diff --git a/sonoff/support.ino b/sonoff/support.ino
index 4930f8e4b..a5d6e9e4e 100644
--- a/sonoff/support.ino
+++ b/sonoff/support.ino
@@ -130,6 +130,24 @@ size_t strchrspn(const char *str1, int character)
   return ret;
 }
 
+// Function to return a substring defined by a delimiter at an index
+char* subStr(char* dest, char* str, const char *delim, int index)
+{
+  char *act;
+  char *sub;
+  char *ptr;
+  int i;
+
+  // Since strtok consumes the first arg, make a copy
+  strncpy(dest, str, strlen(str));
+  for (i = 1, act = dest; i <= index; i++, act = NULL) {
+    sub = strtok_r(act, delim, &ptr);
+    if (sub == NULL) break;
+  }
+  sub = Trim(sub);
+  return sub;
+}
+
 double CharToDouble(char *str)
 {
   // simple ascii to double, because atof or strtod are too large