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TUMPA serial 3.3v support?
zoomx
Can the TUMPA serial port be connected to 3.3v serial ports that are in some routers?
[deleted]
yes, you need to select TTL level using Selection Jumpers;
http://www.tiaowiki.com/w/TIAO_USB_Multi_Protocol_Adapter_User%27s_Manual#Serial_RS232.2FTTL_level_Selection_Jumper