Fitting of MCU and bluetooth module, use the serial port assistant test mobile phone can be displayed to the serial port to send digital and English assistant, Chinese characters is garbled, I use a serial port communication method to send and receive but single-chip computer doesn't show any signs of data transmission, hope give me advice,

CodePudding user response:

The baud rate is wrong, TXDRXD backwards, and so on

CodePudding user response:

I've just done a bluetooth car, I think the baud rate is the most easy to get wrong, want oneself to calculate by crystals

CodePudding user response:

Crystals of the percentage error is greater than 7 words will appear garbled, for example if the 51 single-chip microcomputer with 12 MHZ crystal vibration, greater than 4800 baud rate is not