TP-Link 3G 4G 无线N路由器 TL-MR3420 产品说明书 Features ：Description ：3G/4G Wireless N Router TL-MR3420 Specifications ：Blazing 4G speeds and backward compatible with 3G modems 3G/4G and WAN failover guarantees an ‘always-online’ Internet connection Wireless N speed up to 300Mbps for ...
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Are known patches that manage GPIO4 in Input mode, so it can somehow enable USB-Power switch. My doubts about that I wrote inhttps://dev.openwrt.org/ticket/13201#comment:18 In the original firmware source code found that USB-port powered GPIO4 in Output mode (USB_POWER_ON = "1"). ...