diff --git a/models/device.model.js b/models/device.model.js
index 63b2de7..a228ade 100644
--- a/models/device.model.js
+++ b/models/device.model.js
@@ -14,6 +14,7 @@ const DeviceModel = joi.object({
   relayTemperature: joi.number().optional(),
   relayConfigurationTimestamp: joi.number().optional(),
   vsoft: joi.string().optional(),
+  label: joi.string().optional(),
   inventory: joi.array().items( joi.object({
       msn: joi.string().required(),
       configurationTimestamp: joi.number().optional(),
diff --git a/services/device.service.js b/services/device.service.js
index 601379c..7795bac 100644
--- a/services/device.service.js
+++ b/services/device.service.js
@@ -1,6 +1,44 @@
 const dbcontroller = require('../db');
 const util = require('../util');
 
+const deviceUsesPrograms = function(device) {
+  switch (device.msn.slice(0,2).toUpperCase() || 'xx') {
+    case '1F':
+    case '20':
+    case '51':
+    case '53':
+    case '55':
+    case '5A':
+    case '7A': return false;
+
+    default: break;
+  }
+
+  if (device.programs != undefined) { return true; }
+  if (device.programs == undefined && device.slots == undefined) { return true; }
+
+  return false;
+}
+
+const deviceUsesSlots = function(device) {
+  switch (device.msn.slice(0,2).toUpperCase() || 'xx') {
+    case '1F':
+    case '20':
+    case '51':
+    case '53':
+    case '55':
+    case '5A':
+    case '7A': return true;
+
+    default: break;
+  }
+
+  if (device.slots != undefined) { return true; }
+  if (device.programs == undefined && device.slots == undefined) { return true; }
+
+  return false;
+}
+
 const postRequestToDo = async function (msn, body) {
   try {
     await dbcontroller.addDevice(body, null)
@@ -30,23 +68,23 @@ const getRequestToDo = async function (msn) {
       var todo = { serialNumber : msn }
 
       ///// Programs
-      if (device.programs != undefined) {
+      if (child.programmingTimestamp != undefined && deviceUsesPrograms(child)) {
         timestamp = child.programmingTimestamp || -1
-        if (timestamp < device.programs.timestamp) { todo.programs = 1 }
+        if ((device.programs == undefined) || (timestamp < device.programs.timestamp)) { todo.programs = 1 }
         else if (timestamp > device.programs.timestamp) { todo.programs = 2 }
       }
       
       ///// Configuration
-      if (device.configuration != undefined) {
+      if (child.configurationTimestamp != undefined) {
         timestamp = child.configurationTimestamp || child.relayConfigurationTimestamp || -1
-        if (timestamp < device.configuration.timestamp) { todo.configuration = 1 }
+        if ((device.configuration == undefined) || (timestamp < device.configuration.timestamp)) { todo.configuration = 1 }
         else if (timestamp > device.configuration.timestamp) { todo.configuration = 2 }
       }
       
       ///// Slots
-      if (device.slots != undefined) {
+      if (child.programmingTimestamp != undefined && deviceUsesSlots(child)) {
         timestamp = child.programmingTimestamp || -1
-        if (timestamp < device.slots.timestamp) { todo.slots = 1 }
+        if ((device.slots == undefined) || (timestamp < device.slots.timestamp)) { todo.slots = 1 }
         else if (timestamp > device.slots.timestamp) { todo.slots = 2 }
       }