ESP32-based smartwatch verification board

The project has been verified. The overall design is based on https://oshwhub.com/eedadada/chappie2 . The USB switching circuit has been modified to support switching the USB-C function via a switch. The onboard USB to serial port facilitates debugging.
This is my first time designing a board. Compared to the reference project, it has reduced the difficulty to a certain extent. After this board is successfully verified, we will consider the subsequent improvement plan . [ ] Change the power management to AXP2101 [ ] Add a vibration motor [ ] Modify the board shape and circuit to make it more suitable for watches [ ] Add a MAX30102 heart rate sensor. The software is based on ESP-IDF. Developed using v5.3, code details can be found at https://gitee.com/liu-lejian/kotone-watch. The sensor I2C driver is based on the new i2c_master.h header file of ESP-IDF and does not support older versions of the ESP-IDF i2c.h header file. The USB switching circuit can switch between ESP-USB and UART-USB, but hot-switching is not supported; the Type-C port needs to be unplugged and plugged back in for the switch to take effect. It uses many surface-mount components; replication is not recommended without a heating platform/hot air gun.