--- irmp.c.orig	2021-01-27 13:09:16.000000000 +0100
+++ irmp.c	2021-01-28 03:49:25.062008857 +0100
@@ -856,7 +856,7 @@ irmp_protocol_names[IRMP_N_PROTOCOLS + 1
 #  define  STM32_UART_COM     USART2
 #  define  STM32_UART_BAUD    115200                                    // 115200 Baud
 #  include "stm32f4xx_usart.h"
-#elif defined(ARM_STM32F10X)
+#elif defined(ARM_STM32F10X) || defined(ARM_STM32F30X)
 #  define  STM32_UART_COM     USART3                                    // UART3 on PB10
 #elif defined(ARDUINO)                                                  // Arduino Serial implementation
 #  if defined(USB_SERIAL)
@@ -999,6 +999,42 @@ irmp_uart_init (void)
     // UART enable
     USART_Cmd(STM32_UART_COM, ENABLE);
 
+#elif defined(ARM_STM32F30X)
+    GPIO_InitTypeDef GPIO_InitStructure;
+    USART_InitTypeDef USART_InitStructure;
+
+    // Clock enable vom TX Pin
+    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); // UART3 an PB10
+
+    // Clock enable der UART
+    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
+
+    // UART Alternative-Funktion mit dem IO-Pin verbinden
+    GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_7);
+
+    // UART als Alternative-Funktion mit PushPull
+    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+
+    // TX-Pin
+    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
+    GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+    // Oversampling
+    USART_OverSampling8Cmd(STM32_UART_COM, ENABLE);
+
+    // init baud rate, 8 data bits, 1 stop bit, no parity, no RTS+CTS
+    USART_InitStructure.USART_BaudRate = 115200;
+    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
+    USART_InitStructure.USART_StopBits = USART_StopBits_1;
+    USART_InitStructure.USART_Parity = USART_Parity_No;
+    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+    USART_InitStructure.USART_Mode = USART_Mode_Tx;
+    USART_Init(STM32_UART_COM, &USART_InitStructure);
+
+    // UART enable
+    USART_Cmd(STM32_UART_COM, ENABLE);
+
 #elif defined(ARDUINO)
     // we use the Arduino Serial Imlementation
     // you have to call Serial.begin(SER_BAUD); in Arduino setup() function
@@ -1049,7 +1085,7 @@ void
 irmp_uart_putc (unsigned char ch)
 {
 #ifndef UNIX_OR_WINDOWS
-#if defined(ARM_STM32F4XX) || defined(ARM_STM32F10X)
+#if defined(ARM_STM32F4XX) || defined(ARM_STM32F10X) || defined(ARM_STM32F30X)
     // warten bis altes Byte gesendet wurde
     while (USART_GetFlagStatus(STM32_UART_COM, USART_FLAG_TXE) == RESET)
     {