First attemp to try to make usb-serial working in Capacitor

android/app/capacitor.build.gradle

@@ -9,7 +9,7 @@ android {
 
 apply from: "../capacitor-cordova-android-plugins/cordova.variables.gradle"
 dependencies {
-
+    implementation project(':usb-serial-plugin')
 
 }
 

android/build.gradle

@@ -5,6 +5,9 @@ buildscript {
     repositories {
         google()
         mavenCentral()
+        maven {
+            url "https://maven.scijava.org/content/repositories/public/"
+        }
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:8.4.0'
@@ -21,6 +24,9 @@ allprojects {
     repositories {
         google()
         mavenCentral()
+        maven {
+            url "https://maven.scijava.org/content/repositories/public/"
+        }
     }
 }
 

android/capacitor.settings.gradle

@@ -1,3 +1,6 @@
 // DO NOT EDIT THIS FILE! IT IS GENERATED EACH TIME "capacitor update" IS RUN
 include ':capacitor-android'
 project(':capacitor-android').projectDir = new File('../node_modules/@capacitor/android/capacitor')
+
+include ':usb-serial-plugin'
+project(':usb-serial-plugin').projectDir = new File('../node_modules/usb-serial-plugin/android')

package.json

@@ -58,6 +58,7 @@
     "short-unique-id": "^4.4.4",
     "switchery-latest": "^0.8.2",
     "three": "~0.97.0",
+    "usb-serial-plugin": "^0.0.9",
     "vite-plugin-pwa": "^0.17.4",
     "vue": "^2.7.10"
   },

src/js/webSerial.js

@@ -1,4 +1,6 @@
 import { webSerialDevices } from "./serial_devices";
+import { UsbSerial } from "usb-serial-plugin";
+import { Capacitor } from "@capacitor/core";
 
 async function* streamAsyncIterable(reader, keepReadingFlag) {
     try {
@@ -49,9 +51,18 @@ class WebSerial extends EventTarget {
 
     async connect(options) {
         this.openRequested = true;
-        this.port = await navigator.serial.requestPort({
-            filters: webSerialDevices,
-        });
+        // TODO this is only a fast way to try to see if it works, there are better ways to do it
+        if (Capacitor.isNativePlatform()) {
+            const usbDevices = await UsbSerial.connectedDevices();
+            if (usbDevices.length > 0) {
+                this.port = usbDevices[0];
+                UsbSerial.open( { device: usbDevices[0].device, baudRate: options.baudRate } );
+            }
+        } else {
+            this.port = await navigator.serial.requestPort({
+                filters: webSerialDevices,
+            });
+        }
 
         await this.port.open(options);
         const connectionInfo = this.port.getInfo();

yarn.lock

@@ -11962,6 +11962,11 @@ url@^0.11.0:
     punycode "^1.4.1"
     qs "^6.11.2"
 
+usb-serial-plugin@^0.0.9:
+  version "0.0.9"
+  resolved "https://registry.yarnpkg.com/usb-serial-plugin/-/usb-serial-plugin-0.0.9.tgz#7441423072b9f08894c289bded9ff884b682b120"
+  integrity sha512-pmjhRU+1Mf8zvsI1ThoL4RVIDH11+gFWQACunSwN1txFbnIj4ZzTtIRlaQKAoMyzII1wLKsXbNIcAFDrcPwOuQ==
+
 use@^3.1.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"