走马观花

m.2 STM32+ESP32 IoT minimum system board

Overview

1. esp32-c3 is used to access the API of the Internet of Things platform and lvgl screen refresh, and stm32 is used for data collection and driving.
2. The wch-link is integrated on the board to facilitate stm32 programming and debugging. The wch-link firmware can be programmed through the pin holes on the board. For details, please refer to the wch-link user manual.
3. Since CH340K is ridiculously expensive, the cheaper ch9340k is used for the programming part of ESP32.
4. The STM32 main control is switched to STM32F402RCT6, which is cheaper and pin to pin compatible.
5. DRC error reporting is a normal phenomenon. 56 of them are due to the m.2 interface and can be ignored.
6. There is a rather strange problem. After occasionally re-laying the copper, the USB differential pairing will report a drc spacing error. After re-laying the copper, the error disappears. I don’t know if it is a bug.
6. The PCB proofing thickness is set to 0.8mm, and everything else is as usual.
7. The function has not yet been verified. PCB novices are getting started. Criticisms and corrections are welcome. ![untitled.19.jpg]

![untitled.20.jpg]

Design Files

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Update:2025-05-09 13:47:59

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