1. How an underground garage stays online
A smart garage covers garage management, parking guidance, charging management, and barrier gates. Parking bays, barriers, charging piles, and video report over 4G. Underground garages often have no cable, so 4G is what holds coverage. SimtoLink supplies property managers and parking operators with 4G SIMs, a data pool, and an API into the parking platform.
2. Guidance, the barrier, charging piles, and video
Management, guidance, and charging do not need the same bandwidth or the same freshness:
Parking guidance and finding the car
Bay detectors and guidance screens report empty bays over 4G, for guidance, reverse car-finding, and analysis.
Barrier gates and entry
Barriers and license-plate recognition report entries and exits over 4G, for frictionless payment, monthly passes, and visitor registration.
Charging piles
A charging pile reports status and transactions over 4G, for booking a charge, payment, and maintenance.
Video and security
Garage video comes back over 4G, for security monitoring, scratch evidence, and emergency linkage.
3. What the garage link has to guarantee
- Plate recognition and the barrier: The plate camera uploads the image over 4G as the car arrives and opens the barrier, so the car passes through quickly without stopping.
- Live bay status: Ultrasonic or geomagnetic sensors see whether a bay is taken and report it, for parking guidance and booked navigation.
- Video security: Garage cameras record around the clock, with AI alerts for wrong-way driving and illegal parking, and a way to look the event up later.
- Charging piles and service: Status, billing, and a remote restart, with WeChat and Alipay payment online.
- Payment without a booth: ETC or plate recognition deducts the fee and ties into the payment system, so the cashier window does not build a queue.
4. Barriers, bay sensors, and charging piles
Network type, bandwidth, and power draw differ by device. Match the SIM to the device and the job:
| Use | Recommended network | Why it fits |
|---|---|---|
| Barrier and plate cameras | 4G | Live recognition, barrier linkage, reporting |
| Bay detection sensors | NB-IoT | Occupancy, low power, wide coverage |
| Charging piles and payment terminals | 4G | Status, remote maintenance, online payment |
5. How much a garage device uses
A device typically uses about 50-200MB a month. Video sits higher. Pool SIMs by device type, keep 20%-30% spare, and use VPDN so the path stays private.
6. Security around entry and payment
The security level is high. The garage needs a VPDN, TLS, and an IP allowlist. SimtoLink provides the VPDN, a private APN, and real-name registration together.
7. Barriers, guidance screens, and car-finding terminals
For a smart garage, use 4G IoT SIMs on barrier gates, guidance screens, bay cameras, and car-finding terminals. Underground signal is weak, so the SIM should choose among operators. Guidance screens and the car-finding system need live data. The plan is built around 99.9% network availability, multi-operator selection, a data pool, and an API into the parking management platform.
8. From a retrofit plan to opening day
Take the rollout through these stages:
Pick the SIM by device type. Check coverage in the target garage, set the VPDN, APN, and allowlist, and alert at 80% of the data allowance. SimtoLink covers the work from the survey through opening. Contact us for a plan sized to the garage.