A minimal table to compare the Espressif's MCU families.
ESP8266 | ESP32 | ESP32-S2 | ESP32-S3 | ESP32-C3 | ESP32-C6 | |
---|---|---|---|---|---|---|
Announcement Date | 2014, August | 2016, September | 2019, September | 2020, December |
package com.sam016.vsflatomation.service.ble; | |
import java.util.HashMap; | |
import java.util.UUID; | |
public class AllGattCharacteristics { | |
private static HashMap<String, String> attributes = new HashMap(); | |
static { | |
attributes.put("00002a00-0000-1000-8000-00805f9b34fb", "Device Name"); |
The DC Metro lines map drawn in SVG and animated with SVG Line Animation. Inspired by https://css-tricks.com/svg-line-animation-works/ and https://codepen.io/juliangarnier/pen/ZeEpgd
A Pen by Michael Gilbertson on CodePen.
/* | |
Serve is a very simple static file server in go | |
Usage: | |
-p="8100": port to serve on | |
-d=".": the directory of static files to host | |
Navigating to http://localhost:8100 will display the index.html or directory | |
listing file. | |
*/ | |
package main |
When hosting our web applications, we often have one public IP
address (i.e., an IP address visible to the outside world)
using which we want to host multiple web apps. For example, one
may wants to host three different web apps respectively for
example1.com
, example2.com
, and example1.com/images
on
the same machine using a single IP address.
How can we do that? Well, the good news is Internet browsers
There is a long standing issue in Ruby where the net/http library by default does not check the validity of an SSL certificate during a TLS handshake. Rather than deal with the underlying problem (a missing certificate authority, a self-signed certificate, etc.) one tends to see bad hacks everywhere. This can lead to problems down the road.
From what I can see the OpenSSL library that Rails Installer delivers has no certificate authorities defined. So, let's go fetch some from the curl website. And since this is for ruby, why don't we download and install the file with a ruby script?
package main | |
import ( | |
"log" | |
"net/mail" | |
"encoding/base64" | |
"net/smtp" | |
"fmt" | |
"strings" |
class Api::RegistrationsController < Api::BaseController | |
respond_to :json | |
def create | |
user = User.new(params[:user]) | |
if user.save | |
render :json=> user.as_json(:auth_token=>user.authentication_token, :email=>user.email), :status=>201 | |
return | |
else |
<!DOCTYPE html> | |
<html> | |
<head> | |
<title>Leaflet Custom Simple Map Example</title> | |
<meta charset="utf-8" /> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-1.0.0-b1/leaflet.css" /> | |
<link rel="stylesheet" href="https://cdn.rawgit.com/ardhi/Leaflet.MousePosition/master/src/L.Control.MousePosition.css"> |
<!DOCTYPE html> | |
<html> | |
<head> | |
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"> | |
</script> | |
<meta charset='utf-8' /> | |
<title> | |
infinite loop carousel(horizontal) | |
</title> |