We don't need to write anything on successful requests actually, 200 is the default

handlers/sensors.go

@@ -1,7 +1,6 @@
 package handlers
 
 import (
-	"io"
 	"log"
 	"math"
 	"net/http"
@@ -34,7 +33,5 @@ func EnvironmentSensor(
 		// Set SpaceAPI response values
 		resp.Value = newState
 		resp.LastChange = time.Now().Unix()
-
-		_, _ = io.WriteString(w, "Update Successful")
 	}
 }

handlers/state.go

@@ -1,7 +1,6 @@
 package handlers
 
 import (
-	"io"
 	"log"
 	"net/http"
 	"strconv"
@@ -33,7 +32,5 @@ func StateOpen(
 		// Set SpaceAPI response values
 		resp.Open = newState
 		resp.LastChange = time.Now().Unix()
-
-		_, _ = io.WriteString(w, "Update Successful")
 	}
 }