AVR-ATMEGA32采用MODBus规约的RS232通信程序-ATMEGA32 MODBus code by AVR- the RS232 communication program

MDB协议接口售货机非现金支付测试工具，用于连接RS232-MDB适配器到自动售货机MDB接口，实现自助设备的移动支付。(MDB protocol interface vending machine cashless payment testing tool, used to connect RS232-MDB adapter to the vending machine MDB interface, to achieve mobile payment of self-service equip