Description

MDB ESP32 Bridge Device

VMflow MDB (Multi-Drop Bus) bridge and interface module for vending machines, telemetry and MDB protocol development.

Designed for MDB master/slave communication, protocol analysis, telemetry, debugging and remote connectivity in vending machine environments.

MDB master and slave interface support
Bluetooth Low Energy (BLE)
Wi-Fi and MQTT connectivity
I2C expansion interface
Addressable RGB status LED
Open hardware designed with KiCad
Integration with the VMflow ecosystem

This project is part of the VMflow ecosystem, focused on open source vending machine infrastructure, telemetry and MDB protocol tooling.

GitHub

https://github.com/nodestark/mdb-esp32-cashless

Youtube

https://www.youtube.com/shorts/wKaXX6SeWW8

VMflow

https://vmflow.xyz

Google Play

https://play.google.com/store/apps/details?id=xyz.vmflow.target

Schematic and Layout

Schematic

mdb-dual-esp32s3-schematic.pdf

Download BOM(Bill of materials)

May 20,2026

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MDB ESP32 Bridge Device

ESP32 MDB bridge module: MDB master/slave interface, telemetry, debugging and protocol gateway

Published: May 20,2026

Standard PCB

BOM(Bill of materials)

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Under the Attribution-MIT License.

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Topic

IoT

ESP32

2026 KiCad PCB Design Contest

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