UART ESP8266 and STM32 - c

Question

Hello Im trying to connect a ESP8266 to a STM32 via UART.
I want to use the STM32 to send AT commands to the ESP, so that the ESP can do HTTP GET requests.
The code down here works when I use my PC to send data via FTDI to the STM, then the interrupt is called everytime a byte is recieved.
But when i hook up the ESP8266 I don't get a response even thought im sending AT\r\n;
Also i just connected everything like so:
SMT32 Tx -- ESP Rx
ESP Tx -- FTDI Rx
And I sended the AT\r\n command from the SMT to the ESP and on my pc in putty I got the OK command back, so the ESP is responding. But the interrupt is not called.
#include "main.h"
#include "usb_device.h"
#include "usbd_cdc_if.h"
UART_HandleTypeDef huart1;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
char Rx_Byte[1]; // Creating a single byte buffer
uint8_t Rx_Buffer[256]; // Full buffer
uint8_t Rx_Buffer_Index = 0;
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){
HAL_UART_Receive_IT(&huart1, (uint8_t *)Rx_Byte, 1);
memcpy(Rx_Buffer + Rx_Buffer_Index, Rx_Byte, 1);
Rx_Buffer_Index++;
if (*Rx_Byte == '\r' || *Rx_Byte == '\n') {
// I could send data via putty and FTDI, and when enter was pressed it printed the data in the buffer back to you via uart
// HAL_UART_Transmit(&huart1, (uint8_t *) Rx_Buffer, Rx_Buffer_Index, 1000);
memset(Rx_Buffer, 0, sizeof(Rx_Buffer)); // Clear buffer
Rx_Buffer_Index = 0;
}
}
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_USB_DEVICE_Init();
char echo_off[] = "ATE0\r\n";
char data[] = "AT\r\n";
HAL_Delay(1000);
HAL_UART_Transmit(&huart1, (uint8_t*)echo_off, sizeof(echo_off), 10);
while (1)
{
HAL_GPIO_TogglePin(GPIOA, LED_1_Pin);
HAL_UART_Transmit(&huart1, (uint8_t*)data, sizeof(data), 1000);
HAL_Delay(500);
}
}