[NS : lemo] 手搓大疆4G模块

之前本来想自己画板子手搓的结果我在oshwhub看到这个 https://oshwhub.com/86pad/ec20_usb_dongle ?jspm=hub.ss.lb.gc2&jlc_vid=QFZXVlAEEVIMU1JfTlBcAl0AQFNYUQJVE1UMUgBTEgAxVlNeQVZcUFBRR