--- a/svghmi/gen_index_xhtml.xslt	Tue Oct 22 17:06:31 2019 +0200
+++ b/svghmi/gen_index_xhtml.xslt	Tue Oct 22 22:58:55 2019 +0200
@@ -586,13 +586,13 @@
 </xsl:text>
     <xsl:text>            subscriptions[index] = new_period;
 </xsl:text>
-    <xsl:text>            delta.push(new Blob([
+    <xsl:text>            delta.push(
 </xsl:text>
     <xsl:text>                new Uint8Array([2]), /* subscribe = 2 */
 </xsl:text>
     <xsl:text>                new Uint32Array([index]), 
 </xsl:text>
-    <xsl:text>                new Uint16Array([new_period])]));
+    <xsl:text>                new Uint16Array([new_period]));
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
@@ -608,17 +608,17 @@
 </xsl:text>
     <xsl:text>function send_hmi_value(index, value) {
 </xsl:text>
-    <xsl:text>    iectype = hmitree_types[index];
-</xsl:text>
-    <xsl:text>    jstype = typedarray_types[iectype];
+    <xsl:text>    let iectype = hmitree_types[index];
+</xsl:text>
+    <xsl:text>    let jstype = typedarray_types[iectype];
 </xsl:text>
     <xsl:text>    send_blob([
 </xsl:text>
     <xsl:text>        new Uint8Array([0]),  /* setval = 0 */
 </xsl:text>
-    <xsl:text>        new jstype([value])
-</xsl:text>
-    <xsl:text>        ]);
+    <xsl:text>        new Uint32Array([index]), 
+</xsl:text>
+    <xsl:text>        new jstype([value])]);
 </xsl:text>
     <xsl:text>
 </xsl:text>

--- a/svghmi/svghmi.c	Tue Oct 22 17:06:31 2019 +0200
+++ b/svghmi/svghmi.c	Tue Oct 22 22:58:55 2019 +0200
@@ -286,7 +286,7 @@
                     void *dst_p = &rbuf[dsc->buf_index];
                     uint32_t sz = __get_type_enum_size(dsc->type);
 
-                    if((valptr + sz) < end)
+                    if((valptr + sz) <= end)
                     {
                         // rescheduling spinlock until free
                         while(AtomicCompareExchange(&dsc->rlock, 0, 1)) sched_yield();

--- a/svghmi/svghmi.js	Tue Oct 22 17:06:31 2019 +0200
+++ b/svghmi/svghmi.js	Tue Oct 22 22:58:55 2019 +0200
@@ -129,10 +129,10 @@
 
         if(previous_period != new_period) {
             subscriptions[index] = new_period;
-            delta.push(new Blob([
+            delta.push(
                 new Uint8Array([2]), /* subscribe = 2 */
                 new Uint32Array([index]), 
-                new Uint16Array([new_period])]));
+                new Uint16Array([new_period]));
         }
         
     }
@@ -140,12 +140,12 @@
 };
 
 function send_hmi_value(index, value) {
-    iectype = hmitree_types[index];
-    jstype = typedarray_types[iectype];
+    let iectype = hmitree_types[index];
+    let jstype = typedarray_types[iectype];
     send_blob([
         new Uint8Array([0]),  /* setval = 0 */
-        new jstype([value])
-        ]);
+        new Uint32Array([index]), 
+        new jstype([value])]);
 
 };