diff --git a/alerts.py b/alerts.py
--- a/alerts.py
+++ b/alerts.py
@@ -6,8 +6,9 @@ import logging
 
 class AlertManager:
 
-    def __init__(self, config):
+    def __init__(self, database, config):
         self.logger = logging.getLogger('hydrobot')
+        self.database = database
         self.from_addr = config.get("alerts", "from_address")
         self.to_addr  = config.get("alerts", "to_address")
         self.mail_server = config.get("alerts", "mail_server")
@@ -59,7 +60,7 @@ class AlertManager:
             server.login(self.username, self.password)
             server.send_message(msg)
             server.quit()
-            self.logger.debug("Sent email alert: " + message)
+            self.logger.info("Sent email alert: " + message)
         except:
             self.logger.error("Sending email alert failed!")
             
@@ -96,19 +97,24 @@ class OutputFeedbackAlert(Alert):
     def evalutate(self):
         
         #get output status
-        output_status = 1
+        output_status = self.manager.database.read_value(self.output_module, self.output_type, int(self.output_number))
+        print("Output status: " + str(output_status))
         #get input status
-        input_status = 0
-        if output_status == 1:
-            if input_status < self.on_threshold:
-                #alert!
-                print("Alert! " + self.name + " did not turn on!")
-                self.manager.send_alert("Alert! " + self.name + " did not turn on!")
-        if output_status == 0:
-            if input_status > self.off_threshold:
-                #alert!
-                print("Alert! " + self.name + " did not turn off!")
-                self.manager.send_alert("Alert! " + self.name + " did not turn off!")
+        input_status = self.manager.database.read_value(self.input_module, self.input_type, int(self.input_number))
+        print("Input status: " + str(input_status))
+        
+        if input_status != None:
+        
+            if output_status == 1:
+                if input_status < self.on_threshold:
+                    #alert!
+                    #print("Alert! " + self.name + " did not turn on!")
+                    self.manager.send_alert("Alert! " + self.name + " did not turn on!")
+            if output_status == 0:
+                if input_status > self.off_threshold:
+                    #alert!
+                    #print("Alert! " + self.name + " did not turn off!")
+                    self.manager.send_alert("Alert! " + self.name + " did not turn off!")
             
         
 class MeasurementAlert(Alert):
@@ -124,14 +130,17 @@ class MeasurementAlert(Alert):
         self.hysteresis = hysteresis
         
     def evalutate(self):
-        #get input status
-        input_status = 0
-        if input_status > self.high_threshold:
-            #alert!
-            print("Alert! " + self.name + " is too high!")
-            self.manager.send_alert("Alert! " + self.name + " is too high!")
-        if input_status < self.low_threshold:
-            #alert!
-            print("Alert! " + self.name + " is too low!")
-            self.manager.send_alert("Alert! " + self.name + " is too low!")
+        #get measurement
+        measurement = self.manager.database.read_value(self.input_module, self.input_type, int(self.input_number))
+        print("Measurement: " + str(measurement))
+        
+        if measurement != None:
+            if measurement > self.high_threshold:
+                #alert!
+                #print("Alert! " + self.name + " is too high!")
+                self.manager.send_alert("Alert! " + self.name + " is too high!")
+            if measurement < self.low_threshold:
+                #alert!
+                #print("Alert! " + self.name + " is too low!")
+                self.manager.send_alert("Alert! " + self.name + " is too low!")