From da56b30be25fc654986fe195351a175eb9c9b748 Mon Sep 17 00:00:00 2001
From: ianhawkdev <ian.mccallion@gmail.com>
Date: Sat, 17 Jul 2021 13:30:32 +0100
Subject: [PATCH] Add an alternative method of triggering calibration via the
 com port. This allows calibration of devices without buttons

---
 HandbellController/HandbellController.ino | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/HandbellController/HandbellController.ino b/HandbellController/HandbellController.ino
index 4e1360d..e62ec8d 100644
--- a/HandbellController/HandbellController.ino
+++ b/HandbellController/HandbellController.ino
@@ -359,6 +359,13 @@ static bool UpdateCalibrationMode()
         {
             _calibrationHoldTime = currentTime;
         }
+        // Alternatively check if there is serial input and enter calibration mode if so
+        // This permits calibration of devices that do not have buttons
+		    if (Serial.available()){ // there is input
+            while (Serial.read()!=-1); // empty out the input buffer
+			      _calibrationMode = true;
+			      calibration_setup();
+		    }
     }
     return _calibrationMode;
 }