Its servers and data centers are all around the world which helps it to select the nearest server and hence provides fastest connection in sending and receiving emails. Due to its fast and reliable service it is mostly used by developers and marketers to save their time in sending emails in a secured way. SMTP ( Simple Mail Transfer Protocol) is a platform used to send and receive large number of emails from remote locations automatically. In this project one IR sensor will be kept inside the medicine box to detect the opening and closing of the box. Generally IR receiver LED is darker (black) whereas transmitter is transparent in color. The receiver diode generates a voltage across its terminals which depend on the intensity of light reflected by the object. If these rays fall on some object then that object reflects back the IR rays which are received by the receiver photodiode. When a specific positive voltage is applied across the transmitter LED it transmits the IR rays. It detects infrared radiations which have wavelength from 700nm to 1mm. It mainly consists of a transmitter IR LED and a receiver photodiode. IR sensor is an electronic device which is used to detect objects by sensing infrared radiations reflected from the objects. The client sends request to NTP server and NTP server responds with data packet consisting timestamp and time zone related information. NTP works on client-server mode, where NTP is the server and requesting device like ESP8266-01 acts as client. NTP uses UTC as the time reference and provides accurate and synchronized time across the Internet. To synchronize computer clock times with extreme precision NTP uses Coordinated Universal Time, offering greater accuracy on smaller networks - down to a single millisecond in a local area network. NTP is very old networking Internet Protocol (IP) used for synchronization the time between systems and Data networks. During programming mode, GPIO0 PIN (Flash pin) is made grounded with the help of Jumper cap, and when left open it can be used as GPIO pin. Here a Reset button with pull up resistor is used to reset the Wi-Fi module and a jumper switch is used to switch the module in programmable mode. Check the detailed tutorial on how to program ESP-01 using FTDI module. This board can be used to program ESP8266 in future projects. ESP8266 is not breadboard friendly so here I have soldered all the components on a perf board as per above circuit diagram. You can also use USB to TTL converter to program it. It has 8 pins -Two UART Pins (RX and TX), two GPIO pins, one Reset and one CH_PD and two for 3.3 V and Ground.ĮSP8266-01 can be programmed in many ways but in this project we will be programming it with FTDI Serial Adapter Module. There is a range of Wi-Fi modules from ESP-01 to ESP-12 by Espressif Systems, but ESP-01 is very low cost and easily available in the market. This module help microcontrollers to get connect to the Wi-Fi Network using AT commands through UART communication. ESP8266-01 is a Wi-Fi module and has a onboard microcontroller manufactured by Espressif.
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