diff --git a/firmware/drivers/serial.c b/firmware/drivers/serial.c
index 0fab570fdc..70f395bc32 100644
--- a/firmware/drivers/serial.c
+++ b/firmware/drivers/serial.c
@@ -52,3 +52,11 @@ void serial_tx(const unsigned char * buf)
         }
     }
 }
+
+void serial_tx_raw(const unsigned char * buf, int len)
+{
+    for (int i = 0; i < len; i++) {
+        while (!tx_rdy());
+        tx_writec(buf[i]);
+    }
+}
\ No newline at end of file
diff --git a/firmware/export/serial.h b/firmware/export/serial.h
index 8a4780c3f1..3ca0ce08a8 100644
--- a/firmware/export/serial.h
+++ b/firmware/export/serial.h
@@ -25,7 +25,8 @@
 extern void serial_setup(void);
 extern void serial_bitrate(int rate);
 extern int remote_control_rx(void);
-extern void serial_tx(const unsigned char *buf);
+extern void serial_tx(const unsigned char * buf);
+extern void serial_tx_raw(const unsigned char *buf, int len);
 extern void tx_writec(unsigned char c);
 extern int tx_rdy(void);