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App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
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显示已配对的SPP经典蓝牙列表：
选择一个蓝牙设备进行连接：
断开当前连接的设备：
错误处理：
常见问题解决
Error 515: Not connected to a Bluetooth device. ...
How to check iOS version?
I want to check if the iOS version of the device is greater than 3.1.3
I tried things like:
37 Answers
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How do I activate a virtualenv inside PyCharm's terminal?
...t>.
I don't have the reputation to comment on the earlier response so posting this corrected version. This really saves a LOT of time.
Update:
Note: Pycharm now supports virtual environments directly and it seems to work well for me - so my workaround not needed anymore.
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How do I discover memory usage of my application in Android?
...() is our highest-level API for looking at overall memory usage. This is mostly there to help an application gauge how close the system is coming to having no more memory for background processes, thus needing to start killing needed processes like services. For pure Java applications, this should...
Where does Jenkins store configuration files for the jobs it runs?
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Whether its possible to get config.xml when we create jenkins job via pipeline method?
– Manigandan Thanigai Arasu
May 8 '19 at 9:02
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how to change default python version?
...even aware of which expect python=python2, and changing this would break those programs and scripts.
The answer you are probably looking for is You should not change this.
You could, however, make a custom alias in your shell. The way you do so depends on the shell, but perhaps you could do alias ...
How to send email attachments?
...ase explain how to send an attachment in an email. I know there are other posts online but as a Python beginner I find them hard to understand.
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Slow Requests on Local Flask Server
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Ok I figured it out. It appears to be an issue with Werkzeug and os's that support ipv6.
From the Werkzeug site http://werkzeug.pocoo.org/docs/serving/:
On operating systems that support ipv6 and have it configured such as modern Linux systems, OS X 10.4 or higher as well as Windows V...
How can I output the value of an enum class in C++11
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#include <iostream>
#include <type_traits>
using namespace std;
enum class A {
a = 1,
b = 69,
c= 666
};
std::ostream& operator << (std::ostream& os, const A& obj)
{
os << static_cast<std::...
How to sort with a lambda?
... What you have written so far makes little sense. If mProperty is supposed to be an int a.mProperty>b.mProperty will definitely yield a bool.
– sellibitze
Feb 26 '11 at 0:32
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