{"id":81038,"date":"2024-05-07T23:50:32","date_gmt":"2024-05-08T03:50:32","guid":{"rendered":"https:\/\/www.engineersgarage.com\/?p=81038"},"modified":"2024-08-21T22:23:32","modified_gmt":"2024-08-22T02:23:32","slug":"esp32-iot-analog-clock","status":"publish","type":"post","link":"https:\/\/www.engineersgarage.com\/esp32-iot-analog-clock\/","title":{"rendered":"How to make an IoT-based analog clock using ESP32"},"content":{"rendered":"

In this project, we\u2019ll design an analog display clock using ESP32. The clock is an Internet-of-Things (IoT) device that retrieves the local time from a Network Time Protocol (NPT) server and displays the time (as well as the date) like an analog clock. \u00a0<\/span><\/p>\n

The display used to build this IoT clock is SSD1306. However, any display module can be used, and the code can be altered to fit within the clock\u2019s dimensions.\u00a0<\/span><\/p>\n

Without letting any more time run out<\/span>, let\u2019s build an analog clock<\/span>.<\/span>\u00a0<\/span><\/p>\n

Components required\u00a0<\/span><\/strong><\/p>\n

    \n
  1. ESP32 x1<\/span><\/li>\n
  2. SSD1306 OLED x1<\/span><\/li>\n
  3. Connecting\/Dupont wires<\/span><\/li>\n<\/ol>\n

    Circuit connections
    \n<\/span><\/strong>To design the analog clock, we first must interface SSD1306 OLED with ESP32. The SSD1306 used in this project has a Serial Peripheral Interface (SPI) interface with the following pin diagram.\u00a0<\/span><\/p>\n

    \"\"<\/a><\/p>\n

    To interface the SSD1306 OLED with ESP32, follow the circuit connections as described in the below table.<\/p>\n

    \"\"<\/a><\/p>\n

    The circuit diagram of the IoT-based analog clock is represented in the below image.<\/p>\n

    \"\"<\/p>\n

    Arduino sketch
    \n<\/strong>After making circuit connections, upload the following sketch to ESP32. Remember to replace the SSID and Wi-Fi password in the sketch with your own. Also, you might need to adjust the time to the one in your time zone.<\/p>\n