This version does not have soldered OLED screens. ^^ The built-in SX1276[915mhz] Lora chip facilitates the project to send and receive data over a long distance with low power consumption ^^ Onboard ESP32 MCU with WiFi BLE [v 4.2 ] transmission function, 4MB Flash and 8MB PSRAM, supporting daily entry-level programming ^^ Use 3D wifi antenna to save spacewe also reserved IPEX antenna base for use. [Note that the onboard antenna and external antenna can't be used together ^^ The CH9102 serial port programming chip is convenient for daily programming. Before connecting, you need to pay attention to ensure that the driver has been installed on the compute