diff --git a/docs/documents/niimbot_hardware_interfacing.md b/docs/documents/niimbot_hardware_interfacing.md
index 383456f..1ae41ae 100644
--- a/docs/documents/niimbot_hardware_interfacing.md
+++ b/docs/documents/niimbot_hardware_interfacing.md
@@ -2,7 +2,7 @@
 title: NIIMBOT hardware interfacing
 ---
 
-# Hardware interfacing
+# NIIMBOT hardware interfacing
 
 ## Bluetooth
 
@@ -10,7 +10,7 @@ NIIMBOT printers have two bluetooth addresses.
 
 In case of D110 :
 
-* `26:03:03:c3:f9:11` - low energy
+* `26:03:03:C3:F9:11` - low energy
 * `03:26:03:C3:F9:11` - classic
 
 ### Bluetooth Low Energy
@@ -19,7 +19,7 @@ You can interact with printer through a specific BLE characteristic.
 To find what characteristic is suitable for this:
 
 1. Find services which have UUID length > 4.
-2. Find characteristic in these services which have `NOTIFY` and `WRITE_WITHOUT_RESPONSE` properties.
+2. Find characteristic in these services which have `NOTIFY` and `WRITE_NO_RESPONSE` properties.
 
    ![](proto/characteristic.png)
 
@@ -32,10 +32,14 @@ To send data, write a value without response.
 
 ### Bluetooth Classic
 
-Use bluetooth serial.
+Use bluetooth serial. The only problem is that packets may be fragmented.
 
-## Serial (USB)
+For example, packet `5555d9091f90044c000001000016aaaa` can be received as `5555d9091f90044c000001000016` `aaaa`.
 
-Packet format is same as Bluetooth. The only problem is that packets may be fragmented.
+Android [Serial Bluetooth Terminal](https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal) test:
 
-For example, packet `5555d9091f90044c000001000016aaaa` can be received as `5555d9091f90044c000001000016` `aaaa`.
+![](proto/bluetooh_terminal.jpg)
+
+## Serial (USB)
+
+Packet format is same as Bluetooth. Packets may be fragmented.
diff --git a/docs/documents/niimbot_proto.md b/docs/documents/niimbot_proto.md
index b7dddcb..f7bc776 100644
--- a/docs/documents/niimbot_proto.md
+++ b/docs/documents/niimbot_proto.md
@@ -53,3 +53,10 @@ WIP
 | 0xdc | Heartbeat | 0xde, 0xdf, 0xdd, 0xd9 |
 | 0xe3 | PageEnd | 0xe4 |
 | 0xf3 | PrintEnd | 0xf4 |
+
+## Packets example
+
+* `55 55 40 01 0b 4a aa aa` - get device serial number
+* `55 55 1a 01 01 1a aa aa` - get rfid data
+* `55 55 58 03 01 01 01 5a aa aa` - enable Bluetooth connection sound
+* `55 55 58 03 01 01 00 5b aa aa` - disable Bluetooth connection sound
diff --git a/docs/documents/proto/bluetooh_terminal.jpg b/docs/documents/proto/bluetooh_terminal.jpg
new file mode 100644
index 0000000..07d32f5
Binary files /dev/null and b/docs/documents/proto/bluetooh_terminal.jpg differ
diff --git a/src/client/bluetooth_impl.ts b/src/client/bluetooth_impl.ts
index fbc7c2f..194f1e7 100644
--- a/src/client/bluetooth_impl.ts
+++ b/src/client/bluetooth_impl.ts
@@ -27,7 +27,11 @@ class BleConfiguration {
   ];
 }
 
-/** Uses Web Bluetooth API */
+/**
+ * Uses [Web Bluetooth API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Bluetooth_API)
+ *
+ * @category Client
+ */
 export class NiimbotBluetoothClient extends NiimbotAbstractClient {
   private gattServer?: BluetoothRemoteGATTServer = undefined;
   private channel?: BluetoothRemoteGATTCharacteristic = undefined;
diff --git a/src/client/index.ts b/src/client/index.ts
index dde9d55..3315675 100644
--- a/src/client/index.ts
+++ b/src/client/index.ts
@@ -14,6 +14,8 @@ import { findPrintTask, PrintTaskName } from "../print_tasks";
 
 /**
  * Represents the connection result information.
+ *
+ * @category Client
  */
 export type ConnectionInfo = {
   deviceName?: string;
@@ -22,6 +24,8 @@ export type ConnectionInfo = {
 
 /**
  * Interface representing printer information.
+ *
+ * @category Client
  */
 export interface PrinterInfo {
   connectResult?: ConnectResult;
@@ -40,6 +44,8 @@ export interface PrinterInfo {
 /**
  * Abstract class representing a client with common functionality for interacting with a printer.
  * Hardware interface must be defined after extending this class.
+ *
+ * @category Client
  */
 export abstract class NiimbotAbstractClient extends EventEmitter<ClientEventMap> {
   public readonly abstraction: Abstraction;
diff --git a/src/client/serial_impl.ts b/src/client/serial_impl.ts
index e315372..0fdd5ea 100644
--- a/src/client/serial_impl.ts
+++ b/src/client/serial_impl.ts
@@ -11,7 +11,11 @@ import { NiimbotPacket } from "../packets/packet";
 import { ConnectResult, PrinterErrorCode, PrintError, ResponseCommandId } from "../packets";
 import { Utils, Validators } from "../utils";
 
-/** Uses Web Serial API */
+/**
+ * Uses [Web Serial API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Serial_API)
+ *
+ * @category Client
+ **/
 export class NiimbotSerialClient extends NiimbotAbstractClient {
   private port?: SerialPort = undefined;
   private writer?: WritableStreamDefaultWriter<Uint8Array> = undefined;
diff --git a/src/events.ts b/src/events.ts
index 700e24a..758bb18 100644
--- a/src/events.ts
+++ b/src/events.ts
@@ -1,6 +1,9 @@
 import { ConnectionInfo, PrinterInfo, NiimbotAbstractClient, AbstractPrintTask, HeartbeatData, NiimbotPacket } from ".";
 
-/** Base client event */
+/**
+ * Base client event
+ * @category Events
+ */
 export class NiimbotEvent {
   readonly type: string;
 
@@ -9,7 +12,10 @@ export class NiimbotEvent {
   }
 }
 
-/** Fired when client connected to printer and fetched it's information. */
+/**
+ * Fired when client connected to printer and fetched it's information.
+ * @category Events
+ */
 export class ConnectEvent extends NiimbotEvent {
   info: ConnectionInfo;
   constructor(info: ConnectionInfo) {
@@ -18,14 +24,20 @@ export class ConnectEvent extends NiimbotEvent {
   }
 }
 
-/** Fired when client disconnected from printer. */
+/**
+ * Fired when client disconnected from printer.
+ * @category Events
+ */
 export class DisconnectEvent extends NiimbotEvent {
   constructor() {
     super("disconnect");
   }
 }
 
-/** Fired when packet received, converted to object and validated (head, tail, checksum). */
+/**
+ * Fired when packet received, converted to object and validated (head, tail, checksum).
+ * @category Events
+ */
 export class PacketReceivedEvent extends NiimbotEvent {
   packet: NiimbotPacket;
   constructor(packet: NiimbotPacket) {
@@ -34,7 +46,10 @@ export class PacketReceivedEvent extends NiimbotEvent {
   }
 }
 
-/** Fired when packet object sent. */
+/**
+ * Fired when packet object sent.
+ * @category Events
+ */
 export class PacketSentEvent extends NiimbotEvent {
   packet: NiimbotPacket;
   constructor(packet: NiimbotPacket) {
@@ -43,7 +58,10 @@ export class PacketSentEvent extends NiimbotEvent {
   }
 }
 
-/** Fired when raw packet sent to printer. */
+/**
+ * Fired when raw packet sent to printer.
+ * @category Events
+ */
 export class RawPacketSentEvent extends NiimbotEvent {
   data: Uint8Array;
   constructor(data: Uint8Array) {
@@ -52,7 +70,10 @@ export class RawPacketSentEvent extends NiimbotEvent {
   }
 }
 
-/** Fired when raw packet received from printer. */
+/**
+ * Fired when raw packet received from printer.
+ * @category Events
+ */
 export class RawPacketReceivedEvent extends NiimbotEvent {
   data: Uint8Array;
   constructor(data: Uint8Array) {
@@ -61,7 +82,10 @@ export class RawPacketReceivedEvent extends NiimbotEvent {
   }
 }
 
-/** Fired when heartbeat packet received and parsed. */
+/**
+ * Fired when heartbeat packet received and parsed.
+ * @category Events
+ */
 export class HeartbeatEvent extends NiimbotEvent {
   data: HeartbeatData;
   constructor(data: HeartbeatData) {
@@ -70,7 +94,10 @@ export class HeartbeatEvent extends NiimbotEvent {
   }
 }
 
-/** Fired when no response received after heartbeat packet sent. */
+/**
+ * Fired when no response received after heartbeat packet sent.
+ * @category Events
+ */
 export class HeartbeatFailedEvent extends NiimbotEvent {
   failedAttempts: number;
   constructor(failedAttempts: number) {
@@ -79,7 +106,10 @@ export class HeartbeatFailedEvent extends NiimbotEvent {
   }
 }
 
-/** Fired when info fetched from printer (after {@link NiimbotAbstractClient.fetchPrinterInfo} finished). */
+/**
+ * Fired when info fetched from printer (after {@link NiimbotAbstractClient.fetchPrinterInfo} finished).
+ * @category Events
+ */
 export class PrinterInfoFetchedEvent extends NiimbotEvent {
   info: PrinterInfo;
   constructor(info: PrinterInfo) {
@@ -88,7 +118,10 @@ export class PrinterInfoFetchedEvent extends NiimbotEvent {
   }
 }
 
-/** Fired progress received (during {@link AbstractPrintTask.waitForFinished}). */
+/**
+ * Fired progress received (during {@link AbstractPrintTask.waitForFinished}).
+ * @category Events
+ */
 export class PrintProgressEvent extends NiimbotEvent {
   /** 0 – n */
   page: number;
@@ -108,6 +141,10 @@ export class PrintProgressEvent extends NiimbotEvent {
   }
 }
 
+/**
+ * Event list for {@link NiimbotAbstractClient}.
+ * @category Events
+ */
 export type ClientEventMap = {
   connect: (event: ConnectEvent) => void;
   disconnect: (event: DisconnectEvent) => void;
diff --git a/src/image_encoder.ts b/src/image_encoder.ts
index 8a3c661..8ed641a 100644
--- a/src/image_encoder.ts
+++ b/src/image_encoder.ts
@@ -1,5 +1,6 @@
 import { Utils } from ".";
 
+/** @category Image encoder */
 export type ImageRow = {
   dataType: "void" | "pixels";
   rowNumber: number;
@@ -8,14 +9,20 @@ export type ImageRow = {
   rowData?: Uint8Array;
 };
 
+/** @category Image encoder */
 export type EncodedImage = {
   cols: number;
   rows: number;
   rowsData: ImageRow[];
 };
 
+/** @category Image encoder */
 export type PrintDirection = "left" | "top";
 
+/**
+ * @category Helpers
+ * @category Image encoder
+ */
 export class ImageEncoder {
   /** printDirection = "left" rotates image for 90 degrees clockwise */
   public static encodeCanvas(canvas: HTMLCanvasElement, printDirection: PrintDirection = "left"): EncodedImage {
diff --git a/src/index.ts b/src/index.ts
index 619dcf1..44fb540 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,7 @@
+/**
+ * @module API
+ */
+
 export * from "./client";
 export * from "./packets";
 export * from "./events";
diff --git a/src/packets/abstraction.ts b/src/packets/abstraction.ts
index e7a249e..e30638b 100644
--- a/src/packets/abstraction.ts
+++ b/src/packets/abstraction.ts
@@ -18,6 +18,9 @@ import { SequentialDataReader } from "./data_reader";
 import { NiimbotPacket } from "./packet";
 import { PacketGenerator } from "./packet_generator";
 
+/**
+ * @category Packets
+ */
 export class PrintError extends Error {
   public readonly reasonId: number;
 
@@ -27,6 +30,9 @@ export class PrintError extends Error {
   }
 }
 
+/**
+ * @category Packets
+ */
 export interface PrintStatus {
   /** 0 – n */
   page: number;
@@ -35,7 +41,9 @@ export interface PrintStatus {
   /** 0 – 100 */
   pageFeedProgress: number;
 }
-
+/**
+ * @category Packets
+ */
 export interface RfidInfo {
   tagPresent: boolean;
   uuid: string;
@@ -46,7 +54,9 @@ export interface RfidInfo {
   consumablesType: LabelType;
 }
 
-/** closingState inverted on some printers */
+/**
+ * @category Packets
+ **/
 export interface HeartbeatData {
   paperState: number;
   rfidReadState: number;
@@ -54,18 +64,28 @@ export interface HeartbeatData {
   powerLevel: BatteryChargeLevel;
 }
 
+/**
+ * @category Packets
+ */
 export interface SoundSettings {
   category: SoundSettingsType;
   item: SoundSettingsItemType;
   value: boolean;
 }
 
+/**
+ * @category Packets
+ */
 export interface PrinterStatusData {
   supportColor: number;
   protocolVersion: number;
 }
 
-/** Not sure for name. */
+/**
+ * Packet sender and parser.
+ *
+ * @category Packets
+ */
 export class Abstraction {
   private readonly DEFAULT_PACKET_TIMEOUT: number = 1_000;
   private client: NiimbotAbstractClient;
diff --git a/src/packets/commands.ts b/src/packets/commands.ts
index a9f2f52..ba9628f 100644
--- a/src/packets/commands.ts
+++ b/src/packets/commands.ts
@@ -1,4 +1,8 @@
-/** Commands IDs from client to printer */
+/**
+ * Commands IDs from client to printer
+ *
+ * @category Packets
+ **/
 export enum RequestCommandId {
   Invalid = -1,
   /** Entire packet should be prefixed with 0x03 */
@@ -39,7 +43,11 @@ export enum RequestCommandId {
   PrintTestPage = 0x5a,
 }
 
-/** Commands IDs from printer to client */
+/**
+ * Commands IDs from printer to client
+ *
+ * @category Packets
+ **/
 export enum ResponseCommandId {
   Invalid = -1,
   In_NotSupported = 0x00,
@@ -95,7 +103,11 @@ export enum ResponseCommandId {
 import TX = RequestCommandId;
 import RX = ResponseCommandId;
 
-/** Map request id to response id. null meant no response expected (one way). */
+/**
+ * Map request id to response id. null meant no response expected (one way).
+ *
+ * @category Packets
+ **/
 export const commandsMap: Record<RequestCommandId, ResponseCommandId[] | null> = {
   [TX.Invalid]: null,
   [TX.PrintBitmapRow]: null,
diff --git a/src/packets/data_reader.ts b/src/packets/data_reader.ts
index c3b0bde..9f8cf81 100644
--- a/src/packets/data_reader.ts
+++ b/src/packets/data_reader.ts
@@ -1,6 +1,10 @@
 import { Utils } from "../utils";
 
-/** Utility class to sequentially fetch data from byte array. EOF checks included.  */
+/**
+ * Utility class to sequentially fetch data from byte array. EOF checks included.
+ *
+ * @category Packets
+ **/
 export class SequentialDataReader {
   private bytes: Uint8Array;
   private offset: number;
diff --git a/src/packets/packet.ts b/src/packets/packet.ts
index 2081ca6..b8daf50 100644
--- a/src/packets/packet.ts
+++ b/src/packets/packet.ts
@@ -1,6 +1,11 @@
 import { Validators } from "../utils";
 import { RequestCommandId, ResponseCommandId } from ".";
 
+/**
+ * NIIMBOT packet object
+ * 
+ * @category Packets
+ */
 export class NiimbotPacket {
   public static readonly HEAD = new Uint8Array([0x55, 0x55]);
   public static readonly TAIL = new Uint8Array([0xaa, 0xaa]);
diff --git a/src/packets/packet_generator.ts b/src/packets/packet_generator.ts
index 31364a3..e1b6a3c 100644
--- a/src/packets/packet_generator.ts
+++ b/src/packets/packet_generator.ts
@@ -14,6 +14,7 @@ import { Utils } from "../utils";
 
 /**
  * A helper class that generates various types of packets.
+ * @category Packets
  */
 export class PacketGenerator {
   /**
diff --git a/src/packets/payloads.ts b/src/packets/payloads.ts
index d75f9a0..90f09dd 100644
--- a/src/packets/payloads.ts
+++ b/src/packets/payloads.ts
@@ -1,7 +1,10 @@
 import { modelsLibrary } from "../printer_models";
 import { RequestCommandId, ResponseCommandId } from "./commands";
 
-/** Sent with {@link RequestCommandId.PrinterInfo} */
+/**
+ * Sent with {@link RequestCommandId.PrinterInfo}
+ * @category Packets
+ **/
 export enum PrinterInfoType {
   Density = 1,
   Speed = 2,
@@ -19,17 +22,23 @@ export enum PrinterInfoType {
   Area = 15,
 }
 
+/** @category Packets */
 export enum SoundSettingsType {
   SetSound = 0x01,
   GetSoundState = 0x02,
 }
 
+/** @category Packets */
 export enum SoundSettingsItemType {
   BluetoothConnectionSound = 0x01,
   PowerSound = 0x02,
 }
 
-/** Sent with {@link RequestCommandId.SetLabelType}. */
+/**
+ * Sent with {@link RequestCommandId.SetLabelType}.
+ *
+ * @category Packets
+ **/
 export enum LabelType {
   Invalid = 0,
   /** Default for most of label printers */
@@ -43,6 +52,7 @@ export enum LabelType {
   HeatShrinkTube = 11,
 }
 
+/** @category Packets */
 export enum HeartbeatType {
   Advanced1 = 1,
   Basic = 2,
@@ -50,6 +60,7 @@ export enum HeartbeatType {
   Advanced2 = 4,
 }
 
+/** @category Packets */
 export enum AutoShutdownTime {
   /** Usually 15 minutes. */
   ShutdownTime1 = 1,
@@ -61,7 +72,10 @@ export enum AutoShutdownTime {
   ShutdownTime4 = 4,
 }
 
-/** Battery charge level */
+/**
+ * Battery charge level
+ * @category Packets
+ **/
 export enum BatteryChargeLevel {
   Charge0 = 0,
   Charge25 = 1,
@@ -70,7 +84,10 @@ export enum BatteryChargeLevel {
   Charge100 = 4,
 }
 
-/** {@link ResponseCommandId.In_Connect} status codes. */
+/**
+ * {@link ResponseCommandId.In_Connect} status codes.
+ * @category Packets
+ **/
 export enum ConnectResult {
   Disconnect = 0,
   Connected = 1,
@@ -79,9 +96,13 @@ export enum ConnectResult {
   FirmwareErrors = 90,
 }
 
-/** {@link ResponseCommandId.In_PrintError} status codes. */
+/**
+ * {@link ResponseCommandId.In_PrintError} status codes.
+ * @category Packets
+ **/
 export enum PrinterErrorCode {
   CoverOpen = 0x01,
+  /** No paper */
   LackPaper = 0x02,
   LowBattery = 0x03,
   BatteryException = 0x04,
diff --git a/src/print_tasks/AbstractPrintTask.ts b/src/print_tasks/AbstractPrintTask.ts
index 0f53ce8..f78909b 100644
--- a/src/print_tasks/AbstractPrintTask.ts
+++ b/src/print_tasks/AbstractPrintTask.ts
@@ -2,7 +2,10 @@ import { EncodedImage } from "../image_encoder";
 import { LabelType } from "../packets";
 import { Abstraction } from "../packets/abstraction";
 
-/** Print options for print tasks. */
+/**
+ * Print options for print tasks.
+ * @category Print tasks
+ */
 export type PrintOptions = {
   /** Printer label type */
   labelType: LabelType;
@@ -54,6 +57,8 @@ const printOptionsDefaults: PrintOptions = {
  *   await client.abstraction.printEnd();
  * }
  * ```
+ *
+ * @category Print tasks
  **/
 export abstract class AbstractPrintTask {
   protected abstraction: Abstraction;
diff --git a/src/print_tasks/B1PrintTask.ts b/src/print_tasks/B1PrintTask.ts
index c885303..626b14b 100644
--- a/src/print_tasks/B1PrintTask.ts
+++ b/src/print_tasks/B1PrintTask.ts
@@ -2,6 +2,9 @@ import { EncodedImage } from "../image_encoder";
 import { PacketGenerator } from "../packets";
 import { AbstractPrintTask } from "./AbstractPrintTask";
 
+/**
+ * @category Print tasks
+ */
 export class B1PrintTask extends AbstractPrintTask {
   override printInit(): Promise<void> {
     return this.abstraction.sendAll([
diff --git a/src/print_tasks/B21V1PrintTask.ts b/src/print_tasks/B21V1PrintTask.ts
index b6323b9..4076a32 100644
--- a/src/print_tasks/B21V1PrintTask.ts
+++ b/src/print_tasks/B21V1PrintTask.ts
@@ -2,6 +2,9 @@ import { EncodedImage } from "../image_encoder";
 import { PacketGenerator } from "../packets";
 import { AbstractPrintTask } from "./AbstractPrintTask";
 
+/**
+ * @category Print tasks
+ */
 export class B21V1PrintTask extends AbstractPrintTask {
   override printInit(): Promise<void> {
     return this.abstraction.sendAll([
diff --git a/src/print_tasks/D110PrintTask.ts b/src/print_tasks/D110PrintTask.ts
index e782096..03c9080 100644
--- a/src/print_tasks/D110PrintTask.ts
+++ b/src/print_tasks/D110PrintTask.ts
@@ -2,6 +2,9 @@ import { EncodedImage } from "../image_encoder";
 import { PacketGenerator } from "../packets";
 import { AbstractPrintTask } from "./AbstractPrintTask";
 
+/**
+ * @category Print tasks
+ */
 export class D110PrintTask extends AbstractPrintTask {
   override printInit(): Promise<void> {
     return this.abstraction.sendAll([
diff --git a/src/print_tasks/OldD11PrintTask.ts b/src/print_tasks/OldD11PrintTask.ts
index 1102416..7a21e83 100644
--- a/src/print_tasks/OldD11PrintTask.ts
+++ b/src/print_tasks/OldD11PrintTask.ts
@@ -2,6 +2,9 @@ import { EncodedImage } from "../image_encoder";
 import { PacketGenerator } from "../packets";
 import { AbstractPrintTask } from "./AbstractPrintTask";
 
+/**
+ * @category Print tasks
+ */
 export class OldD11PrintTask extends AbstractPrintTask {
   override printInit(): Promise<void> {
     return this.abstraction.sendAll([
diff --git a/src/print_tasks/V5PrintTask.ts b/src/print_tasks/V5PrintTask.ts
index de2e612..8affe0c 100644
--- a/src/print_tasks/V5PrintTask.ts
+++ b/src/print_tasks/V5PrintTask.ts
@@ -2,6 +2,9 @@ import { EncodedImage } from "../image_encoder";
 import {  PacketGenerator } from "../packets";
 import { AbstractPrintTask } from "./AbstractPrintTask";
 
+/**
+ * @category Print tasks
+ */
 export class V5PrintTask extends AbstractPrintTask {
   override printInit(): Promise<void> {
     return this.abstraction.sendAll([
diff --git a/src/print_tasks/index.ts b/src/print_tasks/index.ts
index cf6cad9..581116b 100644
--- a/src/print_tasks/index.ts
+++ b/src/print_tasks/index.ts
@@ -5,7 +5,10 @@ import { D110PrintTask } from "./D110PrintTask";
 import { OldD11PrintTask } from "./OldD11PrintTask";
 import { V5PrintTask } from "./V5PrintTask";
 
-/** Define available print tasks. */
+/**
+ * Define available print tasks.
+ * @category Print tasks
+ */
 export const printTasks = {
   D11_V1: OldD11PrintTask,
   D110: D110PrintTask,
@@ -14,12 +17,19 @@ export const printTasks = {
   V5: V5PrintTask,
 };
 
-/** Available print task name type. */
+/**
+ * Available print task name type.
+ * @category Print tasks
+ */
 export type PrintTaskName = keyof typeof printTasks;
 
-/** List of available print task names. */
+/**
+ * List of available print task names.
+ * @category Print tasks
+ */
 export const printTaskNames = Object.keys(printTasks) as PrintTaskName[];
 
+/** @category Printer model library */
 export type ModelWithProtocol = {
   /** Model */
   m: M;
@@ -31,7 +41,8 @@ export type ModelWithProtocol = {
  * Define print tasks for models.
  * Model or model with protocol version can be specified.
  * Model with protocol version has priority over just model.
- **/
+ * @category Print tasks
+ */
 export const modelPrintTasks: Partial<Record<PrintTaskName, (ModelWithProtocol | M)[]>> = {
   D11_V1: [M.D11, M.D11S],
   B21_V1: [M.B21, M.B21_L2B, M.B21_C2B],
@@ -39,7 +50,10 @@ export const modelPrintTasks: Partial<Record<PrintTaskName, (ModelWithProtocol |
   B1: [M.D11_H, M.D110_M, M.B1],
 };
 
-/** Search print task. */
+/**
+ * Search print task.
+ * @category Print tasks
+ */
 export const findPrintTask = (model: M, protocolVersion?: number): PrintTaskName | undefined => {
   const tasks = Object.keys(modelPrintTasks) as PrintTaskName[];
 
diff --git a/src/printer_models.ts b/src/printer_models.ts
index baa1387..42e6245 100644
--- a/src/printer_models.ts
+++ b/src/printer_models.ts
@@ -4,6 +4,7 @@
 import { PrintDirection } from "./image_encoder";
 import { LabelType as LT } from "./packets";
 
+/** @category Printer model library */
 export enum PrinterModel {
   UNKNOWN = "UNKNOWN",
   A20 = "A20",
@@ -69,6 +70,7 @@ export enum PrinterModel {
   Z401 = "Z401",
 };
 
+/** @category Printer model library */
 export interface PrinterModelMeta {
   model: PrinterModel;
   id: [number, ...number[]];
@@ -81,6 +83,7 @@ export interface PrinterModelMeta {
   densityDefault: number;
 }
 
+/** @category Printer model library */
 export const modelsLibrary: PrinterModelMeta[] = [
   {
     model: PrinterModel.A20,
@@ -722,10 +725,12 @@ export const modelsLibrary: PrinterModelMeta[] = [
   },
 ];
 
+/** @category Printer model library */
 export const getPrinterMetaById = (id: number): PrinterModelMeta | undefined => {
     return modelsLibrary.find((o) => o.id.includes(id));
 };
 
+/** @category Printer model library */
 export const getPrinterMetaByModel = (model: PrinterModel): PrinterModelMeta | undefined => {
     return modelsLibrary.find((o) => o.model === model);
 };
diff --git a/src/utils.ts b/src/utils.ts
index e7ec81d..5b4962c 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,5 +1,6 @@
 /**
  * Utility class for various common operations.
+ * @category Helpers
  */
 export class Utils {
   /**
@@ -149,6 +150,7 @@ export class Utils {
 
 /**
  * Utility class for validating objects.
+ * @category Helpers
  */
 export class Validators {
   /**
diff --git a/typedoc.json b/typedoc.json
index 8102976..1005dd4 100644
--- a/typedoc.json
+++ b/typedoc.json
@@ -1,13 +1,12 @@
 {
   "$schema": "https://typedoc.org/schema.json",
   "name": "NiimBlueLib Docs",
-  "entryPoints": ["./src"],
+  "entryPoints": ["./src/index.ts"],
   "navigationLinks": {
     "GitHub": "https://github.com/MultiMote/niimbluelib"
   },
   "treatValidationWarningsAsErrors": true,
   "excludeReferences": true,
-  "entryPointStrategy": "expand",
   "out": "./docs/html",
   "projectDocuments": ["docs/documents/*.md"],
 }
diff --git a/utils/gen-printer-models.js b/utils/gen-printer-models.js
index 3a9a981..977f763 100644
--- a/utils/gen-printer-models.js
+++ b/utils/gen-printer-models.js
@@ -33,6 +33,7 @@ fetch("https://oss-print.niimbot.com/public_resources/static_resources/devices.j
     console.log('import { PrintDirection } from "./image_encoder";');
     console.log('import { LabelType as LT } from "./packets";\n');
 
+    console.log("/** @category Printer model library */");
     console.log("export enum PrinterModel {");
     console.log('  UNKNOWN = "UNKNOWN",');
     for (const item of items) {
@@ -43,6 +44,7 @@ fetch("https://oss-print.niimbot.com/public_resources/static_resources/devices.j
     console.log("};");
 
     console.log(`
+/** @category Printer model library */
 export interface PrinterModelMeta {
   model: PrinterModel;
   id: [number, ...number[]];
@@ -56,6 +58,7 @@ export interface PrinterModelMeta {
 }
 `);
 
+    console.log("/** @category Printer model library */");
     console.log("export const modelsLibrary: PrinterModelMeta[] = [");
     for (const item of items) {
       if (item.codes.length === 0) {
@@ -83,10 +86,12 @@ export interface PrinterModelMeta {
     console.log("];");
 
     console.log(`
+/** @category Printer model library */
 export const getPrinterMetaById = (id: number): PrinterModelMeta | undefined => {
     return modelsLibrary.find((o) => o.id.includes(id));
 };
 
+/** @category Printer model library */
 export const getPrinterMetaByModel = (model: PrinterModel): PrinterModelMeta | undefined => {
     return modelsLibrary.find((o) => o.model === model);
 };`);