kitchen_pilot_wire_control.ino: on/off logic is inverted

soft/kitchen/kitchen_pilot_wire_control/kitchen_pilot_wire_control.ino

@@ -23,17 +23,17 @@ void message_callback(const String &message)
 {
   Serial.println(message);
   if (message == "off") {
-      digitalWrite(heating_pin, LOW);
+      digitalWrite(heating_pin, HIGH);
   }
   if (message == "on") {
-      digitalWrite(heating_pin, HIGH);
+      digitalWrite(heating_pin, LOW);
   }
 }
 
 void setup()
 {
-  pinMode(heating_pin, OUTPUT);     // Initialize the LED_BUILTIN pin as an output
-  digitalWrite(heating_pin, LOW);   // Turn the LED on (Note that LOW is the voltage level
+  pinMode(heating_pin, OUTPUT);
+  digitalWrite(heating_pin, HIGH); // by default output the voltage that switches off the heater
 
   Serial.begin(115200);