请确保AT24C02的VCC和GND正确连接，并且SCL和SDA引脚已通过外部上拉电阻连接到VCC（通常为4.7kΩ）。
Sharath N25 has published a great tutorial to the Instructables website providing the full tutorial on how to build your very own basic mobile phone using the STM32F407 Discovery Kit and a GSM A6 ...
Abstract: The paper aims to design a pocket-sized teaching development board based on the STM32F407 microcontroller. This research first analyzed the necessity of development. The development board ...
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