Better buffer transforms

Author: thegecko

src/services/device-information.ts

@@ -115,8 +115,8 @@ export class DeviceInformationService {
     private async readStringCharacteristic(uuid: BluetoothCharacteristicUUID): Promise<string | undefined> {
         try {
             const view = await this.helper.getCharacteristicValue(uuid);
-            const buffer = view.buffer.slice(view.byteOffset, view.byteOffset + view.byteLength);
-            return String.fromCharCode.apply(null, Array.from(new Uint8Array(buffer)));
+            const decoder = new TextDecoder();
+            return decoder.decode(view.buffer);
         } catch (_e) {
             return undefined;
         }

src/services/led.ts

@@ -73,7 +73,7 @@ export class LedService {
 
     /**
      * Write text to the LED matrix
-     * @param text Te text to display
+     * @param text The text to display
      */
     public async writeText(text: string): Promise<void> {
         const encoded = this.encodeString(text);
@@ -116,12 +116,8 @@ export class LedService {
     }
 
     private encodeString(text: string): ArrayBuffer {
-        const buffer = new ArrayBuffer(text.length);
-        const view = new Uint8Array(buffer);
-        for (let i = 0; i < text.length; i++) {
-            view[i] = text.charCodeAt(i);
-        }
-        return buffer;
+        const encoder = new TextEncoder();
+        return encoder.encode(text);
     }
 
     private viewToLedMatrix(view: DataView): LedMatrix {