From bd44f041e82ac7aaf83cdba4fbb6d5fe17c46d47 Mon Sep 17 00:00:00 2001
From: Gurmeet Athwal <gurmeet.athwal@gmail.com>
Date: Wed, 11 Mar 2020 06:43:59 +0530
Subject: [PATCH] M220 print FR percentage (#17101)

---
 Marlin/src/gcode/config/M220.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Marlin/src/gcode/config/M220.cpp b/Marlin/src/gcode/config/M220.cpp
index e09a5f753..5ea75c09c 100644
--- a/Marlin/src/gcode/config/M220.cpp
+++ b/Marlin/src/gcode/config/M220.cpp
@@ -29,6 +29,8 @@
  * Parameters
  *   S<percent> : Set the feed rate percentage factor
  *
+ * Report the current speed percentage factor if no parameter is specified
+ * 
  * With PRUSA_MMU2...
  *   B : Flag to back up the current factor
  *   R : Flag to restore the last-saved factor
@@ -43,4 +45,9 @@ void GcodeSuite::M220() {
 
   if (parser.seenval('S')) feedrate_percentage = parser.value_int();
 
+  if (!parser.seen_any()) {
+    SERIAL_ECHOPAIR("FR:", feedrate_percentage);
+    SERIAL_CHAR('%');
+    SERIAL_EOL();
+  }
 }