One LED WIFI Clock

One LED clock. Using Network time protocol.

I have made a little and simple clock. It tells you the time by flashing LED.

This method is used in the automotive industry and house appliances as indicating error codes.

Working principle is simple, count number of flashing, first group is hours, next is tens of minutes, last one is ones of minutes.It gets the time information from NTP server.

There are breaks between the groups. The "0" is special, that is a longer blink.

ESP12 (F or E)

2 pcs 10k resistors

some wire

3.3V

I found a very good description for uploading code : https://circuitjournal.com/esp8266-with-arduino-ide

I used a NODEMCU board for uploading code.

This URL has to be added to board manager.http://arduino.esp8266.com/stable/package_esp8266com_index.json

The board needs 3.3V power supply. Be careful, 5V kills the module.