[ https://github.com/knyin/passwordbook ]()
The total cost of a portable password book made using the esp8266 chip for the main controller is about 20 yuan. You can save your own secret account and password in the web page built by esp8266. If you are not connected to the Internet, you can only connect it yourself. The security bakl code is white Whoring an up owner's open source project passwordbook, wait until the homework is submitted before posting the code and uid
PCB drawingPCB soldering
See attached schematic and code
It is small and can be used to store batteries. Later, I will consider adding a coil for wireless charging and cancel the charging port to make the IPxx waterproof opening. It is suitable for a certain waterproof box. You can buy a waterproof box. If you need it, you can leave a message and I will reply.
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