Description:The GT1001 is used together with the expansion board, and the three serial communication modes of RS-232/RS-485/USB-UART can be conveniently realized through the jumper modePacking List:GT1001 Ethernet to TTL Module*1PCS GT1001-TEST-Board*1pcsDC5V power supply*1PCSMicoUSB cable*1PCSnetwork cable*1PCSSmall straight screwdriver*1PCS