The hardware implementation of a seven-segment digital clock, synchronized to the network time using SNTP ; this particular implementation targets an ESP32 based development board known as WEMOS Lolin32 lite, that as been programmed using the esp32 based firmware.

This is published under CC0 license.

The board project is here : https://github.com/sporniket/the-clock--main-pcb-esp32--lolin32-lite

The firmware project is there : https://github.com/sporniket/the-clock--firmware-esp32-idf

Wifi connection will require a wifi router with WPS push button.

Assembly manual

Top side

Place and solder in this order

• resistors
• photodiode
• 1*4 header ; it may help to use the display module equipped with standoffs and its male 1*4 pins header to maintain correct verticality when soldering.
• push buttons

Bottom side

Place and solder in this order

• 1*13 headers ; it may help to use the ESP32 board with its two 1*13 pins headers to maintain correct verticality when soldering.

Operation manual

With the firmware build and loaded.

First power-on

• stay near your Wifi router and push the WPS button
• power the clock
• it should connect to the wifi, and after the greetings message, it should show the time (Paris time)

Other power-on

• put the clock where you want (that reaches your wifi network)
• power the clock.
• it should connect to your wifi network that has been memorized previously.