diff --git a/SerialPorts.c b/SerialPorts.c
index 8846291..ed9c9c1 100644
--- a/SerialPorts.c
+++ b/SerialPorts.c
@@ -502,7 +502,11 @@ void SerialPorts_Init(tRs485DirectionPins *directionPins) {
     env->cliVirtualInIo = SerialPortP2p_GetIoFirst(&env->cliVirtualPort);
     env->cliVirtualOutIo = SerialPortP2p_GetIoSecond(&env->cliVirtualPort);
 
-    SerialPortUsb_Init(&env->SerialPortUsb, 1024, 1024);
-    env->SerialPortUsbIO = SerialPortUsb_GetIo(&env->SerialPortUsb);
-    env->SerialPortUsbSnifferIO = SerialPortUsb_GetSnifferIo(&env->SerialPortUsb);
+    SerialPortUsb_Init(&env->SerialPortUsb1, 1, 1024, 1024);
+    env->SerialPortUsb1IO = SerialPortUsb_GetIo(&env->SerialPortUsb1);
+    env->SerialPortUsb1SnifferIO = SerialPortUsb_GetSnifferIo(&env->SerialPortUsb1);
+
+    SerialPortUsb_Init(&env->SerialPortUsb2, 2, 1024, 1024);
+    env->SerialPortUsb2IO = SerialPortUsb_GetIo(&env->SerialPortUsb2);
+    env->SerialPortUsb2SnifferIO = SerialPortUsb_GetSnifferIo(&env->SerialPortUsb2);
 }
\ No newline at end of file
diff --git a/SerialPorts.h b/SerialPorts.h
index 1806d06..2a7c91a 100644
--- a/SerialPorts.h
+++ b/SerialPorts.h
@@ -41,9 +41,13 @@ typedef struct {
     tSerialPortIO cliVirtualInIo;
     tSerialPortIO cliVirtualOutIo;
 
-    tSerialPortUsbArtery SerialPortUsb;
-    tSerialPortIO SerialPortUsbIO;
-    tSerialPortIO SerialPortUsbSnifferIO;
+    tSerialPortUsbArtery SerialPortUsb1;
+    tSerialPortIO SerialPortUsb1IO;
+    tSerialPortIO SerialPortUsb1SnifferIO;
+
+    tSerialPortUsbArtery SerialPortUsb2;
+    tSerialPortIO SerialPortUsb2IO;
+    tSerialPortIO SerialPortUsb2SnifferIO;
 
 } tSerialPorts;