The basic principle of POS system is to create commodity data in a computer file, directly read the barcode on the commodity through the online structure of the computer cash register and the optical reading device on the cash register equipment (or directly input the code through the keyboard), and then display the commodity information (unit price, department, discount ...) immediately, so as to speed up the cash register and correct it. The detailed information of each commodity sale (price, department, time period and customer level) is automatically recorded and then sent back to the computer by the online framework. Through computer calculation and processing, various sales statistics and analysis information can be generated as the basis for management.
The POS machine reads the magnetic stripe information on the cardholder's bank card through the card reader, the POS machine operator inputs the transaction amount, and the cardholder inputs the personal identification information (i.e. password). The POS machine sends the information to the issuing bank system through the UnionPay center to complete the online transaction, give the information of success or failure, and print the corresponding bill. The application of POS realizes the online consumption of credit cards, debit cards and other bank cards, ensures the safety, rapidity and accuracy of transactions, avoids complicated labor such as manual blacklist inquiry and bill pressing, and improves work efficiency.
The design requirements of magnetic stripe card module meet the needs of three-track magnetic cards, that is, the module should be able to read magnetic cards with 1/2, 2/3 and 1/2/3 tracks.
Credit card pos machine:
Enter the amount to be swiped on the POS machine;
Insert the magnetic stripe (or ic chip) of the credit card into the POS machine and read the++information of the credit card;
Enter the credit card password and confirm it;
Verify the password, the transaction is successful, and print the POS document.