Flash ESP8266-01 with Arduino Uno

Connect Arduino Uno and ESP8266 with a voltage divider

When I first got introduced to the world of the ESP8266, I had a real hard time to find a way to flash the firmware of the ESP8266-01 with an Arduino Uno. Many existing tutorials took essential information for granted or required additional hardware like a FTDI Serial TTL-232 USB cable, a USB-to-serial converter or a level shifter. Others were written specifically for breakout boards like the NodeMCU, SparkFun Thing or Adafruit Huzzah.

As I only had an Arduino and a barebone ESP8266-01 at my disposal, neither of these tutorials were viable. Eventually I managed to flash the ESP-01 firmware with pieces of information from Instructables, various blogs and youtube videos.

That’s why I wrote the missing step-by-step beginner tutorial on how to flash the ESP8266-01 firmware with an Arduino – it only requires an ESP8266, an Arduino, a USB cable and some wires to flash your ESP8266.

Continue reading “Flash ESP8266-01 with Arduino Uno”

Provide visual feedback using CSS #1

Small changes can cause big improvements. Todays topic is about small css improvements, resulting in visual feedback for your visitors and improvements to your blogs user interface. Most of the CSS below only works in the newest browsers, but it shouldn’t prevent you from using it.

Don’t just change the color of the link, provide feedback

Instead of just changing the color of your links, provide your websites’ visitors with visual feedback for their interaction.

Continue reading “Provide visual feedback using CSS #1”

Canonical URL’s, Optimized Permalinks

I updated my WordPress permalinks from an old-fashioned and quite outdated /%year%/%monthnum%/%day%/%postname%/ to the more optimized structure /%post_id%-%postname%/. Although I still like it if I can see the date and the entry title at a glance, the new structure has two advantages:

  1. the new permalink structure is in some cases faster because of the way wordpress stores the URL information in the database (see further: Efficient permalink strategies for WordPress)
  2. according to SEO’s, a link like cordobo.com/540-firefox-add-ons-for-developers/ is more likely to result in a better SERP position than (the same) link named cordobo.com/2008/09/30/firefox-add-ons-for-developers/

Continue reading “Canonical URL’s, Optimized Permalinks”