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BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
文章源自：https://www.gandalf.site/2018/11/ble_23.html
参考低功耗蓝牙（BLE）安全初探
0x1 信道BLE的物理通道即“频道，分别是‘f=2402+k*2 MHz, k=0, … ,39’，带宽为2MHz”的40个RF Channel。
其中，有3个信道是advertising channel（广播通道）...
How to style dt and dd so they are on the same line?
..., grid layout enables an author to align elements into columns and rows.
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout
To change the column sizes, take a look at the grid-template-columns property.
dl {
display: grid;
grid-template-columns: max-content auto;
}
d...
How to sort mongodb with pymongo
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
No route matches “/users/sign_out” devise rails 3
...avascript file. Make sure you are using the latest version of jquery-ujs : https://github.com/rails/jquery-ujs and the last files available :
rails generate jquery:install
You should not have any more rails.js file. If you do, you're probably out-of-date.
Make sure also this file is loaded with d...
Postgresql - change the size of a varchar column to lower length
...ld worked for me, on redshift postgresql, refer this link for more details https://gist.github.com/mmasashi/7107430
BEGIN;
LOCK users;
ALTER TABLE users ADD COLUMN name_new varchar(512) DEFAULT NULL;
UPDATE users SET name_new = name;
ALTER TABLE users DROP name;
ALTER TABLE users RENAME name_new TO...
How to amend a commit without changing commit message (reusing the previous one)?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Heroku/GoDaddy: send naked domain to www [closed]
...is create a warning/error if your using SSL as heroku claims? they said if https:// example.com is redirected there is a warning.
– Jaqx
Jun 6 '13 at 7:04
...
TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
...pass transaction=True to the django_db decorator to avoid this error.
See https://pytest-django.readthedocs.io/en/latest/database.html#testing-transactions
Django itself has the TransactionTestCase which allows you to test
transactions and will flush the database between tests to isolate
th...
IntelliJ beginning of file keyboard shortcut
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
public static const in TypeScript
...'export' variable and 'import' in your class
export var GOOGLE_API_URL = 'https://www.googleapis.com/admin/directory/v1';
// default err string message
export var errStringMsg = 'Something went wrong';
Now use it as,
import appConstants = require('../core/AppSettings');
console.log(appConstants...