Making a UART frame from ADC value WITH ASCII Control Character

[jlecl.1]

Hello,

My aim is to send (from my nucleo board_F103+FTDI) somes ADC value from DMA.

Easy...

But i would like a frame like that (Windows Software need it):

<STX>ADC1;ADC2;ADC3<ETX><CR><LF>

I'm able to send data, no more...

uint16_t sensor_B =1234;
char str[10];
 
sprintf(str, "%u\r\n", sensor_B);
HAL_UART_Transmit_DMA(&huart1, (uint8_t*)str, strlen(str));

Do you know the simplest way to do that ?

[Tesla DeLorean · Accepted solution]

sprintf returns a string length

char str[64];

HAL_UART_Transmit_DMA(&huart1, (uint8_t*)str, sprintf(str, "\x02%u;%u;%u\x03\r\n", sensor_A, sensor_B, sensor_C));

[jlecl.1]

Definitely, you saved my day.

my brain is no longer available...:>