diff --git a/lib/activity.js b/lib/activity.js
index b75c914..579772d 100644
--- a/lib/activity.js
+++ b/lib/activity.js
@@ -3,8 +3,10 @@
 module.exports = skip => {
   let start = 0;
   let stop = 0;
+  let up = 0;
+  let total = 0;
   return {
-    on: time => {
+    on: (time, cmd) => {
       if (time > skip) {
         if (start == 0) {
           start = time;
@@ -12,7 +14,10 @@ module.exports = skip => {
           stop = time;
         }
       }
+      if (cmd === 15) { up = time; } 
+      else if (cmd === 14) { total += (time - up); up = time; }  
     },
-    time: () => stop - start
+    time: () => stop - start,
+    uptime: () => total
   };
 };