Module operating voltage：5-12V。 

       The serial port of MCU can be used to connect with the serial port of module（RXD TXDoverlapping），It can also be usedUSBturnTTLmodular

      The above related command operation and instructions。

link：//pan.baidu.com/s/1Na4cvs88b73v1lKyFmvOvw  Extraction code：lgzz  After copying this content, open Baidu net disk mobile phoneApp，The operation is more convenient

be careful：The module does not contain transmit antenna and source code、Schematic data。