Convert Float in to String in C

There is a very useful function called dtostrf() which will convert Float in to String

The syntax is 

LED current limiting resistor calculation

To calculate resistor value needed for a simple led circuit use ohms law


R=Vcc−VfIf

Rubiks cube

Programming Arduino mini pro using USB to TTL converter

Here in this post i'm going to tell you how to program your arduino mini pro using a USB to TTL converter.

Requires:

1.USB to TTL converter( I used D-SUN)
2.Arduino mini pro
3.Connecting wires

Connect ESP8266 to internet(Hotspot) using AT commands

 If your hardware setup is not ready then see my post ESP8266 hardware setup

Now you are ready to send your first Command!
.
The updated firmware versions require Carriage-Return-and-New-Line line endings and
there appears to be no way to configure screen to send both with one key press. Instead, you need
to press <enter> or Ctrl-M then follow that with Ctrl-J.

1. Open your Hyper terminal

2.Configure Hyper terminal

Update the Firmware in Your ESP8266 Wi-Fi Module

 ESP8266 is low cost WiFi module suitable for adding WiFi functionality to an
existing microcontroller project via a UART serial connection. The module can even be reprogrammed to act as a standalone WiFi connected device–just add power. Here this tutorial will help you to update the firmware of your ESP8266.