Add wifi capability to your ultrasonic cleaner by adding an ESP8266.

Parts required:

• Ultrasonic cleaner (more on that below);
• WeMos D1 mini (or any other board, you'll have to update the pinout);
• that's it.

The ultrasonic cleaner needed is sold under various brand but the main product code is 4820 with a capacity of 2500ml, some names are (and not limited to those): Yokkao, Floureon, Codyson or Harbor Freight. If your device look like that, then you're golden.

The code will allow you to manage your device and extend his capability:

• Turn ON or OFF the heater.
• Preset timing in minutes (1, 2, 3, 4, 5 then 10 minutes steps to 50).
• Preset timing in hours (from 1 to 10 hours).
• Custom timing from 1 minutes to 7 days
• Get the remaining time.
• Report Heater status.
• Emergency stop.
• Autocut off heater when the cycle is done.

Remember to change the SSID and PASSWORD to yours in the code.

The pinout are as follow: