Send machine photos
Controller, payment module, wiring, model label, and target action.
Guides
QR retrofit cost
What drives QR payment retrofit cost for vending machines.
Use this guide to estimate the main cost drivers before requesting a quote. The board is only one part; interface, payment integration, wiring, and testing usually decide the project scope.
Interface auditPayment callbackSample testRollout planning
Part of QR Payment Controller Board for Scan-to-Start Machines
Project fit
For budget planning before a retrofit quote
Buyer signals
- Existing vending or self-service machines need QR payment.
- You are comparing a payment box, control board, or full replacement.
- You need to estimate sample and rollout effort.
- You want to avoid quoting before the interface is confirmed.
What to send first
- Machine photo or existing board photo
- Interface or wiring note if available
- Target action after API command or payment
- Whether telemetry or data upload is required
Not the right fit if
- You only need a pure payment acquiring account and no machine-side control.
- There is no physical machine action after payment, booking, or API approval.
- The project has no machine photo, board photo, wiring note, or interface clue yet.
Integration model
Cost follows interface and integration scope
A photo-based interface check is the fastest way to reduce uncertainty. MDB, pulse, relay, serial, and OEM paths have different board, wiring, firmware, and testing effort.
- Board and enclosure
- Control board, power, connectors, enclosure, and mounting
- Machine interface
- MDB, pulse, relay, serial, or custom wiring; isolation and sensors may add cost
- Payment integration
- QuLink QR payment or your provider callback, webhook, reconciliation, and timeout rules
- Data and firmware
- Telemetry, vend/session result, fault alerts, OTA, and OEM profile
- Testing and rollout
- Sample unit, wiring changes, installation, pilot, spare units, and support
Workflow
From machine interface to API-controlled result.
Confirm interface
Identify MDB, pulse, relay, serial, or OEM path and any missing signals.
Define payment flow
Decide who confirms payment and what the machine must do on success, failure, or timeout.
Quote sample and rollout
Separate one-unit sample cost from fleet hardware, installation, and support.
API example
A clear server command or webhook for the machine-side action.
The exact command fields depend on machine interface, firmware profile, and whether payment or your own app triggers the action.
POST /v1/devices/VEND-77/commands
{
"command": "dispense",
"source": "qr_payment",
"reference_id": "RETROFIT-QUOTE-001",
"machine_action": {
"interface": "mdb_or_relay",
"slot": "C02"
}
}
Project RFQ
Send a machine photo. We help identify the board, interface, and next test step.
Send machine photos and the target payment flow. We will help identify the likely board, wiring scope, and sample test step before quoting.
A good first message
If you are unsure about the exact interface, send what you have. Photos often answer more than a long spec.
- Machine type and target country
- Machine photo, board photo, or wiring photo
- Action after payment or API command
- Need data upload? expected quantity?
Fastest first step
- Send a machine photo
- Describe the action after API or payment
- Tell us if data upload is needed
FAQ
Questions buyers usually ask before a sample test.
How much does a QR retrofit cost?
It depends on the machine interface, board, wiring, payment integration, and testing scope. A photo-based check is needed before a meaningful quote.
Is a payment box cheaper?
A payment box may be simpler for some machines, but it may not control the machine or return vend and session results. Compare the full workflow, not only hardware price.
Can we retrofit without replacing the controller?
Often yes when the machine exposes MDB, pulse, relay, or a compatible start input. The sample test confirms it.
What is usually underestimated?
Wiring changes, payment timeout and failure handling, installation labor, and spare units are commonly underestimated.
How do we reduce risk?
Start with one machine, confirm the interface and payment callback, then plan the rollout.