1315_Use the LOOPBACK simulation mode to test whether the pyserial installation is successful

All learning summary: GreyZhang/g_serial: Some serial learning notes which may be usefull in embedded system debugging. (github.com)

I tried the installation of pyserial and the generation of documents before. This time I found a way to test whether the package was successfully installed.

The working way of pyserial I found two kinds from the document, one is to use the physical real serial port to communicate directly, and the other is the simulation mode.

There is such a chapter in the documentation, in fact, there are some corresponding instructions here.

I mainly read the loop:// URL here, and after reading it, I found that this is actually a simulated behavior.For this, in fact, you can do a functional test of a basic software package, without the need for an actual serial port physical device.At first, I may have misunderstood and thought that LOOP may be related to loops. In fact, this is the abbreviation of LOOPBACK.

In another place in the document, there is an example of reading by line, which uses the above URL.In fact, this example can be used directly as a test example for a simple module test.Next, transcribe the code to do a test.

An error occurred in my test environment, I tried to make some changes to the code.

Remove this part directly.After that, the effect of the test:

The test passed, but this actually means that there is no interactive information of the serial port.In fact, I can try to modify the above content again to see how the serial port information can be obtained.

This is the modified code and the effect of running. The interactive information of the serial port can be seen initially.However, this test feels that the execution speed is not very fast in my test environment, and the reason for this has not been found for the time being.