Selling when the internet goes down
Outages arrive on the busiest evening. What matters is whether your counter keeps moving, and whether you can reconstruct the shift afterwards.
Decide which parts really need the network
Ringing an item, printing a receipt, and taking cash do not need the internet. Card payment, cloud reports, sending a booking confirmation, and syncing to the portal do. Make that list for your own shop, because it tells you exactly what an outage costs you and what it does not.
A till that stops is worse than a slow one
The question to ask a vendor is not whether it works offline, but what exactly stops. If the catalogue is downloaded on demand, the shop stops at the first failed request. Sen Kasa keeps the catalogue, the prices, and the sale itself on the device so the counter keeps working, and syncs what is waiting once the connection returns.
Cards are the part you genuinely cannot fake
A card payment needs authorisation. When it cannot be obtained, the honest answer is that the sale is not paid: never mark it paid and hope. Have a cash fallback, know where the nearest ATM is, and have a rule staff can apply without calling the owner at eight in the evening.
Write down what happened
The shift after an outage is where money goes missing. Keep sales in the till rather than on paper wherever you can, note the ones you could not, and reconcile cash, card, and the provider's report the same evening while somebody still remembers.
The dull preparations that pay for themselves
A charged battery or a small UPS for the till and the printer, the shop's mobile hotspot password written where staff can find it, spare paper, and a printed copy of the day's bookings. None of it is interesting. All of it turns a lost evening into an inconvenient one.
Check the sync afterwards, do not assume it
When the connection returns, look: is anything still queued, did every sale reach the reports, did a duplicate appear. An outage that seems to have healed and quietly did not is discovered at month end, which is the expensive time to discover it.