Over-Engineered Clock Uses No Less Than Five ESP32s

When [Proto G] enters into an Instructables contest whose only requirement is for the project to be wireless; he does so with style. Let’s put aside for a minute that he’s using a separate ESP32 board for each of the clock’s characters – that’s one for the hour, then one for the colon, one for the minutes and other colon and then the seconds. If you’re keeping count, that’s FIVE ESP32s. But like we said… put that aside and take into account that he’s using three different wireless communication protocols to make the five ESP32s get cozy with one another:

  1. His phone is connected to a cell tower.
  2. One of the ESP is connected to his phone to get the time.
  3. Two other ESPs connect to his phone and send minutes and seconds info to two more ESPs via the board’s internal communication protocol – ESPNOW

In case you’re wondering; the boards he’s using each have an OLED, battery, USB-to-serial converter and of course the ESP32. [Proto G] felt he could add some more complication to his project by crushing the programming connector on one of the boards with his chair. He had to break out the soldering iron and some jumper wire to make a quick but effective repair.

Be sure to check out his Instructables page for more great projects!

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