I have the same problem. I also tried fgets() with the same result. Does anybody know the reason for that? This is the code: #include <stdio.h> #include "freeRTOS/freeRTOS.h" #include "FreeRTOS/task.h" #include "driver/gpio.h" #include "sdkconfig.h" #include "driver/uart.h" #define TX_PORT_NUM GPIO_...