Interface definition Interface definition of the whole machine AIO-1684XJD4 provides rich interfaces, including: 12V Power interface 2 x USB 3.0 2 x USB 2.0 2 x 1000Mbps Ethernet WIFI antenna HDMI 1.4 TF card slot SIM card slot FAN interface Power button Reset button Debugging serial port Industrial serial port (RS485, RS232, TTL) Mini PCIe interface (4G LTE) M.2 interface (5G Module) M.2 SATA interface (SATA3.0 SSD) The specific details are as follows: WiFi Antenna Connection Antenna Specifications: Stick Antenna 5dB; Flat Head 4G Module Antenna Connection Antenna Specifications: Stick Antenna 4GLTE-5dB; Round Head SIM Card Connection UART Pinout