STM32F407 UART ESP322

[noname8888]

hi all,

i am trying to use the esp322's TX and RX pins to transmit a string from the STM32F407 and display it to the Hercules. The problem I still have is that it cannot send even though I have selected the correct COM port and Baud-rate

many thank.

[Pavel A.]

1. The diagram does not show where/how the hercules is connected.

2. In the code snippet, line 99: 12 is the number of characters to send. but it is invalid. Likely you've forgotten \r\n.

 

 

[noname8888]

I added \n but still not sending

[Tesla DeLorean]

Check signals with a scope or logic analyzer

Make sure HSE_VALUE reflects that of your board, so the baud rates of the two MCU match.