From 6e148d2dbf95318b5e47547c50f44b5c1b082595 Mon Sep 17 00:00:00 2001
From: David R Forrest <drf5na@gmail.com>
Date: Mon, 1 May 2023 11:34:31 -0400
Subject: [PATCH] Add RELAY_ON /RELAY_OFF per
 https://github.com/br3ttb/Arduino-PID-Library/issues/136

---
 examples/PID_RelayOutput/PID_RelayOutput.ino | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/examples/PID_RelayOutput/PID_RelayOutput.ino b/examples/PID_RelayOutput/PID_RelayOutput.ino
index 17fbe1a..7c19203 100644
--- a/examples/PID_RelayOutput/PID_RelayOutput.ino
+++ b/examples/PID_RelayOutput/PID_RelayOutput.ino
@@ -18,6 +18,8 @@
 
 #define PIN_INPUT 0
 #define RELAY_PIN 6
+#define RELAY_ON LOW
+#define RELAY_OFF HIGH
 
 //Define Variables we'll be connecting to
 double Setpoint, Input, Output;
@@ -55,8 +57,14 @@ void loop()
   { //time to shift the Relay Window
     windowStartTime += WindowSize;
   }
-  if (Output < millis() - windowStartTime) digitalWrite(RELAY_PIN, HIGH);
-  else digitalWrite(RELAY_PIN, LOW);
+  if (Output > millis() - windowStartTime)
+  {
+    digitalWrite(RELAY_PIN, RELAY_ON);
+  }
+  else
+  {
+    digitalWrite(RELAY_PIN, RELAY_OFF);
+  }
 
 }