From 04b0a8a62a65c4cfec7e899f5872315c1df8e8ef Mon Sep 17 00:00:00 2001
From: murata <ma2maru@gmail.com>
Date: Sun, 23 Dec 2018 18:37:34 +0900
Subject: [PATCH] Copter: Add expected value to message

---
 ArduCopter/AP_Arming.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ArduCopter/AP_Arming.cpp b/ArduCopter/AP_Arming.cpp
index 26ca4224e6..54be081954 100644
--- a/ArduCopter/AP_Arming.cpp
+++ b/ArduCopter/AP_Arming.cpp
@@ -487,8 +487,9 @@ bool AP_Arming_Copter::proximity_checks(bool display_failure) const
     float angle_deg, distance;
     if (copter.avoid.proximity_avoidance_enabled() && copter.g2.proximity.get_closest_object(angle_deg, distance)) {
         // display error if something is within 60cm
-        if (distance <= 0.6f) {
-            check_failed(ARMING_CHECK_PARAMETERS, display_failure, "Proximity %d deg, %4.2fm", (int)angle_deg, (double)distance);
+        const float tolerance = 0.6f;
+        if (distance <= tolerance) {
+            check_failed(ARMING_CHECK_PARAMETERS, display_failure, "Proximity %d deg, %4.2fm (want <= %0.2fm)", (int)angle_deg, (double)distance, (double)tolerance);
             return false;
         }
     }