Arduino/ESP32 as slave device for MDB vending machine

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I understand you are looking for someone to create an Arduino/ESP32 firmware to connect it to your coffee machine as a slave device like a cashless device. My expertise and experience in the field of electrical and electronics will be an asset to help you solve this problem. I have extensive knowledge in Arduino and Electronics which will be used to design the firmware for your project. Furthermore, I have experience in microcontroller PCB layout which will be an added advantage when designing the system firmware for your coffee machine. I believe that my skillset and experience make me the perfect fit for this project and would love to discuss further how my services could benefit you please feel free to reach out any time!

Its me Imad, can i help u out in this project thanks...................................................................

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I can do the task right now within a very short deadline . I have one question which is the communication protocol used by the coffee machine (e.g., I2C, SPI, or UART/Serial)?

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