add WriteBytes

types/index.d.ts

@@ -242,6 +242,15 @@ interface RNSerialportStatic {
    */
   disconnect(): void;
 
+  /**
+   * Writes bytes to port
+   *
+   * @param {ArrayBuffer} data
+   * @memberof RNSerialportStatic
+   */
+  writeBytes(data: ArrayBuffer );
+
+
   /**
    * Writes string to port
    *