diff --git a/.gitignore b/.gitignore
index 082d17a..ac00791 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 bin/
 
 GitVersion\.h
+
+STM32F10X_Lib/
diff --git a/Config.h b/Config.h
index 3fdec76..79902fd 100644
--- a/Config.h
+++ b/Config.h
@@ -58,8 +58,10 @@
 // Send RSSI value:
 // #define SEND_RSSI_DATA
 
-// Enable Nextion LCD serial port repeater:
+// Enable Nextion LCD serial port repeater on USART2:
 // #define SERIAL_REPEATER
+// Enable Nextion LCD serial port repeater on USART1 (not compatible with ZUM-Spot Libre or STM32_USART1_HOST):
+// #define SERIAL_REPEATER_USART1
 
 // Enable P25 Wide modulation
 // #define ENABLE_P25_WIDE
diff --git a/IOArduino.cpp b/IOArduino.cpp
index a74a324..4be1dc3 100644
--- a/IOArduino.cpp
+++ b/IOArduino.cpp
@@ -85,7 +85,7 @@
 #define PIN_COS_LED    PB15
 
 #else
-#error "Either PI_HAT_7021_REV_02, PI_HAT_7021_REV_03, or ADF7021_CARRIER_BOARD need to be defined"
+#error "Either PI_HAT_7021_REV_02, PI_HAT_7021_REV_03 or ADF7021_CARRIER_BOARD need to be defined"
 #endif
 
 #elif defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
diff --git a/IOSTM.cpp b/IOSTM.cpp
index 7abfb33..90b2c85 100644
--- a/IOSTM.cpp
+++ b/IOSTM.cpp
@@ -197,7 +197,7 @@
 #define PORT_COS_LED         GPIOB
 
 #else
-#error "Either PI_HAT_7021_REV_02, PI_HAT_7021_REV_03, or ADF7021_CARRIER_BOARD need to be defined"
+#error "Either PI_HAT_7021_REV_02, PI_HAT_7021_REV_03 or ADF7021_CARRIER_BOARD need to be defined"
 #endif
 
 extern "C" {
diff --git a/SerialSTM.cpp b/SerialSTM.cpp
index e02ea81..9397299 100644
--- a/SerialSTM.cpp
+++ b/SerialSTM.cpp
@@ -44,7 +44,7 @@ USART2 - TXD PA2  - RXD PA3
 #define TX_SERIAL_FIFO_SIZE 256U
 #define RX_SERIAL_FIFO_SIZE 256U
 
-#if defined(STM32_USART1_HOST)
+#if defined(STM32_USART1_HOST) || defined(SERIAL_REPEATER_USART1)
 
 extern "C" {
   void USART1_IRQHandler();
@@ -443,6 +443,10 @@ void CSerialPort::beginInt(uint8_t n, int speed)
     case 3U:
       InitUSART2(speed);
       break;
+    #elif defined(SERIAL_REPEATER_USART1)
+    case 3U:
+      InitUSART1(speed);
+      break;
     #endif
     default:
       break;
@@ -461,6 +465,9 @@ int CSerialPort::availableInt(uint8_t n)
     #if defined(SERIAL_REPEATER)
     case 3U: 
       return AvailUSART2();
+    #elif defined(SERIAL_REPEATER_USART1)
+    case 3U: 
+      return AvailUSART1();
     #endif
     default:
       return 0;
@@ -479,6 +486,9 @@ uint8_t CSerialPort::readInt(uint8_t n)
     #if defined(SERIAL_REPEATER)
     case 3U:
       return ReadUSART2();
+    #elif defined(SERIAL_REPEATER_USART1)
+    case 3U:
+      return ReadUSART1();
     #endif
     default:
       return 0U;
@@ -505,6 +515,12 @@ void CSerialPort::writeInt(uint8_t n, const uint8_t* data, uint16_t length, bool
       if (flush)
         TXSerialFlush2();
       break;
+    #elif defined(SERIAL_REPEATER_USART1)
+    case 3U:
+      WriteUSART1(data, length);
+      if (flush)
+        TXSerialFlush1();
+      break;
     #endif
     default:
       break;