chore: update dependencies (#42)

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "coffee-scale-app",
-  "version": "2.1.3",
+	"version": "2.2.0",
 	"license": "MIT",
 	"private": true,
 	"scripts": {
@@ -14,7 +14,7 @@
 	},
 	"devDependencies": {
 		"@biomejs/biome": "^1.5.3",
-		"@iconify-json/mingcute": "^1.1.15",
+		"@iconify-json/mingcute": "^1.1.16",
 		"@macfja/svelte-persistent-store": "^2.4.1",
 		"@sveltejs/adapter-static": "^3.0.1",
 		"@sveltejs/kit": "^2.5.0",
@@ -30,7 +30,7 @@
 		"tailwindcss": "^3.4.1",
 		"tslib": "^2.6.2",
 		"typescript": "^5.3.3",
-		"unplugin-icons": "^0.18.3",
+		"unplugin-icons": "^0.18.4",
 		"vite": "^5.0.12"
 	},
 	"type": "module",

src/lib/bt.ts

@@ -3,13 +3,16 @@ import { get } from 'svelte/store'
 import { batteryLevel, btConnected, btEnabled, btServer, currentWeight, recordWeight, wakeLock } from './stores'
 
 let weightCharacteristic: BluetoothRemoteGATTCharacteristic | null = null
+
+// check if the scale is using the new rust firmware which uses a int32 for the weight
 let newFirmware = false
 
 async function onWeightUpdate(event: Event) {
 	if (event.target === null) {
 		return
 	}
 	const dataView = (event.target as BluetoothRemoteGATTCharacteristic).value
+	// get the value as a int16 or int32 depending on the firmware
 	const value = (newFirmware ? dataView?.getInt32(0, false) : dataView?.getInt16(0, false)) ?? 0
 	currentWeight.set(value / 100.0)
 	await recordWeight()
@@ -37,6 +40,10 @@ export async function connectBt() {
 	if (!browser) {
 		return
 	}
+	// Support both the old python firmware (with device name `mpy-coffe`) and the new rust firmware (with device name
+	// `coffee-scale`.
+	// The new firmware uses a more appropriate service and characteristic UUIDs, so we can use those to identify the
+	// firmware version.
 	const device = await navigator.bluetooth.requestDevice({
 		filters: [
 			{ name: 'mpy-coffee' },
@@ -54,6 +61,7 @@ export async function connectBt() {
 	btConnected.set(true)
 	btServer.set(server ?? null)
 
+	// Detect firmware version
 	try {
 		// python firmware
 		const service = await server?.getPrimaryService(parseInt('0x1815'))
@@ -69,6 +77,7 @@ export async function connectBt() {
 	weightCharacteristic?.addEventListener('characteristicvaluechanged', onWeightUpdate)
 
 	await readBatteryLevel()
+	// Request a wake lock to keep the screen on while the scale is connected
 	if ('wakeLock' in navigator) {
 		try {
 			wakeLock.set(await navigator.wakeLock.request('screen'))