diff --git a/README.md b/README.md
index a0a7ed4..8e1bb2f 100644
--- a/README.md
+++ b/README.md
@@ -1,29 +1,31 @@
 # Web Bluetooth DFU
 Device firmware update with Web Bluetooth
 
-Update device firmware via [Web Bluetooth](https://webbluetoothcg.github.io/web-bluetooth/) using the protocol here:
+Update device firmware via [Web Bluetooth](https://webbluetoothcg.github.io/web-bluetooth/) following the protocol here:
 
-[http://developer.nordicsemi.com/nRF51_SDK/nRF51_SDK_v8.x.x/doc/8.1.0/s110/html/a00103.html](http://developer.nordicsemi.com/nRF51_SDK/nRF51_SDK_v8.x.x/doc/8.1.0/s110/html/a00103.html)
+http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk52.v0.9.2/bledfu_transport.html?cp=4_0_2_4_2_4
 
 ## Device Configuration
 
-Put this firmware onto an [nrf51822](https://www.nordicsemi.com/eng/Products/nRF51-DK):
+You will need an [nRF51](https://www.nordicsemi.com/Products/nRF51-DK) or [nRF52](https://www.nordicsemi.com/Products/Bluetooth-Smart-Bluetooth-low-energy/nRF52-DK) development kit, flashed with the appropriate image:
 
-[NRF51822_DFU_Test_BOOT.hex](https://thegecko.github.io/web-bluetooth-dfu/firmware/NRF51822_DFU_Test_BOOT.hex)
+[nrf51_boot_s110.hex](https://thegecko.github.io/web-bluetooth-dfu/firmware/nrf51_boot_s110.hex)
 
-Then reset the device.
+[nrf52_boot_s132.hex](https://thegecko.github.io/web-bluetooth-dfu/firmware/nrf52_boot_s132.hex)
 
 ## Web Example
 
-Open this site in a Web Bluetooth enabled browser:
+Open this site in a [Web Bluetooth](https://webbluetoothcg.github.io/web-bluetooth/) enabled browser:
 
 [https://thegecko.github.io/web-bluetooth-dfu/](https://thegecko.github.io/web-bluetooth-dfu/)
 
 ## Node Example
 
-Install the npm dependencies and run.
+Clone this repository, install the npm dependencies and execute.
 
 ```
 npm install
-node example_node
-```
\ No newline at end of file
+node example_node <device-type>
+```
+
+Where ```<device-type>``` is one of ```nrf51``` or ```nrf52```.
\ No newline at end of file
diff --git a/dist/dfu.js b/dist/dfu.js
index d69681b..94379eb 100644
--- a/dist/dfu.js
+++ b/dist/dfu.js
@@ -1,10 +1,10 @@
 /* @license
  *
  * Device firmware update with Web Bluetooth
- * Version: 0.0.1
+ * Version: 0.0.2
  *
  * Protocol from:
- * http://developer.nordicsemi.com/nRF51_SDK/nRF51_SDK_v8.x.x/doc/8.1.0/s110/html/a00103.html
+ * http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk52.v0.9.2/bledfu_transport.html?cp=4_0_2_4_2_4
  *
  * The MIT License (MIT)
  *
@@ -114,27 +114,32 @@
      */
     function writeMode(device) {
         return new Promise(function(resolve, reject) {
-            var controlChar = null;
 /*
-            // Disconnect event currently not implemented...
+            // TODO: once disconnect event is implemented we should resolve in its callback...
             device.addEventListener("gattserverdisconnected", () => {
                 log("DFU Target issued GAP Disconnect and reset into Bootloader/DFU mode.");
                 resolve(device);                
             });
 */
+            var characteristics = null;
+
             connect(device)
             .then(chars => {
                 log("enabling notifications");
-                controlChar = chars.controlChar;
-                return controlChar.startNotifications();
+                characteristics = chars;
+                return characteristics.controlChar.startNotifications();
             })
             .then(() => {
                 log("writing modeData");
-                return controlChar.writeValue(new Uint8Array([1, 4]));
+                return characteristics.controlChar.writeValue(new Uint8Array([1, 4]));
             })
             .then(() => {
                 log("modeData written");
-                resolve(device); // TODO: once disconnect event is implemented we should resolve in its callback...
+                // Hack to gracefully disconnect without disconnect event
+                setTimeout(() => {
+                    characteristics.server.disconnect();
+                    resolve(device);
+                }, 2000);
             })
             .catch(error => {
                 error = "writeMode error: " + error;
@@ -143,7 +148,7 @@
             });
         });
     }
-    
+
     /**
      * Contains basic functionality for performing safety checks on software updates for nRF5 based devices.
      * Init packet used for pre-checking to ensure the following image is compatible with the device.
@@ -175,8 +180,9 @@
                     return versionChar.readValue()
                     .then(data => {
                         console.log('read versionChar');
-                        var major = data.getUint8(0);
-                        var minor = data.getUint8(1);
+                        var view = new DataView(data);
+                        var major = view.getUint8(0);
+                        var minor = view.getUint8(1);
                         return transfer(chars, arrayBuffer, imageType, major, minor);
                     });
                 } else {
@@ -232,14 +238,14 @@
                 log("found packet characteristic");
                 packetChar = characteristic;
                 service.getCharacteristic(versionUUID)
-                .then(characteristic => { // Older DFU implementations (from older Nordic SDKs) have no DFU Version characteristic. So this may fail.
+                // Older DFU implementations (from older Nordic SDKs) have no DFU Version characteristic. So this may fail.
+                .then(characteristic => {
                     log("found version characteristic");
                     versionChar = characteristic;
                     complete();
                 })
                 .catch(error => {
-                    error += ' no version charactersitic found';
-                    log(error);
+                    log("info: no version characteristic found");
                     complete();
                 });
             })
@@ -382,7 +388,7 @@
                         case OPCODE.VALIDATE_FIRMWARE:
                             log('complete, reset...');
 /*
-                            // Disconnect event currently not implemented
+                            // TODO: Resolve in disconnect event handler when implemented in Web Bluetooth API.
                             controlChar.service.device.addEventListener("gattserverdisconnected", () => {
                                 resolve();
                             });
@@ -390,7 +396,11 @@
                             controlChar.writeValue(new Uint8Array([OPCODE.ACTIVATE_IMAGE_AND_RESET]))
                             .then(() => {
                                 log('image activated and dfu target reset');
-                                resolve(); // TODO: Resolve in disconnect event handler when implemented in Web Bluetooth API.
+                                // Hack to gracefully disconnect without disconnect event
+                                setTimeout(() => {
+                                    chars.server.disconnect();
+                                    resolve();
+                                }, 2000);
                             })
                             .catch(error => {
                                 error = "error resetting: " + error;
diff --git a/example_node.js b/example_node.js
index 7330544..7bc7f72 100644
--- a/example_node.js
+++ b/example_node.js
@@ -5,12 +5,30 @@ var fs = require('fs');
 var log = console.log;
 dfu.addLogger(log);
 
-var fileMask = "firmware/NRF51822_{0}_Rob_OTA.hex";
+var fileMask = "";
 var fileName = null;
 
+var deviceType = process.argv[2];
+if (!deviceType) {
+    deviceType = "nrf51";
+    log("no device-type specified, defaulting to " + deviceType);
+}
+
+switch(deviceType) {
+    case "nrf51":
+        fileMask = "firmware/nrf51_app_{0}.hex";
+        break;
+    case "nrf52":
+        fileMask = "firmware/nrf52_app.hex";
+        break;
+    default:
+        log("unknown device-type: " + deviceType);
+        process.exit();
+}
+
 dfu.findDevice({ services: [0x180D] })
 .then(device => {
-    fileName = fileMask.replace("{0}", device.name === "Hi_Rob" ? "Bye" : "Hi");
+    fileName = fileMask.replace("{0}", device.name === "Hi_Rob" ? "bye" : "hi");
 	log("found device: " + device.name);
     log("using file name: " + fileName);
 
diff --git a/example_web.html b/example_web.html
index c7ff026..1020141 100644
--- a/example_web.html
+++ b/example_web.html
@@ -2,20 +2,35 @@
 <html>
 <head>
     <title>web-bluetooth-dfu</title>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
+    <style>
+        html, body { width: 100%; padding: 0; margin: 0; font-family: sans-serif; }
+        input { font-size: 20px; }
+        button { font-size: 20px; padding: 0 20px; display: block; margin: 20px auto; }
+        .device-type { width: 160px; margin: 20px auto; white-space: nowrap; }
+    </style>
 </head>
 <body>
-    <button onclick="setMode()" style="font-size: 20px;">Set Mode</button>
-    <button onclick="findDFU()" style="font-size: 20px;">Transfer</button>
-    <button onclick="both()" style="font-size: 20px;">Both</button>
+    <div class="device-type">
+        <input type="radio" name="device-type" id="nrf51" checked>
+        <label for="nrf51">nRF51</label>
+        <input type="radio" name="device-type" id="nrf52">
+        <label for="nrf52">nRF52</label>
+    </div>
+
+    <button onclick="setMode()">Set Mode</button>
+    <button onclick="findDFU()">Transfer</button>
+    <button onclick="both()">Both</button>
+
     <div id="results"></div>
 
     <script src="dist/dfu.js"></script>
     <script src="dist/hex2bin.js"></script>
 
     <script>
-        var urlMask = "//thegecko.github.io/web-bluetooth-dfu/firmware/NRF51822_{0}_Rob_OTA.hex";
-        var urlMask52 = "https://raw.githubusercontent.com/mjdietzx/web-bluetooth-dfu/develop/firmware/ble_app_hrs_with_dfu_nrf52.hex";
         var resultsEl = document.getElementById("results");
+        var urlBase = "//thegecko.github.io/web-bluetooth-dfu/firmware/";
 
         function log(message) {
             console.log(message);
@@ -36,8 +51,18 @@
 
         function transfer(device) {
             return new Promise(function(resolve, reject) {
-                var url = urlMask.replace("{0}", device.name === "Hi_Rob" ? "Bye" : "Hi");
-                //var url = urlMask52; // nRF52832 application (example BLE heart rate from Nordic SDK) for DFU OTA update.
+                var url = "";
+                var deviceType = document.querySelector('input[name="device-type"]:checked').id;
+
+                switch(deviceType) {
+                    case "nrf51":
+                        url = urlBase + "nrf51_app_{0}.hex";
+                        url = url.replace("{0}", device.name === "Hi_Rob" ? "bye" : "hi");
+                        break;
+                    case "nrf52":
+                        url = urlBase + "nrf52_app.hex";
+                        break;
+                }
 
                 download(url)
                 .then(hex => {
diff --git a/firmware/NRF51822_Bye_Rob_OTA.hex b/firmware/nrf51_app_bye.hex
similarity index 100%
rename from firmware/NRF51822_Bye_Rob_OTA.hex
rename to firmware/nrf51_app_bye.hex
diff --git a/firmware/NRF51822_Hi_Rob_OTA.hex b/firmware/nrf51_app_hi.hex
similarity index 100%
rename from firmware/NRF51822_Hi_Rob_OTA.hex
rename to firmware/nrf51_app_hi.hex
diff --git a/firmware/NRF51822_DFU_Test_BOOT.hex b/firmware/nrf51_boot_s110.hex
similarity index 100%
rename from firmware/NRF51822_DFU_Test_BOOT.hex
rename to firmware/nrf51_boot_s110.hex
diff --git a/firmware/ble_app_hrs_with_dfu_nrf52.hex b/firmware/nrf52_app.hex
similarity index 100%
rename from firmware/ble_app_hrs_with_dfu_nrf52.hex
rename to firmware/nrf52_app.hex
diff --git a/firmware/dfu_dual_bank_ble_s132_nrf52.hex b/firmware/nrf52_boot_s132.hex
similarity index 100%
rename from firmware/dfu_dual_bank_ble_s132_nrf52.hex
rename to firmware/nrf52_boot_s132.hex