Output interface definition : VCC / GND / TXD / RXD
VCC: the + external power supply , such as external devices TTL communication ports can provide 3.3V-5.2V power supply, can be connected directly to use . If you use another regulated power supply , set the power of the " + " pole connected to VCC, the power of the " - " pole connected to GND). Do not reversed, otherwise it will burn chip on board ;
GND: TTL signals , the use of external devices connected to a TTL signal ground ;
TXD: 232 side TTL level transmission signal output terminal connected to an external device when using a TTL signal transmission terminal;
RXD: 232 side accepts TTL level signal input for connecting external devices when using a TTL signal receiving end ;
no driver connection can use , without stealing functionality required from an external 3.3V-5V power supply pins . The power indicator plate .
Development resources: Driver, Software etc..
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