diff --git a/firmware/web.cpp b/firmware/web.cpp
index 1532f3c..618c4ee 100644
--- a/firmware/web.cpp
+++ b/firmware/web.cpp
@@ -248,6 +248,20 @@ void websocket_task(void *pvParameter) {
         }
         //printf("9: %d\n",gpio_read(9));
         //printf("10: %d\n",gpio_read(10));
+
+        vTaskDelayMs(250);
+        {
+            uint8_t response[3];
+            uint16_t val;
+            val = sdk_system_adc_read();
+            response[2] = (uint8_t) val;
+            response[1] = val >> 8;
+            response[0] = 'V';
+            LOCK_TCPIP_CORE();
+            websocket_write(pcb, response, 3, WS_BIN_MODE);
+            UNLOCK_TCPIP_CORE();
+        }
+        vTaskDelayMs(500);
     }
 
     syslog_detach();
diff --git a/firmware/webdir/index.html b/firmware/webdir/index.html
index 22e3c4d..81c721a 100644
--- a/firmware/webdir/index.html
+++ b/firmware/webdir/index.html
@@ -338,6 +338,10 @@
         return result ? [parseInt(result[1], 16), parseInt(result[2], 16), parseInt(result[3], 16)] : null;
     }
 
+    var ws;
+    var retries;
+    var series = new TimeSeries();
+
     function setMsg(cls, text) {
         sbox.className = "label " + cls;
         sbox.innerHTML = text;
@@ -619,13 +623,6 @@
         }
     }
 
-    function update_progress(progressBar, progress) {
-        var iP = Math.floor(progress);
-        var dBar = document.getElementById("progress_bar_" + progressBar);
-        dBar.innerText = iP + "%";
-        dBar.style.width = progress + "%";
-    }
-
     var sta_toggle = document.getElementById("sta_toggle");
     var sta_ssid = document.getElementById("sta_ssid");
     var sta_pw = document.getElementById("sta_pw");
@@ -667,6 +664,13 @@
         tx_len = view1.setInt8Vec(tx_len, [255, 255, 255, 0]);
         wsWrite(buffer);
     }
+
+    function update_progress(progressBar, progress) {
+        var iP = Math.floor(progress);
+        var dBar = document.getElementById("progress_bar_" + progressBar);
+        dBar.innerText = iP + "%";
+        dBar.style.width = progress + "%";
+    }
 </script>
 </body>
 </html>
\ No newline at end of file