Database read and write, serial send. Modify source code in the table structure can be realized ODBC database to read sent
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Serial Send Hydrological Data 串口发送水文数据
RFCOMM is better when you want to send and receive stream data (and when you'd like to take a traditional serial port application and Bluetooth-enable it).
如果想发送和接收流数据（而且想采用传统的串口应用程序，并给它加上蓝牙支持），那么 RFCOMM 更好。
However, RFCOMM is the better choice when you want to send and receive stream data, just like you would with a traditional serial port.
但是，如果想发送和接收流数据，则RFCOMM是更好的选择，就像使用传统的串口一样。
In this lab, you will design a program to send and receive serial data using interrupts.
在这个实验室，你会设计一个程序来发送和接收串行数据用中断。
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