DOUBT:UART SERIAL RECEIVE

[Arjun_Bansal]

I'm trying to Receive a message "hello" from serial monitor and viewing it on Live expression,but message is not coming as word. It is coming as single letter- H E L L O.

char msg[20]="hello\r";

HAL_UART_Receive(&huart2,msg,sizeof(msg),1000);

i am using this code.

[Issamos · Accepted solution]

Hello @Arjun_Bansal 

This is normal because you are sending an array of char and you are going to receive an array of char (every char take a byte of this array). Use UART_transmit to review it on the same serial monitor and you will see the full string.

Best regards.

II

[KDJEM.1]

Hello @Arjun_Bansal and welcome to STCommunity :),

I advise you to take a look to these wikis:

• STM32StepByStep:Step3 Introduction to the UART - stm32mcu 
• Getting started with UART - stm32mcu

These articles explain what is UART and how to use it through examples

I hope this help you.

Kaouthar

[TDK]

"DDD" corresponds to what is in msg, so no issue there. No reason the code you posted can't work.

Show your actual code in the place it's being used.

[Arjun_Bansal]

I'm just getting started with it. Please let me know how to receive a string from serial monitor and see it as string on live expression. I MEAN HOW TO DECLARE A STRING.

[Issamos]

To receive a string, you are doing exactly what you have to do. The reception will stay in this form. To understand more, take a look at this video.

Strings are declared as an array of char.

Best regards.

II

[TDK]

> You can declare a string directly like this: 

> String a;

Huh? Maybe time to recalibrate the AI.

[Issamos]

No, no is just a typo not an AI Error. Thank you for your feedback.

Best regards.

II