MDB · Ethernet · OTA · Tap-to-Pay
Modern payment technology and remote management for Wash Select II and legacy vending systems — without replacing what you already own.
The Technology
The Advance Interface reads your existing equipment without modifying it — then connects it to the modern world.
01 — DETECT
Our controller passively reads the Wash Select II data bus — detecting machine and transaction state in real time without touching any existing wiring.
02 — COMMUNICATE
The Advance Interface communicates natively over the Multi-Drop Bus as an MDB Level 3 VMC, supporting Nayax, Cantaloupe, and other major cashless readers with full vend session management.
03 — CONNECT
Built on the WT32-ETH01 module with a dedicated LAN8720A Ethernet chip — not WiFi. Reliable wired connectivity means no dropouts at the car wash.
04 — MANAGE
Monitor device status, view transaction history, manage pricing, and push firmware updates from anywhere — via the mobile app or web dashboard. No on-site visit required.
Product Line
Every AdvanceVendTech product shares the same proven MDB firmware stack and remote management infrastructure.
Drop-in MDB payment controller for the Unitec Wash Select II. Connects any MDB Level 3 cashless reader — Nayax, Cantaloupe, and more — to your existing car wash equipment without replacing the paystation.
The same Advance Interface hardware running bay-activation firmware — enabling cashless payment and remote activation for self-serve car wash bays.
Bring tap-to-pay and remote telemetry to legacy vending machines. Installs alongside existing coin mechanisms and bill validators — no machine replacement needed.
Technical Specifications
Designed from the ground up for 24/7 commercial operation in car wash and vending environments.
Processor
ESP32-D0WD-V3 240MHz Dual Core
Network
10/100 Wired Ethernet (LAN8720A)
MDB Protocol
Level 3, 9600 baud, RMT hardware
Flash Storage
8MB Flash + SD Card logging
Security
Secure Boot V2 (RSA-PSS) + AES Flash Encryption
Updates
Over-the-air (OTA) with signature verification
State Detection
Proprietary passive bus monitoring
Power
12V / 5V dual supply included
Form Factor
Modular — WT32-ETH01 swappable
Compatible Systems
No replacement required. The Advance Interface integrates with what you already own.
Why AdvanceVendTech
Designed and built by a car wash owner who couldn't find an affordable, reliable solution — so built one.
Your existing paystation, coin mechanisms, and bill validators keep working exactly as before. The Advance Interface adds capability without removing anything.
Not a generic IoT device bolted onto a payment adapter. Every byte of the MDB protocol is handled in custom RMT hardware firmware, tuned for Nayax Level 3 compatibility.
Car washes are wet, RF-noisy environments. Ethernet means no dropouts at the worst possible moment — during a customer transaction.
The WT32-ETH01 compute module plugs in. If it fails, your customer replaces a $15 module — not the whole board. Designed for serviceability in the field.
Monitor status, view sales, change prices, and push firmware updates from your phone. No site visits for routine management.
Documented hardware, signed firmware, and OTA infrastructure built to support regional distributors and multi-site operators at scale.
Get In Touch
Whether you operate a single car wash or manage a regional network, we'd like to talk.
Location
San Antonio, Texas
Distributor Inquiries
We're actively expanding our distributor network. If you service car wash or vending equipment in your region, let's talk.
Company
Advance Vend Technologies LLC
San Antonio, Texas