diff --git a/packages/usb/write-config.js b/packages/usb/write-config.js
index 9d80423e..9c6404c0 100755
--- a/packages/usb/write-config.js
+++ b/packages/usb/write-config.js
@@ -23,29 +23,26 @@ let offset = 0;
 let configBuffer = fs.readFileSync(configBin);
 let chunkSizeToRead;
 
-const payload = new Buffer([uhk.usbCommands.getDeviceProperty, uhk.devicePropertyIds.configSizes]);
+(async function() {
+    let buffer = await uhk.writeDevice(device, [uhk.usbCommands.getDeviceProperty, uhk.devicePropertyIds.configSizes]);
+    const hardwareConfigMaxSize = buffer[1] + (buffer[2]<<8);
+    const userConfigMaxSize = buffer[3] + (buffer[4]<<8);
+    const configMaxSize = isHardwareConfig ? hardwareConfigMaxSize : userConfigMaxSize;
+    const configSize = Math.min(configMaxSize, configBuffer.length);
 
-device.write(uhk.getTransferData(payload));
-let buffer = Buffer.from(device.readSync());
-const hardwareConfigMaxSize = buffer[1] + (buffer[2]<<8);
-const userConfigMaxSize = buffer[3] + (buffer[4]<<8);
-const configMaxSize = isHardwareConfig ? hardwareConfigMaxSize : userConfigMaxSize;
-const configSize = Math.min(configMaxSize, configBuffer.length);
+    while (offset < configSize) {
+        const usbCommand = isHardwareConfig ? uhk.usbCommands.writeHardwareConfig : uhk.usbCommands.writeStagingUserConfig;
+        chunkSizeToRead = Math.min(chunkSize, configSize - offset);
 
-while (offset < configSize) {
-    const usbCommand = isHardwareConfig ? uhk.usbCommands.writeHardwareConfig : uhk.usbCommands.writeStagingUserConfig;
-    chunkSizeToRead = Math.min(chunkSize, configSize - offset);
+        if (chunkSizeToRead === 0) {
+            break;
+        }
 
-    if (chunkSizeToRead === 0) {
-        break;
+        buffer = [
+            ...[usbCommand, chunkSizeToRead, offset & 0xff, offset >> 8],
+            ...configBuffer.slice(offset, offset+chunkSizeToRead)
+        ];
+        await uhk.writeDevice(device, buffer)
+        offset += chunkSizeToRead;
     }
-
-    buffer = Buffer.concat([
-        new Buffer([usbCommand, chunkSizeToRead, offset & 0xff, offset >> 8]),
-        configBuffer.slice(offset, offset+chunkSizeToRead)
-    ]);
-
-    device.write(uhk.getTransferData(buffer));
-    device.readSync();
-    offset += chunkSizeToRead;
-}
+})();