diff --git a/firmware/fiatlux.c b/firmware/fiatlux.c
index 31f12dd..93433d9 100644
--- a/firmware/fiatlux.c
+++ b/firmware/fiatlux.c
@@ -23,7 +23,7 @@ void user_init(void) {
 
     wifi_available_semaphore = xSemaphoreCreateBinary();
 
-    xTaskCreate(mqtt_task, "mqtt_task", 1024, NULL, 1, NULL);
+    //xTaskCreate(mqtt_task, "mqtt_task", 1024, NULL, 1, NULL);
 
     xTaskCreate(wifi_task, "wifi_task", 1024, NULL, 1, NULL);
 
@@ -34,7 +34,7 @@ void user_init(void) {
     wifi_alive = xSemaphoreCreateBinary();
     publish_queue = xQueueCreate(3, PUB_MSG_LEN);
 
-    xTaskCreate(&beat_task, "beat_task", 256, NULL, 3, NULL);
+    //xTaskCreate(&beat_task, "beat_task", 256, NULL, 3, NULL);
 
 
 }
diff --git a/firmware/log.cpp b/firmware/log.cpp
index 07e7f19..e3b9a00 100644
--- a/firmware/log.cpp
+++ b/firmware/log.cpp
@@ -17,14 +17,14 @@ char str_i32[] = "00000000";
 
 extern "C" void syslog_i32(const uint32_t val) {
 
-    str_i32[1] = hex_lookup[val & 0xF];
-    str_i32[0] = hex_lookup[(val >> 4) & 0xF];
-    str_i32[3] = hex_lookup[(val >> 8) & 0xF];
-    str_i32[2] = hex_lookup[(val >> 12) & 0xF];
-    str_i32[5] = hex_lookup[(val >> 16) & 0xF];
-    str_i32[4] = hex_lookup[(val >> 20) & 0xF];
-    str_i32[7] = hex_lookup[(val >> 24) & 0xF];
-    str_i32[6] = hex_lookup[(val >> 28) & 0xF];
+    str_i32[7] = hex_lookup[val & 0xF];
+    str_i32[6] = hex_lookup[(val >> 4) & 0xF];
+    str_i32[5] = hex_lookup[(val >> 8) & 0xF];
+    str_i32[4] = hex_lookup[(val >> 12) & 0xF];
+    str_i32[3] = hex_lookup[(val >> 16) & 0xF];
+    str_i32[2] = hex_lookup[(val >> 20) & 0xF];
+    str_i32[1] = hex_lookup[(val >> 24) & 0xF];
+    str_i32[0] = hex_lookup[(val >> 28) & 0xF];
     //
     syslog(str_i32);
 }
diff --git a/firmware/lux.cpp b/firmware/lux.cpp
index 7f139ad..790ce87 100644
--- a/firmware/lux.cpp
+++ b/firmware/lux.cpp
@@ -36,32 +36,9 @@ struct apa10xx_pixel_t {
     uint8_t r = 0;
 };
 
-static ws2812_pixel_t next_colour(int i) {
-    ws2812_pixel_t colour = {{0, 0, 0, 0}};
-    if(i == 8) {
-        colour.white = 32;
-    } else {
-        colour.red = i & 1 ? 32 : 0;
-        colour.green = i & 2 ? 32 : 0;
-        colour.blue = i & 4 ? 32 : 0;
-    }
-
-    return colour;
-}
-
-static apa10xx_pixel_t next_color(int i) {
-    apa10xx_pixel_t colour;
-    colour.global.mod = 8;
-    colour.r = i & 1 ? 32 : 0;
-    colour.g = i & 2 ? 32 : 0;
-    colour.b = i & 4 ? 32 : 0;
-
-    return colour;
-}
-
 rgba_t top_color;
 rgba_t bottom_color;
-uint16_t dimmer_value;
+volatile uint16_t light_value;
 
 namespace fiatlux {
 
@@ -246,6 +223,20 @@ extern "C" void signal_led(bool state) {
     fiatlux::signal::write_data(state);
 }
 
+uint32_t spi_transfer_32_duplex(uint8_t bus, uint32_t val) {
+    uint32_t out = val;
+    uint32_t in;
+    spi_transfer(bus, &out, &in, 1, SPI_32BIT);
+    return in;
+};
+
+uint16_t spi_transfer_16_duplex(uint8_t bus, uint32_t val) {
+    uint16_t out = val;
+    uint16_t in;
+    spi_transfer(bus, &out, &in, 1, SPI_16BIT);
+    return in;
+};
+
 
 /* This task uses the high level GPIO API (esp_gpio.h) to blink an LED.
  *
@@ -266,7 +257,7 @@ extern "C" [[noreturn]] void lux_task(void *pvParameters) {
     ws2812_i2s_init(lux_ws2812_number, PIXEL_RGBW);
     memset(pixels, 0, sizeof(ws2812_pixel_t) * lux_ws2812_number);
 
-    apa10xx_pixel_t leds[lux_apa10xx_number];
+    //apa10xx_pixel_t leds[lux_apa10xx_number]; // TODO
 
     //lux_apa102c_number
 
@@ -279,7 +270,7 @@ extern "C" [[noreturn]] void lux_task(void *pvParameters) {
     fiatlux::relais::setup();
 
     //fiatlux::apa10x::setup();
-    spi_init(1, SPI_MODE0, SPI_FREQ_DIV_500K, true, SPI_BIG_ENDIAN, false);
+    spi_init(1, SPI_MODE0, SPI_FREQ_DIV_2M, true, SPI_BIG_ENDIAN, false);
 
     /*
      CC48 API:
@@ -288,83 +279,70 @@ extern "C" [[noreturn]] void lux_task(void *pvParameters) {
      - [2*n+1] = 8bit PWM value
      */
 
-    uint32_t dummy = 0;
-
     union {
         struct {
-            unsigned dat: 16;
-            unsigned addr: 12;
-            unsigned op: 4;
+            unsigned dat: 12;
+            unsigned addr: 4;
         } __attribute__((packed));
-        uint32_t _;
+        uint16_t _;
     } frame = {._=0};
 
-    dimmer_value = 255;
+    light_value = 0xFFF;
 
-    uint16_t last_dimmer_value = 0;
+    uint16_t last_light_value = 0xFFFF;
 
     while (true) {
-        /*for (int j = 0; j < 64; j++) {
-            for (int i = 0; i < 8; i++)
-                spi_dac(i, 64 * j);
-            //printf("> %d\n", 64*j);
-            vTaskDelay(100 / portTICK_PERIOD_MS);
-        }*/
-        /*gpio_write(gpio4, 1);
-        vTaskDelay(200 / portTICK_PERIOD_MS);
-        gpio_write(gpio4, 0);
-        for (int i = 0; i < 8; i++)
-            spi_dac(i, 0);
 
-        gpio_write(gpio5, 1);
-        vTaskDelay(200 / portTICK_PERIOD_MS);
-        gpio_write(gpio5, 0);*/
         fiatlux::signal::write_data(false);
-        for (int c = 8; c >= 0; c--) {
 
-            /*for (auto &pixel: pixels) {
-                pixel = next_colour(c);
-            }*/
+        if(last_light_value != light_value) {
 
-            if(last_dimmer_value != dimmer_value) {
-                for (int i = 0; i < 6; ++i) {
+            syslog("# ");
+            syslog_i32(light_value);
+            syslog("\n");
 
-                    frame.op = 0xA;
-                    frame.addr = i * 2 + 1;
-                    frame.dat = 255;
-                    spi_transfer_32(1, frame._);
+            for (int i = 0; i < 6; ++i) {
 
-                    vTaskDelay(13 / portTICK_PERIOD_MS);
-                    //for (volatile int i = 0; i < 512 * 32; ++i);
+                frame.addr = i;
+                frame.dat = light_value;
+                uint16_t reply = spi_transfer_16_duplex(1, frame._);
 
-                    frame.op = 0xA;
-                    frame.addr = i * 2;
-                    frame.dat = dimmer_value << 4;
-                    spi_transfer_32(1, frame._);
+                /*if(!i) {
+                    syslog(" > ");
+                    syslog_i32(frame._);
 
-                    vTaskDelay(13 / portTICK_PERIOD_MS);
-                    //for (volatile int i = 0; i < 512 * 32; ++i);
-                }
-                //last_dimmer_value = dimmer_value;
+                    if(reply) {
+                        syslog(" < ");
+                        syslog_i32(reply);
+                    }
+                    syslog("\n");
+                }*/
+
+                for (volatile int k = 0; k < 512; ++k);
             }
 
-            for (int i = 0; i < 120; i++)
-                pixels[i] = {{top_color.r, top_color.g, top_color.b, top_color.a}};
-
-            for (int i = 120; i < 240; i++)
-                pixels[i] = {{bottom_color.r, bottom_color.g, bottom_color.b, bottom_color.a}};
-
-            ws2812_i2s_update(pixels, PIXEL_RGBW);
-            //fiatlux::write_channel((uint8_t *) &leds[0], lux_apa10xx_number, 4, fiatlux::hal_module_t::APA10X);
-            vTaskDelay(200 / portTICK_PERIOD_MS);
+            last_light_value = light_value;
         }
+
+        vTaskDelay(200 / portTICK_PERIOD_MS);
+
+        for (int i = 0; i < 120; i++)
+            pixels[i] = {{top_color.r, top_color.g, top_color.b, top_color.a}};
+
+        for (int i = 120; i < 240; i++)
+            pixels[i] = {{bottom_color.r, bottom_color.g, bottom_color.b, bottom_color.a}};
+
+        ws2812_i2s_update(pixels, PIXEL_RGBW);
+
+        /*//fiatlux::write_channel((uint8_t *) &leds[0], lux_apa10xx_number, 4, fiatlux::hal_module_t::APA10X);
+        vTaskDelay(200 / portTICK_PERIOD_MS);
         fiatlux::relais::write_data(true, false);
         vTaskDelay(200 / portTICK_PERIOD_MS);
         fiatlux::relais::write_data(false, true);
         vTaskDelay(200 / portTICK_PERIOD_MS);
         fiatlux::relais::write_data(false, false);
         fiatlux::signal::write_data(true);
-        vTaskDelay(200 / portTICK_PERIOD_MS);
+        vTaskDelay(200 / portTICK_PERIOD_MS);*/
 
 
     }
diff --git a/firmware/lux.h b/firmware/lux.h
index 1c9d9e5..e524a7f 100644
--- a/firmware/lux.h
+++ b/firmware/lux.h
@@ -24,7 +24,7 @@ typedef struct {
 
 extern rgba_t top_color;
 extern rgba_t bottom_color;
-extern uint16_t dimmer_value;
+extern volatile uint16_t light_value;
 
 #ifdef __cplusplus
 }
diff --git a/firmware/messages.h b/firmware/messages.h
index d054569..737138a 100644
--- a/firmware/messages.h
+++ b/firmware/messages.h
@@ -55,9 +55,9 @@ namespace fiatlux {
         } __attribute__((packed));
 
         struct system_info {
-            unsigned walltime;
-            unsigned uptime;
-            int heap;
+            uint32_t walltime;
+            uint32_t uptime;
+            int32_t heap;
             uint32_t chipid;
             uint32_t flashid;
             uint32_t flashsize;
diff --git a/firmware/mkwebfs.py b/firmware/mkwebfs.py
index e48548c..495e525 100755
--- a/firmware/mkwebfs.py
+++ b/firmware/mkwebfs.py
@@ -78,12 +78,14 @@ for file in httpFiles:
         else:
             response = b'HTTP/1.0 200 OK\r\n'
         response += b"lwIP/1.4.1 (http://savannah.nongnu.org/projects/lwip)\r\n"
+        #fext = file.split('.')[-1]
         response += b'Content-type: ' + mimeType.encode() + b'\r\n'
 
         binFile = open(file, 'rb')
         binData = binFile.read()
         compEff = False
         if args.minify:
+            # shell: binData | minify --html-keep-document-tags --mime text/html | minData
             p = subprocess.Popen(["minify", "--html-keep-document-tags", "--mime", mimeType], stdin=subprocess.PIPE,
                                  stdout=subprocess.PIPE)
             minData = p.communicate(binData)[0]
diff --git a/firmware/web.cpp b/firmware/web.cpp
index 35f4eee..eda4dfe 100644
--- a/firmware/web.cpp
+++ b/firmware/web.cpp
@@ -30,7 +30,6 @@ using namespace fiatlux;
 
 #define vTaskDelayMs(ms) vTaskDelay((ms) / portTICK_PERIOD_MS)
 
-
 uint16_t voltage_val;
 
 struct {
@@ -44,7 +43,7 @@ void websocket_task(void *pvParameter) {
     auto *pcb = (struct tcp_pcb *) pvParameter;
 
     size_t connstarttime = xTaskGetTickCount();
-    has_changed = {true, true, true};
+    has_changed = {true, true, true, true};
     syslog_attach();
     unsigned local_log_tail = syslog_current_tail();
 
@@ -73,7 +72,7 @@ void websocket_task(void *pvParameter) {
         }
 
         //Global Info
-        if(false && has_changed.global) {
+        if(has_changed.global) {
             timeval tv{};
             gettimeofday(&tv, nullptr);
             size_t uptime = xTaskGetTickCount() * portTICK_PERIOD_MS / 1000;
@@ -95,6 +94,11 @@ void websocket_task(void *pvParameter) {
             frame.msg.flashsize = flash_size;
             //frame.msg. = ; // hostname
 
+            LOCK_TCPIP_CORE();
+            websocket_write(pcb, (unsigned char *) &frame, sizeof(frame), WS_BIN_MODE);
+            has_changed.global = false;
+            UNLOCK_TCPIP_CORE();
+
             free(hostname);
             /*LOCK_TCPIP_CORE();
             websocket_write(pcb, (uint8_t * ) &frame, sizeof(frame), WS_BIN_MODE);
@@ -107,13 +111,13 @@ void websocket_task(void *pvParameter) {
             gettimeofday(&tv, nullptr);
             size_t connuptime = (xTaskGetTickCount() - connstarttime) * portTICK_PERIOD_MS / 1000;
 
-            printf("conn %d: %d.%.%.%d <->  %d.%d.&d.%d \n", pcb->netif_idx, IP2STR(&pcb->local_ip),
+            printf("conn %d: %d.%d.%d.%d <->  %d.%d.%d.%d \n", pcb->netif_idx, IP2STR(&pcb->local_ip),
                    IP2STR(&pcb->remote_ip));
             char response[192];
             size_t
                     len = snprintf(response, sizeof(response), "{\"connage\" : \"%d\"," "\"clientip\" : \""
-            IPSTR
-            "\"" "}", connuptime, IP2STR(&pcb->remote_ip));
+                                                               IPSTR
+                                                               "\"" "}", connuptime, IP2STR(&pcb->remote_ip));
             if(len < sizeof(response)) {
                 LOCK_TCPIP_CORE();
                 websocket_write(pcb, (unsigned char *) response, len, WS_TEXT_MODE);
@@ -213,7 +217,7 @@ void websocket_task(void *pvParameter) {
             res.ret = OK;
             res.cmd = (messages::id) 'V';
             LOCK_TCPIP_CORE();
-            websocket_write(pcb, (uint8_t * ) & res, sizeof(res), WS_BIN_MODE);
+            websocket_write(pcb, (uint8_t *) &res, sizeof(res), WS_BIN_MODE);
             UNLOCK_TCPIP_CORE();
             taskYIELD();
         } else {
@@ -257,7 +261,7 @@ void websocket_cb(struct tcp_pcb *pcb, char *data, u16_t data_len,
         res.ret = OK;
     } else if(data[0] == 'B') {
         // Disable LED
-        uint32_t val = data[4] | (data[5] << 8) | (data[6] << 16) | (data[7] << 24);
+        uint32_t val = data[7] | (data[6] << 8) | (data[5] << 16) | (data[4] << 24);
         bottom_color.r = data[7];
         bottom_color.g = data[6];
         bottom_color.b = data[5];
@@ -270,17 +274,28 @@ void websocket_cb(struct tcp_pcb *pcb, char *data, u16_t data_len,
         res.val = 1;
     } else if(data[0] == 'T') {
         // Disable LED
-        uint32_t val = data[4] | (data[5] << 8) | (data[6] << 16) | (data[7] << 24);
+        uint32_t val = data[7] | (data[6] << 8) | (data[5] << 16) | (data[4] << 24);
         top_color.r = data[7];
         top_color.g = data[6];
         top_color.b = data[5];
-        syslog("B");
+        syslog("T");
         syslog_i32(val);
         syslog("\n");
         //signal_led(false);
         res.cmd = (messages::id) 'T';
         res.ret = OK;
         res.val = 1;
+    } else if(data[0] == 'J') {
+        // Disable LED
+        uint32_t val = data[7] | (data[6] << 8) | (data[5] << 16) | (data[4] << 24);
+        light_value = data[7] | (data[6] << 8);
+        syslog("J");
+        syslog_i32(val);
+        syslog("\n");
+        //signal_led(false);
+        res.cmd = (messages::id) 'J';
+        res.ret = OK;
+        res.val = 1;
     } else if(data[0] == 'D') {
         // Disable LED
         syslog("G\n");
@@ -358,7 +373,7 @@ void websocket_cb(struct tcp_pcb *pcb, char *data, u16_t data_len,
     }
 
     LOCK_TCPIP_CORE();
-    websocket_write(pcb, (uint8_t * ) & res, sizeof(res), WS_BIN_MODE);
+    websocket_write(pcb, (uint8_t *) &res, sizeof(res), WS_BIN_MODE);
     UNLOCK_TCPIP_CORE();
 
     if(res.ret == OK) {
@@ -418,9 +433,15 @@ extern "C" void httpd_task(void *pvParameters) {
     websocket_register_callbacks((tWsOpenHandler) websocket_open_cb, (tWsHandler) websocket_cb);
     httpd_init();
 
+    uint16_t last_voltage = 0;
     while (1) {
-        voltage_val = sdk_system_adc_read();
-        has_changed.voltage = true;
-        vTaskDelayMs(1000);
+        uint16_t voltage = sdk_system_adc_read();
+        if(false && voltage != last_voltage) {
+            last_voltage = voltage;
+            voltage_val = voltage;
+            has_changed.voltage = true;
+        }
+        //has_changed.global = true;
+        vTaskDelayMs(5000);
     }
 }
\ No newline at end of file
diff --git a/firmware/webdir/index.html b/firmware/webdir/index.html
index 6b5540f..5304ebe 100644
--- a/firmware/webdir/index.html
+++ b/firmware/webdir/index.html
@@ -259,17 +259,23 @@
                     </header>
                     <footer>
                         <label>
-                            <input type="checkbox" name="onoffswitch" id="led-switch" onclick="gpio(this.value)">
+                            <input type="checkbox" name="onoffswitch" id="led-switch" onclick="gpio(this.checked)">
                             <span class="toggle button">toggle signal led</span>
                         </label>
                         <label>
                             <span>toggle signal led</span>
-                            <input type="color" onchange="colorTop(this.value)">
+                            <input type="color" oninput="colorTop(this.value)">
                         </label>
                         <label>
                             <span>toggle signal led</span>
-                            <input type="color" onchange="colorBottom(this.value)">
+                            <input type="color" oninput="colorBottom(this.value)">
                         </label>
+                        <label>
+                            <span>toggle signal led</span>
+                            <input type="range" min="0" max="4096" value="0" class="slider"
+                                   oninput="lightSlider(this.value)">
+                        </label>
+
                     </footer>
                 </article>
             </div>
@@ -279,12 +285,18 @@
 <div id="unused_values" style="display:none;"></div>
 <script type="text/javascript" src="js/smoothie_min.js"></script>
 <script>
-    var menu = document.getElementById("bmenub");
     var voltage = document.getElementById("out_voltage");
     var syslog = document.getElementById("syslog");
+    var menu = document.getElementById("bmenub");
+    var onoffswitch = document.getElementById("led-switch");
+    var sbox = document.getElementById('status_box');
 
     var unused_values = {};
 
+    var ws;
+    var retries;
+    var series = new TimeSeries();
+
     DataView.prototype.setChar = function (pos, char) {
         this.setInt8(pos++, char.charCodeAt(0));
         return pos;
@@ -309,17 +321,20 @@
         return pos;
     };
 
+    function htons(n) {
+        return ((n & 0xFF) << 8) | ((n >> 8) & 0xFF);
+    }
+
+    function htonl(n) {
+        return ((n & 0xFF) << 24) | ((n & 0xFF00) << 8) | ((n >> 8) & 0xFF00) | ((n >> 24) & 0xFF);
+    }
+
     function colorStringToVec(hex) {
         var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
         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 = document.getElementById('status_box');
         sbox.className = "label " + cls;
         sbox.innerHTML = text;
         console.info(text);
@@ -344,30 +359,40 @@
         retries = 0;
         if (typeof evt.data == 'string') {
             var data = JSON.parse(evt.data);
-            for (const [key, value] of Object.entries(data)) {
-                const elements = document.querySelectorAll(".postfill_" + key);
-                if (!elements.length)
-                    unused_values[key] = value;
-                else
-                    for (i = 0; i < elements.length; ++i) {
-                        elements[i].innerHTML = value;
-                    }
-            }
-            document.getElementById("unused_values").innerHTML = JSON.stringify(unused_values);
+            console.log("deprecated json:", data);
         } else {
+            var data = {};
             var dv = new DataView(evt.data);
-            console.log("[0]", dv.getUint8(0));
-            var cmd = String.fromCharCode(dv.getUint8(0));
+            let cmds = ["NONE", "RESTART", "CLEAR_CONFIG", "FIRMWARE_FRAME", "FIRMWARE_CHECK", "VOLTAGE_INFO", "SYSTEM_INFO"];
+            //console.log("[0]", dv.getUint8(0));
+            let fst = dv.getUint8(0);
+            var cmd;
+            if (fst < cmds.length) {
+                cmd = cmds[fst];
+            } else {
+                cmd = String.fromCharCode(fst);
+            }
             var val = dv.getUint16(1);
 
-            if (cmd === 'G')
+            if (cmd === "SYSTEM_INFO") {
+                data.walltime = htonl(dv.getUint32(1));
+                data.uptime = htonl(dv.getUint32(5));
+                data.heap = htonl(dv.getInt32(9));
+                data.chipid = Number(htonl(dv.getUint32(13))).toString(16);
+                data.flashid = Number(htonl(dv.getUint32(17))).toString(16);
+                data.flashsize = htonl(dv.getUint32(21));
+            } else if (cmd === "VOLTAGE_INFO") {
+                console.log(cmd, buf2hex(evt.data));
+            } else if (cmd === "G") {
                 console.log("LED switched", val);
-            else if ((cmd === 'F') || (cmd === "C")) {
+                onoffswitch.checked = !!val;
+                console.log("LED ", onoffswitch);
+            } else if ((cmd === "F") || (cmd === "C")) {
                 receive_chunk_confirmation(dv);
-            } else if (cmd === 'V') {
+            } else if (cmd === "V") {
                 voltage.innerHTML = (val * 13 / 1024).toFixed(2);
                 series.append(new Date().getTime(), val);
-            } else if (cmd === 'L') {
+            } else if (cmd === "L") {
                 var len = dv.getUint8(1);
                 var offset = dv.getUint16(2);
                 var str = "";
@@ -376,9 +401,22 @@
                 syslog.innerHTML = syslog.innerHTML.slice(0, offset) + str;
                 const scrollingElement = (document.scrollingElement || document.body);
                 scrollingElement.scrollTop = scrollingElement.scrollHeight;
-            } else
+            } else {
+                console.log("[0]", dv.getUint8(0));
                 console.log('unknown command', cmd, val);
+                console.log(cmd);
+            }
         }
+        for (const [key, value] of Object.entries(data)) {
+            const elements = document.querySelectorAll(".postfill_" + key);
+            if (!elements.length)
+                unused_values[key] = value;
+            else
+                for (i = 0; i < elements.length; ++i) {
+                    elements[i].innerHTML = value;
+                }
+        }
+        document.getElementById("unused_values").innerHTML = JSON.stringify(unused_values);
     }
 
     function wsOpen() {
@@ -448,11 +486,23 @@
         wsWrite(header);
     }
 
+    function lightSlider(val) {
+        var header = new ArrayBuffer(8);
+        var headerview = new DataView(header);
+        headerview.setChar(0, 'J');
+        headerview.setInt32(4, val);
+        console.log(buf2hex(header));
+        wsWrite(header);
+    }
+
     window.onload = function () {
         wsOpen();
         startPolling();
     }
 
+    var firmware_file;
+    const chunk_size = 512;
+
     var makeCRCTable = function () {
         var c;
         var crcTable = [];
@@ -478,8 +528,6 @@
         return (crc ^ (-1)) >>> 0;
     };
 
-    var firmware_file;
-
     function load_firmware(evt) {
         var file = evt.target.files[0];
         if (!file) {
@@ -493,8 +541,6 @@
         reader.readAsArrayBuffer(file)
     }
 
-    const chunk_size = 512;
-
     function transmit_firmware_chunk(buf, i) {
         return new Promise((resolve, reject) => {
             const begin = i * chunk_size;
@@ -556,6 +602,13 @@
         }
     }
 
+    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");
@@ -597,13 +650,6 @@
         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>
+</html>
\ No newline at end of file