diff --git a/src/energenie/Registry.py b/src/energenie/Registry.py
index 212afe7..53f1dac 100644
--- a/src/energenie/Registry.py
+++ b/src/energenie/Registry.py
@@ -153,15 +153,18 @@
     def size(self):
         return len(self.store)
 
-    @unimplemented
+    @untested
     def append(self, key, values):
+        print("####HERE")
+        print(values, type(values))
         """Append a new record to the persistent file"""
-        pass #TODO
-        # open file for append
-        # write ADD key
-        # for all values
-        #   write k=v
-        # close file
+        with open(self.filename, 'w+') as f:
+            f.write("ADD %s\n" % key)
+            for k in values:
+                v = values[k]
+                f.write("%s=%s\n" % (k, v))
+            f.write("\n")
+
 
     @unimplemented
     def remove(self, key):
@@ -235,7 +238,19 @@
 
     def add(self, device, name):
         """Add a device class instance to the registry, with a friendly name"""
-        self.store[name] = device
+        ####HERE
+        #TODO: this is a Device class instance
+        #need to get appropriate data out from it as a map
+        #TODO: This is correct for a MiHomeDevice
+        #but not for a LegacyDevice
+        #TODO: Also, need the class name
+        values = {
+            "type":                Devices.MiHomeDevice, ##TODO MIHO005 ??
+            "manufacturer_id":     device.manufacturer_id,
+            "product_id":          device.product_id,
+            "device_id":           device.device_id
+        }
+        self.store[name] = values
 
     def get(self, name): # -> Device
         """Get the description for a device class from the store, and construct a class instance"""
diff --git a/src/energenie/Registry_test.py b/src/energenie/Registry_test.py
index c2332ce..0597cb4 100644
--- a/src/energenie/Registry_test.py
+++ b/src/energenie/Registry_test.py
@@ -23,11 +23,17 @@
 
         # add some devices to the registry, it should auto update the file
         registry.add(Devices.MIHO005(device_id=0x68b), "tv")
-        registry.add(Devices.ENER002(device_id=(0xC8C8C, 1)), "fan")
+        #TODO: Need to have a way to get the persistent summary of a device class
+        #Perhaps in Device(), LegacyDevice() and MiHomeDevice() it does this for us
+        #and returns a map we can just persist and create from later?
+
+        ##registry.add(Devices.ENER002(device_id=(0xC8C8C, 1)), "fan")
 
         # see what the file looks like
         with open(registry.DEFAULT_FILENAME) as f:
-            print(f.readlines())
+            for l in f.readlines():
+                l = l.strip() # remove nl
+                print(l)
 
     @test_0
     def test_load(self):