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APP INVENTOR硬件交互学习教程04——蓝牙控制继电器 - 创客硬件开发 - 清泛...
这节主要是设计一个APP，连接蓝牙模块，通过按钮控制继电器的打开和关闭。
一、硬件部分
二、板子程序
串口接收字符，并输出控制继电器
// 引脚定义
const int ledPin1 =  5;// the number of the LED pin
const int ledPin2 = &...
AsciiConversion 拓展问题：字母开头的会出现“C2”非预期字符 - App Inven...
...以实现：UrsAI2ByteArray 字节数组扩展：读写二进制数据 - App Inventor 2 拓展
2、字符串模式下，使用Ascii拓展将二进制列表转换成字符串再发送，当二进制为0~127时，能够正常转换发送并还原二进制值，但是 >127的二进制还原后前...
IIS: Idle Timeout vs Recycle
...
Idle Timeout is if no action has been asked from your web app, it the process will drop and release everything from memory
Recycle is a forced action on the application where your processed is closed and started again, for memory leaking purposes and system health
The negative imp...
Do I need to disable NSLog before release Application?
When releasing an app for iPhone, if I disable NSLog(); will it perform better?
12 Answers
...
Is it possible to display inline images from html in an Android TextView?
...ously. If you can add any images you want to display as resources in your application the your ImageGetter implementation becomes a lot simpler. You could get away with something like:
private class ImageGetter implements Html.ImageGetter {
public Drawable getDrawable(String source) {
...
Django, creating a custom 500/404 error page
...unctional views are defined, like so:
# project/urls.py
handler404 = 'my_app.views.handler404'
handler500 = 'my_app.views.handler500'
Update for Django 2.0
Signatures for handler views were changed in Django 2.0:
https://docs.djangoproject.com/en/2.0/ref/views/#error-views
If you use views as...
Facebook Graph API, how to get users email?
...cebook.com/docs/php/gettingstarted/5.0.0
$fb = new Facebook\Facebook([
'app_id' => '{app-id}',
'app_secret' => '{app-secret}',
'default_graph_version' => 'v2.4',
]);
$fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
$response = $fb->get('/me?locale=en_US&fiel...
Sync data between Android App and webserver [closed]
I want to sync data (such as db record, media) between an Android App and a Server. If you've seen Evernote or similar Applications, you certainly understand what I mean.
...
Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet
...andlers.wsgi import WSGIHandler
os.environ['DJANGO_SETTINGS_MODULE'] = 'myapp.settings'
application = WSGIHandler()
When I updated to the 1.7 style WSGI handler:
import os
from django.core.wsgi import get_wsgi_application
os.environ['DJANGO_SETTINGS_MODULE'] = 'myapp.settings'
application = ge...
How can I send mail from an iPhone application
I want to send an email from my iPhone application. I have heard that the iOS SDK doesn't have an email API. I don't want to use the following code because it will exit my application:
...