.
€450 EUR in 10 days
0.0
0.0
31 freelancers are bidding on average €39 EUR/hour for this job

With over a decade of experience as an Electrical Engineer and a Master's degree specializing in Embedded Systems, I am highly equipped to link your Vending machine with an ESP. I have extensive knowledge and hands-on experience working with various microcontrollers including STM32, ESP32, Raspberry Pi, and Arduino- the exact skill set your project demands. As showcased in my profile, firmware development is my forte; I am proficient in embedded C/C++ and have developed wireless stacks such as BLE, Wi-Fi, LoRa & Zigbee. Moreover, my expertise includes PCB Design, RF Hardware, FPGA Development and even AI Integration. This means that not only will I seamlessly link your vending machine with an ESP but also offer intelligent algorithms for edge devices if required. With my profound technical proficiency combined with my dedication to providing holistic solutions; from idea to prototype and then final product, you are assured of a market-ready firmware that would deliver smart automation and efficient processing for your vending machine. I believe value creation extends beyond firmware development which is why I also bring to the table my all-round Product Development Workflow.
€36 EUR in 40 days
8.3
8.3

As a seasoned engineer with an extensive range of skills and unparalleled experience in the electronics and embedded systems field, I am confident that I can not only link your vending machine with an ESP but also optimize its performance through my in-depth knowledge of Arduino, C/C++, and Microcontroller programming. My proficiency extends to designing power electronics systems, an indispensable skill when it comes to integrating ESPs for more robust operations. Additionally, my expertise in digital motor control and analog design ensures that the vending machine will run smoothly by leveraging the full potential of the ESP's functionalities. My specialized understanding of low power distribution and noiseless op-amp based circuitry will also contribute to eliminating any potential electromagnetic interference or voltage fluctuations Leveraging my experience with renewable energy technologies and PCB design, I can guarantee a holistic approach towards your project. Not only will I provide you with an efficient solution for this specific task, but I will also venture beyond the minimum requirements to ensure your vending machine is fully optimized for every possible scenario. Let me bring my unique proficiencies to bear on your project and ensure its success. Let’s embark on this project together!
€25 EUR in 20 days
7.4
7.4

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in C Programming, Electronics, Microcontroller, C++ Programming, Arduino, Full Stack Development, Firmware, Embedded Systems, Hardware Security Module and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
€25 EUR in 5 days
6.4
6.4

Hey there! I'm really pumped about this opportunity! I recently led a project with similar challenges and nailed it. Drawing from my experience in C Programming, Electronics, Microcontroller, C++ Programming, Arduino, Full Stack Development, Firmware, Embedded Systems, Hardware Security Module, I’m ready to dive into your project. Please come over chat and discuss your requirement in a detailed way. Cheers, Vishal Maharaj
€30 EUR in 40 days
5.3
5.3

As an accomplished Electronics Engineer with over 8 years of experience, I believe I am the most qualified to undertake this crucial vending machines and ESP linking project. I boast extensive knowledge in RF engineering, embedded systems, and high-power electronic design which are fundamental to ensure a reliable and efficient linkage process. My profile also showcases exceptional skills in PCB layout, firmware development using C / C++ / embedded and power electronics analysis. These competencies combined bolster my ability to design and test robust hardware solutions that align with your project vision. Throughout my career, I have successfully executed projects from concept to final implementation ensuring they adhere to the highest standards of safety, reliability, and performance - a characteristic which directly resonates with your needs. My familiarity with Arduino, C Programming, C++ Programming, and Microcontroller operation also puts me in a strong position to fully integrate your Vending machine with an ESP system. Additionally, my proficiency in troubleshooting, system integration, and project management guarantees smooth collaboration with multidisciplinary teams and timely delivery of high-quality work - even under pressure. In choosing me for this task, you can confidently expect meticulous attention to detail,in-depth problem solving strategies as well as innovative solutions oriented toward achieving your definite vending machine goals.
€27 EUR in 14 days
4.4
4.4

Hello, I see you want to link a vending machine with an ESP controller. With my strong skills in firmware development and embedded systems, I will create efficient, reliable control software using C programming to seamlessly integrate your vending machine with the ESP module. This will ensure precise operation and easy scalability. I can start immediately and deliver a prototype within a week. What specific functions or controls do you want to manage on the vending machine via the ESP? Thanks,
€18 EUR in 36 days
4.3
4.3

Hello, I understand that you are looking to link a vending machine with an ESP for control. This project holds significance in enabling automated control and monitoring of vending machines, enhancing operational efficiency, and providing real-time data insights. One potential challenge could be ensuring seamless integration between the ESP and the vending machine system. By linking the vending machine with an ESP, you can expect improved inventory management, automated sales tracking, and remote monitoring capabilities. This integration can streamline operations and lead to better decision-making based on data analytics. In my experience working with IoT devices and automation systems, I have successfully implemented similar projects involving IoT integration for control and monitoring purposes. Leveraging technologies like ESP32, MQTT, and custom APIs, I have developed solutions that enhance operational efficiency and data visibility. Two questions to consider: 1. Are there specific functionalities you would like to control or monitor through the ESP integration? 2. Do you have any existing systems that the ESP needs to communicate with for data exchange? I'd be happy to discuss the details, review your requirements, and recommend the most practical path forward before development begins. Best regards, Rahul S.
€18 EUR in 40 days
0.0
0.0

You've likely been through enough vague proposals to know the difference between someone who's read your brief and someone who's recycled a template. Identifying a real challenge: Integrating an ESP control system into a combo vending machine involves intricate hardware and software synchronization, demanding precise technical expertise to ensure seamless functionality. I will tackle this challenge by leveraging my extensive experience in IoT integration and programming to develop a customized solution that optimizes communication between the vending machine and the ESP module. My expertise in IoT and system integration aligns perfectly with this project's requirements. Not moving forward risks missing out on enhanced vending capabilities and potential revenue growth. Feel free to explore my profile for evidence of past successes in similar projects. How soon do you need the ESP control system operational for your combo vending machine? Regards, Joshua Jaime Saunders
€18 EUR in 7 days
0.0
0.0

I can help link your vending machine to an ESP and build the control logic for reliable operation. I’ll keep the integration clean, practical, and focused on making the machine respond correctly to the ESP-based commands. Jared
€18 EUR in 31 days
0.0
0.0

Hi, I'd connect the vending machine to the ESP using its existing MDB or pulse interface — most machines expose one of these, and the ESP handles either cleanly with the right firmware. The key is reading the vending machine's communication protocol correctly first so the ESP responds like a proper cashless payment device rather than fighting the machine's own logic, is the goal. In similar projects, I've built ESP32 integrations with vending hardware where MDB protocol handling and reliable serial communication were what made the difference between a stable deployment and a machine that randomly stops accepting inputs. Share the vending machine model and what you want the ESP to do — payment trigger, remote monitoring, or something else — and I'll confirm the approach and timeline immediately.
€18 EUR in 40 days
0.0
0.0

█▓▒▒░░░I can start connecting your vending machine to an ESP right now.░░░▒▒▓█ Hi, My name is ⭐Pavlo⭐, and I have strong experience with ESP32/ESP8266, Arduino, C/C++, UART, GPIO, relays, sensors, Wi-Fi, MQTT, and embedded firmware debugging. I can identify the machine interface, build reliable control firmware, add secure remote monitoring if required, and document the wiring, protocol, and setup clearly. Could you share the vending machine model, controller board photos, available communication ports, and the exact actions the ESP must control? Best regards!
€25 EUR in 40 days
0.0
0.0

I can effectively generate and qualify leads for your ESP control in vending. My approach will ensure that you receive well-vetted leads ready for closing. Here’s my plan: - **Lead Generation**: Utilize targeted strategies to identify potential clients in the vending industry. - **Cold Calling**: Conduct direct outreach to engage leads and gather necessary information. - **Qualification Process**: Assess leads based on your criteria to ensure they are ready for conversion. - **Information Transfer**: Provide you with a detailed summary of each qualified lead for seamless handoff. - **Communication**: Maintain clear and direct communication throughout the process to align on expectations. Can you specify the target market segments you’re most interested in? I can start immediately and look forward to working directly with you. Best, Artem
€27 EUR in 40 days
0.0
0.0

Hi, I have experience with ESP-based embedded systems, firmware development, and hardware integration. I can connect your vending machine with an ESP, implement reliable communication, and deliver a stable, well-documented solution. Best regards.
€18 EUR in 40 days
0.0
0.0

Most failed vending-to-IoT projects stumble not from the ESP code but from unreliable dispense confirmation and unsafe electrical interfacing — you need a dependable sensor and isolation as much as the Wi‑Fi code. I propose a small iterative delivery: a hardware interface board (optically isolated relay/triac or MOSFET + flyback and current sensor), an ESP-based firmware that drives the actuator and reads a dispense sensor, and a lightweight cloud endpoint for status/commands. Start with a proof-of-concept that can remotely trigger a vend and report success/failure. For hardware/software: use an ESP32 (or ESP8266 if cost is critical) with Arduino or ESP-IDF, ACS712 or hall-effect current sensor for motor/load sensing, an optical interrupter or vibration sensor for dispense confirmation, opto-isolation for mains, MQTT over TLS or HTTPS for control, and OTA + secure boot/flash encryption for firmware security. Design firmware for robust retries, debouncing, watchdog, and OTA; keep the interface modular so you can swap sensors or add telemetry later. I typically deliver a wiring diagram, PCB suggestion, and minimal firmware for validation. Relevant work: built Program Pro’s adaptive engine — real-time decisions from noisy inputs, reliable state management, and rollback-friendly releases. My bid is €27 (in your range). Do you have an existing dispense sensor or access to the motor terminals (so I can specify whether to use current sensing or a mechanical/optical sensor)?
€27 EUR in 7 days
0.0
0.0

As a full stack developer and embedded systems engineer, I'm excited about the proposition of linking a Vending machine with an ESP. My name is M Mobasher, and I possess a wealth of experience in both software development as well as DevOps which would translate perfectly into this project. I'm skilled in c programming and have spent considerable time working with embedded systems, making me proficient in dealing with automation and IoT devices like ESPs. In addition, I've also honed my expertise in cloud computing, specifically within AWS, Azure, and GCP - all areas that will come into play when connecting your vending machine to ESP through APIs. The use of cloud computing can elevate the capabilities of your system by allowing you to work with real-time data.
€27 EUR in 40 days
0.0
0.0

Biebertal, Germany
Payment method verified
Member since Jan 25, 2016
€18-36 EUR / hour
€251 EUR
€30-250 EUR
€12-18 EUR / hour
€30-250 EUR
€6-12 EUR / hour
$10-30 USD
£20-250 GBP
£10-20 GBP
$3000-5000 CAD
$750-1500 USD
€250-750 EUR
₹750-1250 INR / hour
₹750-1250 INR / hour
$25-50 USD / hour
$250-750 USD
₹1500-12500 INR
€30-250 EUR
€18-36 EUR / hour
$250-750 USD
₹1250-2500 INR / hour
₹750-1250 INR / hour
₹1500-12500 INR
₹1500-12500 INR
$250-750 USD