diff --git a/src/lib/serial/device.ts b/src/lib/serial/device.ts
index 92c1be57..865204d9 100644
--- a/src/lib/serial/device.ts
+++ b/src/lib/serial/device.ts
@@ -440,46 +440,80 @@ export class CharaDevice {
     return Number(await this.send(1, "RAM").then(([bytes]) => bytes));
   }
 
-  async updateFirmware(file: File): Promise<void> {
-    const size = file.size;
-    // use separate serial connection
-    await this.port.open({ baudRate: this.baudRate });
-    const decoderStream = new TextDecoderStream();
-    this.port.readable!.pipeTo(decoderStream.writable);
-
-    const reader = decoderStream
-      .readable!.pipeThrough(new TransformStream(new LineBreakTransformer()))
-      .getReader();
-    serialLog.update((it) => {
-      it.push({
-        type: "system",
-        value: "Starting firmware update",
-      });
-      return it;
-    });
-
-    const writer = this.port.writable!.getWriter();
-    try {
-      await writer.write(new TextEncoder().encode(`RST OTA\r\n`));
-    } finally {
-      writer.releaseLock();
+  async updateFirmware(file: File | Blob): Promise<void> {
+    while (this.lock) {
+      await this.lock;
     }
-
-    console.log((await reader.read()).value);
-
-    await file.stream().pipeTo(this.port.writable!);
-
-    console.log((await reader.read()).value);
-
-    await reader.cancel();
-    reader.releaseLock();
-    await this.port.close();
-    serialLog.update((it) => {
-      it.push({
-        type: "system",
-        value: "Success?",
-      });
-      return it;
+    let resolveLock: (result: true) => void;
+    this.lock = new Promise<true>((resolve) => {
+      resolveLock = resolve;
     });
+    try {
+      if (this.suspendDebounceId) {
+        clearTimeout(this.suspendDebounceId);
+      } else {
+        await this.wake();
+      }
+
+      serialLog.update((it) => {
+        it.push({
+          type: "system",
+          value: "OTA Update",
+        });
+        return it;
+      });
+
+      const writer = this.port.writable!.getWriter();
+      try {
+        await writer.write(new TextEncoder().encode(`RST OTA\r\n`));
+        serialLog.update((it) => {
+          it.push({
+            type: "input",
+            value: "RST OTA",
+          });
+          return it;
+        });
+      } finally {
+        writer.releaseLock();
+      }
+
+      // Wait for the device to be ready
+      const signal = await this.reader.read();
+      serialLog.update((it) => {
+        it.push({
+          type: "output",
+          value: signal.value!.trim(),
+        });
+        return it;
+      });
+
+      await file.stream().pipeTo(this.port.writable!);
+
+      serialLog.update((it) => {
+        it.push({
+          type: "input",
+          value: `...${file.size} bytes`,
+        });
+        return it;
+      });
+
+      const result = (await this.reader.read()).value!.trim();
+      serialLog.update((it) => {
+        it.push({
+          type: "output",
+          value: result!,
+        });
+        return it;
+      });
+
+      await this.suspend();
+
+      if (result !== "OTA OK") {
+        throw new Error(result);
+      }
+    } finally {
+      delete this.lock;
+      resolveLock!(true);
+    }
   }
 }
diff --git a/src/routes/(app)/ota-update/OTA.svelte b/src/routes/(app)/ota-update/OTA.svelte
new file mode 100644
index 00000000..e69de29b
diff --git a/src/routes/(app)/ota-update/[device]/[version]/+page.svelte b/src/routes/(app)/ota-update/[device]/[version]/+page.svelte
index dde33acd..97e7428a 100644
--- a/src/routes/(app)/ota-update/[device]/[version]/+page.svelte
+++ b/src/routes/(app)/ota-update/[device]/[version]/+page.svelte
@@ -4,6 +4,29 @@
 
   let { data } = $props();
 
+  let working = $state(false);
+  let success = $state(false);
+  let error = $state<Error | undefined>(undefined);
+
+  async function update() {
+    working = true;
+    error = undefined;
+    success = false;
+    const port = $serialPort!;
+    $serialPort = undefined;
+    try {
+      const file = await fetch(otaUrl!).then((it) => it.blob());
+
+      await port.updateFirmware(file);
+
+      success = true;
+    } catch (e) {
+      error = e as Error;
+    } finally {
+      working = false;
+    }
+  }
+
   let currentDevice = $derived(
     $serialPort
       ? `${$serialPort.device.toLowerCase()}_${$serialPort.chipset.toLowerCase()}`
@@ -78,7 +101,29 @@
   <section>
     <h3>OTA Upate</h3>
     {#if data.ota}
-      <p>OTA update</p>
+      <button
+        class:working
+        class:primary={!error}
+        class:error={error || (!success && isCorrectDevice === false)}
+        disabled={working || $serialPort === undefined || !isCorrectDevice}
+        onclick={update}>Apply Update</button
+      >
+      {#if $serialPort}
+        <div transition:slide>
+          Your device is ready and compatible. Click the button to perform the
+          update.
+        </div>
+      {:else if success}
+        <div class="primary" transition:slide>Update successful</div>
+      {:else if error}
+        <div class="error" transition:slide>{error.message}</div>
+      {:else if working}
+        <div class="primary" transition:slide>Updating your device...</div>
+      {:else}
+        <div class="primary" transition:slide>
+          Connect your device to continue
+        </div>
+      {/if}
     {:else}
       <em>There are no OTA files for this device.</em>
     {/if}
@@ -101,6 +146,7 @@
     <h4>Via Serial</h4>
     <p>WIP</p>
   </section>
+  ading 0 Chordmaps.
 </div>
 
 <style lang="scss">
@@ -109,6 +155,84 @@
     transition: color 200ms ease;
   }
 
+  .error {
+    color: var(--md-sys-color-error);
+  }
+
+  .primary {
+    color: var(--md-sys-color-primary);
+  }
+
+  @keyframes rotate {
+    0% {
+      transform: rotate(120deg);
+      opacity: 0;
+    }
+
+    20% {
+      transform: rotate(120deg);
+      opacity: 0;
+    }
+
+    60% {
+      opacity: 1;
+    }
+
+    100% {
+      transform: rotate(270deg);
+      opacity: 0;
+    }
+  }
+
+  button {
+    overflow: hidden;
+    position: relative;
+    height: 42px;
+
+    border: 2px solid currentcolor;
+    border-radius: 8px;
+
+    outline: 2px dashed currentcolor;
+    outline-offset: 4px;
+
+    background: var(--md-sys-color-background);
+    transition:
+      border 200ms ease,
+      color 200ms ease;
+
+    margin: 6px;
+    margin-block: 16px;
+
+    &.primary {
+      color: var(--md-sys-color-primary);
+      background: none;
+    }
+
+    &.working {
+      border-color: transparent;
+    }
+
+    &.working::before {
+      z-index: -1;
+      position: absolute;
+      background: var(--md-sys-color-background);
+      width: calc(100% - 4px);
+      height: calc(100% - 4px);
+      border-radius: 8px;
+      content: "";
+    }
+
+    &.working::after {
+      z-index: -2;
+      position: absolute;
+      content: "";
+      background: var(--md-sys-color-primary);
+      animation: rotate 1s ease-out forwards infinite;
+      height: 30%;
+      width: 120%;
+    }
+  }
+
   hr {
     color: var(--md-sys-color-outline);
     margin-block: 3em;