Borrow, return, and the cabinet that has to stay up
A shared power bank borrows and returns through a cabinet host, and sometimes through a module inside the bank itself. That link runs the borrow-and-return flow, scan-to-pay, billing and reconciliation, slot status, and fault alarms. Cabinets sit in malls, restaurants, and hotels, and they need 4G if they are to stay online 7×24. SimtoLink modules for this work are 4G / NB-IoT / LTE Cat.1, industrial-grade, with UART, SPI, and I2C. The company supports 500+ enterprise customers and has connected more than 10 million power banks.
Cabinet, bank, payment, and the truck that restocks
The host in the cabinet, the radio inside a bank, the payment, and the dispatch of charged units are four different jobs on one fleet. The notes below are how each one uses the module.
The cabinet host
A multi-slot cabinet goes online over 4G, takes borrow and return orders, and reports slot status and billing. That is what keeps the cabinet up 7×24 and holds the transaction success rate the renter feels.
A radio inside the bank
NB-IoT or LTE Cat.1 inside the bank lets it report on its own and be tracked if it goes missing. Charge level, location, and the rest of the life of that bank stay visible after it leaves the slot.
Aggregated payment and revenue share
After the scan, transaction data goes to the payment platform in real time. That supports aggregated payment, revenue-share settlement, and reconciliation, so the venue and the platform both see the same money.
Dispatch and a warning to restock charge
Cabinet faults, slot occupancy, and charge level go up through the module. That drives dispatch, a restock warning, and a fault ticket, which is how availability stays up without a technician walking every mall.
Running the sites
A chain of sites joins one operations platform through the module. Cities and venues can be run together, with site analysis and a restock plan that follows the data.
What the borrow data is for
How often a bank leaves, how long it is out, and how fast it turns over all meet in the module. That record feeds operations analysis, which sites to keep, and a forecast of what they earn.
What a cabinet indoors asks of the module
- Coverage inside a mall or a hotel: Several operators and bands are what hold indoor coverage and roaming handover.
- No gap during a payment: Borrow, return, and pay cannot sit through an outage. The module has to stay up so the success rate holds.
- Small, and able to sleep: A module inside a bank has to be small, standby for a long time, and support PSM and eDRX.
- Heat on a cabinet that never stops: The cabinet runs 7×24. The module needs −40°C to 85°C and has to take heat, indoors or out.
- The MCU and the scanner: Those two, over TCP, UDP, and MQTT, into the payment platform and the operations platform.
Which radio fits the cabinet, and which fits the bank
The host and the bank inside it do not share a power budget or a delay. How live the borrow has to be, and whether the radio sits in a mall, should decide the module. The rows below split the two.
| Job | Radio | What matters |
|---|---|---|
| Cabinet host | 4G | Borrow and return in time, payment, slot reports, success rate |
| Radio inside the bank | NB-IoT LTE Cat.1 | Very low power, a small board, loss tracking, the life of the bank |
| Payment and settlement | 4G | Transactions reported as they happen, revenue-share reconciliation, payment that stays up |
| Operations and site management | 4G | Fault alarms, a restock warning, several operators, across cities |
How SimtoLink fits a power-bank program
For this fleet, the modules are industrial designs that hold a wide temperature range, with technical support 7×24. 4G is the recommendation for the cabinet host, so borrow, return, and pay stay timely. NB-IoT or LTE Cat.1 fits a radio inside the bank, where cost and size both count. Work with mainstream chip vendors, a named account manager, and an SDK a cabinet team can bring up quickly come with the module.
A cabinet design is taken from the requirements and the radio choice, through a prototype on one unit, and into volume. Documentation, the AT command set, an SDK, and sample code ship with the module, and supply is planned for a production run and for later years. Shared charging keeps adding cabinets, and the module line will follow that demand.
How a cabinet project usually moves
A shared-charging project usually moves in this order:
The choice turns on cabinet or bank (the host wants steady 4G; the bank wants low power and a small board), how live borrow and return must be (a payment cannot sit through an outage), and the site (a mall or a hotel needs more than one operator). Start with one cabinet and check the borrow rate, payment stability, and coverage. The host should use 4G. A radio inside the bank can use NB-IoT or LTE Cat.1.
The radio is what borrow, pay, and restock stand on. SimtoLink has supplied modules to shared-charging operators.