Smart Tealight

📄 Description – Smart Tealight

This Smart Tealight is a compact DIY project powered by an ESP8266-01S.

The Smart Tealight runs on ESPHome and integrates seamlessly into Home Assistant, allowing easy control, automation, and future expansion within a smart home setup.

The model includes three different fitting versions for the lid. I personally used the tight fit, which worked perfectly on my printer.

The different fitting options only affect the lid and do not change the flame fit in any way.

If none of the provided fits work well on your printer, please let me know. I’m happy to create and upload a tighter or looser version if needed.

A separate cutout test piece is included, allowing you to check whether your flame insert fits correctly without printing the entire model.

🔧 Technical Details

• Controller: ESP8266-01S
• Power supply: 3,3 V
• Flame / LED:
  • Reused from an old store-bought LED tealight
  • Any other suitable LED can also be used

⚡ Wiring Notes

• GND of the power supply must be connected to both the ESP8266 and the LED
• 3,3 V (VCC) is connected only to the ESP8266
• The signal pin (GPIO0) of the ESP8266 is connected to the positive pin of the LED

🧠 ESPHome Firmware Notes

• The ESPHome configuration is provided as smart-tealight.txt
• The ESP8266 should be flashed with ESPHome before soldering
• After the initial flash, all future updates work wirelessly (OTA)

The provided code is included for completeness only.
In practice, you can simply append the following section to the automatically generated ESPHome file:

captive_portal:

output:
 - platform: esp8266_pwm
   id: led_output
   pin: 0            # GPIO0
   frequency: 1000 Hz

light:
 - platform: monochromatic
   name: "Tealight LED"
   output: led_output
   default_transition_length: 0.3s