Dear forum members,
I will communicate using USART STM32F051R8 with ESP WROOM-02.
I sending "AT\r\n", but the response is not "OK". The oscilloscope shows rx & tx 3 volts square wave. What would be the reason ?
Thanks for comments.
The schematic is designed for the STM32L011D3, but the pull-up and pull-down connections are also valid for the STM32F051R8.
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