Arduino/ESP32 as slave device for MDB vending machine -- 2

I am looking for an experienced Arduino/ESP32 developer to assist with integrating a slave device for an MDB vending machine.

It's need to create Arduino/ESP32 Firmware to connect it to coffee machine as slave device like Cashless Device.
functional:
1. Give amount to coffee machine
2. Set "payment" result
3. Wake up coffee machine
4. Get error information like coffee or water was ended

Main Purpose:
- Remote monitoring and control of the vending machine.

Specific functionalities:
- Cashless payment integration.

MDB vending machine model:
- No specific model is required, any model would work.

Skills and experience required:
- Proficiency in Arduino/ESP32 programming.
- Experience with MDB vending machine integration.
- Knowledge of cashless payment systems.
- Familiarity with remote monitoring and control of devices.