Allow configuring improv timeout (#139)

index.html

@@ -362,12 +362,22 @@
       </p>
       <p>
         By default a new installation will erase all data before installation.
-        If you want to leave this choice to the user, set the optional key
+        If you want to leave this choice to the user, set the optional manifest
+        key
         <code>new_install_prompt_erase</code> to <code>true</code>. ESP Web
         Tools offers users a new installation if it is unable to detect the
         current firmware of the device (via Improv Serial) or if the detected
         firmware does not match the name specififed in the manifest.
       </p>
+      <p>
+        When a firmware is first installed on a device, it might need to do some
+        time consuming tasks like initializing the file system. By default ESP
+        Web Tools will wait 10 seconds to receive an Improv Serial response to
+        indicate that the boot is completed. You can increase this timeout by
+        setting the optional manifest key
+        <code>new_install_improv_wait_time</code> to the number of seconds to
+        wait. Set to <code>0</code> to disable Improv Serial detection.
+      </p>
       <h2 id="improv">Configuring Wi-Fi</h2>
       <p>
         ESP Web Tools supports the

src/const.ts

@@ -19,6 +19,8 @@ export interface Manifest {
   /** @deprecated use `new_install_prompt_erase` instead */
   new_install_skip_erase?: boolean;
   new_install_prompt_erase?: boolean;
+  /* Time to wait to detect Improv Wi-Fi. Set to 0 to disable. */
+  new_install_improv_wait_time?: number;
   builds: Build[];
 }
 

src/install-dialog.ts

@@ -661,18 +661,25 @@ class EwtInstallDialog extends LitElement {
     }
   }
 
-  private async _fetchManifest() {
-    if (this._manifest) {
-      return;
+  private async _initialize(justInstalled = false) {
+    if (this.port.readable === null || this.port.writable === null) {
+      this._state = "ERROR";
+      this._error =
+        "Serial port is not readable/writable. Close any other application using it and try again.";
     }
 
     const manifestURL = new URL(
       this.manifestPath,
       location.toString()
     ).toString();
+    try {
       this._manifest = await fetch(manifestURL).then(
         (resp): Promise<Manifest> => resp.json()
       );
+    } catch (err: any) {
+      this._state = "ERROR";
+      this._error = "Failed to download manifest";
+    }
     if ("new_install_skip_erase" in this._manifest) {
       console.warn(
         'Manifest option "new_install_skip_erase" is deprecated. Use "new_install_prompt_erase" instead.'
@@ -681,26 +688,25 @@ class EwtInstallDialog extends LitElement {
         this._manifest.new_install_prompt_erase = true;
       }
     }
-  }
 
-  private async _initialize(justErased = false) {
-    if (this.port.readable === null || this.port.writable === null) {
-      this._state = "ERROR";
-      this._error =
-        "Serial port is not readable/writable. Close any other application using it and try again.";
+    if (this._manifest.new_install_improv_wait_time === 0) {
+      this._client = null;
+      return;
     }
 
-    const manifestProm = this._fetchManifest();
-
     const client = new ImprovSerial(this.port!, this.logger);
     client.addEventListener("state-changed", () => {
       this.requestUpdate();
     });
     client.addEventListener("error-changed", () => this.requestUpdate());
     try {
-      // If a device was just erased, the new firmware might need some time to
-      // format the rest of the flash.
-      const timeout = justErased ? 10000 : 1000;
+      // If a device was just installed, give new firmware 10 seconds (overridable) to
+      // format the rest of the flash and do other stuff.
+      const timeout = !justInstalled
+        ? 1000
+        : this._manifest.new_install_improv_wait_time !== undefined
+        ? this._manifest.new_install_improv_wait_time
+        : 10000;
       this._info = await client.initialize(timeout);
       this._client = client;
       client.addEventListener("disconnect", this._handleDisconnect);
@@ -716,13 +722,6 @@ class EwtInstallDialog extends LitElement {
         this.logger.error("Improv initialization failed.", err);
       }
     }
-
-    try {
-      await manifestProm;
-    } catch (err: any) {
-      this._state = "ERROR";
-      this._error = "Failed to download manifest";
-    }
   }
 
   private _startInstall(erase: boolean) {
@@ -745,7 +744,7 @@ class EwtInstallDialog extends LitElement {
 
         if (state.state === FlashStateType.FINISHED) {
           sleep(100)
-            .then(() => this._initialize(this._installErase))
+            .then(() => this._initialize(true))
             .then(() => this.requestUpdate());
         }
       },