1. What a vending machine sends over cellular
A vending machine uses cellular to report sales, watch stock, raise restock alerts, reconcile payments, push content to the ad screen, and take remote maintenance. The VMS (vending management system) tracks lane state, the sales log, and restock jobs. A lane is the compartment that holds one product. Machines sit in malls, metro stations, offices, and campuses, often with no Wi-Fi or with Wi-Fi that drops, so cellular is what keeps them up day and night. SimtoLink supplies 4G SIMs to operators and machine makers, with a VMS link, a data pool, and batch activation.
2. Sales, screens, and service calls
A machine reports lane state, the sales log, payment results, and fault codes. It receives restock jobs, ad content, and remote commands. A screen that plays video asks for much more data than a machine that only posts sales.
Sales reconciliation and restocking
Lane state, the sales log, and payment results go up as they happen. Restock jobs and low-stock warnings need the machine to stay online day and night.
Ad screens and content
Ad screens and any camera need images and video pushed down. Machines with a screen typically use 200–500MB a month.
Remote maintenance and OTA
Fault diagnosis, remote commands, and firmware need 4G, including checks across many sites and fixing a machine without a visit.
Payment and the VMS
Mobile payment and scan-to-buy have to be checked online. The VMS then holds sales totals, reconciliation, and the operating picture.
3. What the machine link has to cover
- Online without reliable Wi-Fi: Malls, metro stations, offices, and campuses often have no Wi-Fi, or Wi-Fi that drops. Cellular is what keeps the machine selling around the clock.
- Sales and payment: Lane state, the sales log, and payment results need to go up as they happen. Mobile pay and scan-to-buy have to be checked on the network.
- Restock and faults: Restock jobs, low-stock warnings, and fault diagnosis need a steady link, including a sweep of many sites and a fix that does not wait for a visit.
- Screens use more data: A machine with an ad screen is typically 200–500MB a month. Sales-only traffic is about 100–200MB. Pool SIMs by machine type.
- VMS: Sales totals, reconciliation, and operating reports live in the vending platform. The API is how that data stays in one place.
4. Which SIM fits which machine
Bandwidth follows the model and where it stands. Use the table as a starting point:
| Use | Recommended network | Why it fits |
|---|---|---|
| Machine controller and sales reconciliation | 4G | Lanes, sales, payment, and the VMS |
| Machines with an ad screen | 4G | Content and video updates; higher data use |
| Sales-only machines | 4G | About 100–200MB a month, pooled by site |
5. How much data a machine uses
One machine typically uses about 100–500MB a month, and more if it has an ad screen or a camera. Pool SIMs by model and keep 20%–30% spare. The management platform can alert when a SIM crosses a threshold.
6. Security for payment data
Machines handle payment and transaction data, so treat them as medium security. Sessions need TLS/SSL, a private APN, and an IP allowlist. SimtoLink provides the private APN and completes real-name registration for the SIMs.
7. What SimtoLink would put in the machine
For the controller and the ad screen, use a 4G IoT SIM. The machine reports lane state, the sales log, and payment results, and a screen pushes data use up. SimtoLink plans for 99.9% network availability, a flexible data pool, and an API into the VMS.
8. Rolling machines out
Take a vending rollout through these stages:
Pick the plan from how the sites are spread, and check signal where the machines will stand. Set the APN and IP allowlist, alert at 80% of the data allowance, and keep a sweep across sites. SimtoLink stays with the project from the first location through the wider estate. Contact us for a plan built around those machines.