SeitanClock

NTP clock based on ESP 12F (ESP8266)

Features

• 7 segment RGB display. Also suports stock i2c LED displays with HT16K33 driver.
• Clock synchronization via NTP over Wi-Fi.
• Updates display intensity (and color) according to day and nigh time.
• Displays date and temperature.
• Easy to use configuration portal.
• Firmware update via Wi-Fi.

Setup mode

Clock enters setup mode at first boot (when no Wi-Fi configuration is present yet). To enter setup mode manually, power-cycle clock while pressing the button down. Display will show StP message. In setup mode clock acts as Wi-Fi hot-spot. There will be new Wi-Fi network SeitanClock-setup available. Connect to it with default password seitanclock. Point your browser to http://seitanclock-setup.local. Note, that Android phones seems to lack MDNS support, so in case you are using Android phone, point your browser to IP instead: http://192.168.4.1. Default username for portal is admin, password admin. Use setup portal to configure your clock. Save and reboot after.

Flash mode

Clock has a built-in feature to update its firmware via Wi-Fi. To get latest firmware:

• Get latest code release from https://github.com/Seitanas/SeitanClock
• Open it with Arduino IDE.
• Enter clock setup portal via http://seitanclock.local
• Push Enable flash mode button. Clock should display FLA message.
• Go to Arduino IDE -> Tools -> Port. Select SeitanClock-flash.local (or if you have changed clock host name, use YOURHOSTNAME-flash.local). You may need to wait for a moment for network port to appear. Note, that clock and computer you are running Arduino IDE must reside in the same network segment.
• Select Sketch -> Upload.
• Wait for upgrade to finish. Clock will restart automatically. Firmware upgrade leaves clock configuration intact.

Component list

• 1m WS2812B DC5V, 144 IP30 RGB LED tape.
• 1pc DS3231 RTC module.
• 1pc GL5506 LDR photosensitive resistor.
• 1pc ESP-12f module.
• 1pc 1.2K 1206 SMD resistor.
• 5pcs 10K 1206 SMD resistor.
• 1pcs AMS1117 (LM1117) 3.3 voltage regulator. SOT-223 package.
• 2pcs 47uF 0605 SMD electrolytic capacitor.
• 3pcs 2.54 mm pitch MOLEX 1x2 connector.
• 1pc 2.54 mm pitch MOLEX 1x3 connector.
• 1pc 2.54 mm pitch MOLEX 1x4 connector.
• 1pc 2.54 mm 1x4 female header.
• 1pc 6x6mm Square tactile switch.
• 1pc USB-C breakout board.

Electrical wiring diagram and PCB layout is done with CadSoft Eagle. You can find them in eagle folder. Each display segment contains 3xWS2812B LEDs. Dots contain 1 WS2812B LED. Assemble segments in order as displayed in img/segment_order.jpg file.
3D models can be found in stl folder. And also on:
Printables
Thingiverse