Payment & hardware integrationInternship projectPrototype evidence available

BCH Vending Machine

A vending workflow connecting a Vue interface, Python backend services, BCH transaction handling, the Paytaca app, and Raspberry Pi hardware control.

View project evidence

Role: Web Developer Intern
Ownership: Internship project
Source: Internship team project; evidence folder available
Stack: Python · Django REST · Vue · Raspberry Pi

BCH vending machine prototype selection interface

Context

The system and the operational problem.

A payment-backed vending flow has to coordinate user selection, transaction state, confirmation, hardware action, and failure handling. Software and physical outcomes must remain aligned.

Responsibility

What I owned and what I contributed.

Contributed during an industry internship in a collaborative environment, with focus on Python and Vue application behavior, external BitCash transaction integration, and Raspberry Pi communication.

Constraints

The engineering challenge.

01
Keeping payment confirmation and physical dispensing in the same state
02
Handling external API responses and incomplete transactions
03
Connecting web application events to Raspberry Pi hardware actions

Approach

How the problem was framed.

01
Model the vending flow as explicit states from selection through transaction confirmation and dispense.
02
Treat external payment confirmation as a boundary before allowing hardware action.
03
Keep interface feedback visible so the user understands pending, confirmed, and failed states.

Implementation

The layers that made the workflow work.

Frontend

Vue-based selection and transaction interfaces for vending and cash-in paths.

Backend

Python and Django REST workflows for transaction coordination and API communication.

Integration

BitCash API and Paytaca-supported BCH transaction flow.

Hardware

Raspberry Pi communication connecting confirmed application states to vending behavior.

Operational value

Concrete outcomes, without invented metrics.

Connected a user-facing payment flow to a physical vending prototype.
Made transaction and hardware state part of one coordinated workflow.
Demonstrated cross-discipline debugging across interface, API, payment, and device layers.

Engineering reflection

Hardware integration makes error states tangible. The software must be explicit about when a transaction is safe to translate into a physical action.

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