ESP32: fgets() to read from Serial input does not wait for input - printf

Question

Using ESP-IDF and a ESP32S2 microcontroller, I want my program to wait for input using fgets(), then after pressing Enter printing my input using printf().
void app_main(void)
{
char command[64] = {};
printf("Welcome!\n");
fgets(command, sizeof(command), stdin);
printf("command: %s\n", command);
}
However, my output shows:
Welcome!
command:
I haven't got the chance to type anything, fgets() returns immediately with an empty string.
How can I wait for user input and Enter before continuing to printf()?
I've tried countless things found on StackOverflow and other platforms, including waiting using
while ( (c = getchar()) != EOF && c != '\n') { } and such, without succes.

Answer 1

I wrote this function to accept a string input from the serial monitor
mainly for esp32. Hope it helps you.
It'll wait till either an EOL character is detected (or) max length characters are input, a null terminator will also be inserted appropriately
void getLineInput(char buf[], size_t len)
{
memset(buf, 0, len);
fpurge(stdin); //clears any junk in stdin
char *bufp;
bufp = buf;
while(true)
{
vTaskDelay(100/portTICK_PERIOD_MS);
*bufp = getchar();
if(*bufp != '\0' && *bufp != 0xFF && *bufp != '\r') //ignores null input, 0xFF, CR in CRLF
{
//'enter' (EOL) handler
if(*bufp == '\n'){
*bufp = '\0';
break;
} //backspace handler
else if (*bufp == '\b'){
if(bufp-buf >= 1)
bufp--;
}
else{
//pointer to next character
bufp++;
}
}
//only accept len-1 characters, (len) character being null terminator.
if(bufp-buf > (len)-2){
bufp = buf + (len -1);
*bufp = '\0';
break;
}
}
}