BitMed Link — Offline Drug-X billing, shared stock at every counter
A twelve-second loop. Internet remains disconnected while a local Wi-Fi router connects three pharmacy billing PCs. Each counter saves one bill for one unit of Drug-X in turn. The shared Drug-X stock starts at 120 units and decreases to 119, 118, then 117. Every saved bill is reflected at all three counters and in Inventory Sync over the local network. The sample resets between loops.
Internet
Disconnected
Wi-Fi Router
Local network connected
Counter 1
BitMed
Drug-X × 1
₹ 50.00
Pay
Drug-X · Stock
120
units
In sync
Bill SAVED - Drug-X
Counter 2
BitMed
Drug-X × 1
₹ 50.00
Pay
Drug-X · Stock
120
units
In sync
Bill SAVED - Drug-X
Counter 3
BitMed
Drug-X × 1
₹ 50.00
Pay
Drug-X · Stock
120
units
In sync
Bill SAVED - Drug-X
Inventory Sync
Drug-X
Shared stock · units
120
Ready for offline billing
Counter 1
120
Counter 2
120
Counter 3
120
All 3 counters in sync · Local Wi-Fi