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There is an almost limitless fountain of information available for the ESP8266, all of which has been provided by amazing community support. In the Documents section below you will find many resources to aid you in using the ESP8266, even instructions on how to transforming this module into an IoT (Internet of Things) solution!
Note: The ESP8266 Module is not capable of 5-3V logic shifting and will require an external Logic Level Converter. Please do not power it directly from your 5V dev board.
Note: This new version of the ESP8266 WiFi Module has increased the flash disk size from 512k to 1MB.
In this tutorial, we’ll use a seeeduino to control the ESP8266 WiFi module to request a static page from the internet. This is a basic use of TCP socket, for other usage, please refer to the AT command guide of the module.
Note： We used a software serial to print some debugging information as there’s only one hardware serial on seeeduino board. But the limitation of software serial is that it can’t communicate in a higher baud rate than 19200. So part of the output from ESP module will be dropped because the baud rate 57600 of ESP module is higher than that of the software serial. If you have a board with more than one hardware serial (e.g. Arduino Mega 2560), the case will be easier.
Arduino Basic Wifi Project using ESP8266 wifi module
Open Serial Monitor and press the reset button of board, you’ll see the output.
Note: If you don’t know what is an ESP8266 Module I recommend you to read a complete review and tutorial here and then come back.
Before knowing how accurate an NTP server can be you need to know its architecture. A NTP server is is a hierarchical, semi-layered system of levels of clocks. See below NTP strata levels :
There are many factors that can affect the accuracy of time synchronized by NTP. A visible influence can have the following:
Note: To have a better accuracy is recommended to choose servers that are physically close to your exit point (internet provider end point). This will lessen the chance that the signal is not routed up to a geostationary satellite. Public server examples:
Typically, the URL will be something like x.asia.pool.ntp.org where x = 0,1,2 or 3.
Arduino based Multicolor lightpainting wand - 6:25.