Smart piggy bank

This is the V3 of my smart piggybank.

It's home assistant compatible, and all the code can be found on my github : 
https://github.com/PaulBiod/smart-piggy-bank

At first, I want to say that the door mechanism was imported from the great design of Matthew Ghost => https://makerworld.com/en/models/671454-safe-mini-vault-money-bank-piggy-bank

I like his door lock and I used it for my project. Hope he is ok with this (of course I'll tell him)

Basically, this piggy bank allows you to have home assistant keep the count and show it on the screen, alexa can make announcement with generative AI when money is inserted/taked off.

The screen is a touchscreen which allow you to tell home assistant that you are taking off some money, and so, the count will always be accurate.

There is a buzzer that plays a melody when a coin is inserted, the coin values are enlightened with 8 leds, and when a coin is inserted, the led corresponding to the coin change color.

The print is easy, almost no supports, but may be a little big long, so don't be in a hurry !

The material used : 

• 8 x optocouplers
• 1 x passive buzzer
• 1 x 2.4 tft touchscreen
• 1x Esp32 S3
• some dupont cables and wago connexions

It's easy to see how parts assemble, you can check the pictures for help.

Here is a video of the smart piggybank : 

 For the door lock assembly, please refer to the owner of the door design : 
https://makerworld.com/en/models/671454-safe-mini-vault-money-bank-piggy-bank