What are the advantages of vending machines

More and more vending machines are put on the market. Many consumers are curious about this kind of retail terminal. Today, let me understand what the communication protocol of the vending machine is. The vending machine has its own dedicated communication protocol, Europe and the United States With MDB, Japan and South Korea use VCCS instead of 232485, CAN and other communication protocols on the market. At present, most domestic vending machines are used in Europe and the United States. 　　 When the source of the machine is sufficient, it can identify the acceptance of cash. When consumers choose goods, they judge whether the cash is enough to pay, whether the change of the machine is enough to find zero, ship, change, and purchase operations. When the 1 yuan coin in the machine is not enough, you invest 10 yuan banknotes to buy 3 yuan or 5 yuan Drinks: When the machine is ready to be replaced, the 3 yuan drink will not be shipped, and it will be exchanged for 10 yuan; choose a 5 yuan drink, find a 5 yuan 1 yuan coin, and complete the purchase transaction. 　　 When the machine has not been set up to change Sell, choose 3 yuan of drinks, you buy 2 cans of drinks for you, find 4 yuan coins, choose 5 yuan to ship, buy 2 cans, can not find change, complete the purchase transaction. When 1 yuan coins are not enough, you can use 10 yuan bills to buy 3 yuan or 5 yuan drinks. 　　 When the machine is ready to be replaced, the 3 yuan 5 yuan drink is not shipped, and the 10 yuan bill is returned. When the machine is installed enough to sell, there will be a 5 yuan drink to be shipped, and you Will buy 2 cups of drinks for you. 3 yuan drinks are shipped, 3 cans are purchased, and the balance of 1 yuan is always displayed on the machine. Then you can put the money in, buy it, and complete the transaction. Previous: Automatic beverage vending machine : The vending machine has nothing to sell