Can't Recieve/Send data to hc-06
my code at below. i can connect succesfull but i cant send any command (like on,off) . what is wrong? help me pls#include "main.h" #include "main.h" #include "stm32f4xx_hal.h" #include "stm32f4xx_hal_uart.h" #include "stm32f4xx_hal_usart.h" #include ...