BLETestor vs Protractor, Level

專為開發者設計的 BLE 角色對等通訊測試工具 BLETestor 是一款強大且靈活的藍牙低功耗 (BLE) 調試工具，特別針對 ESP32 開發者與硬體工程師設計。不同於傳統的 BLE 掃描器，BLETestor 採用了「Role-based（角色對等）」的設計理念，讓 App 與設備之間能進行直覺、雙向的邏輯交互。 核心功能： * 角色對等通訊 (Role-based Spec)： 支援自定義 Button、Data 與 Log 通道，輕鬆切換 ESP32 ↔ App 的傳送與接收角色。 * 多樣化控制佈局： * 標準按鈕 (Buttons)： 5 個可自訂標題的控制按鈕。 * 虛擬搖桿 (Joystick)： 輸出精準的 X/Y 座標與狀態。 * 遊戲手把 (Gamepad)： 結合方向鍵與動作按鈕，適合遙控機器人或小車。 * BCBP 協議支持： 內建藍牙控制二進制協議 (BCBP v1.1)，支援標準化的指令集。 * 設備反饋系統： 支援由設備端觸發的觸覺回饋 (Haptic) 與音效回饋 (Sound)，實現更真實的交互體驗。 * 實時日誌系統： HEX/ASCII 雙模式顯示，記錄所有 TX/RX 數據、CRC 校驗狀態及連線事件。 * 設定檔管理： 快速切換 Service 與 Characteristic UUID，適應不同的硬體開發需求。 為什麼選擇 BLETestor？ 如果您正在開發 ESP32 遙控設備、傳感器監控或任何 BLE 交互產品，BLETestor 能幫您省去開發測試用 App 的時間，專注於固件邏輯的完善。

Ruler, tape measure, bubble level and protractor. Four measuring tools in one app. Every tool is free. Centimetres and inches are both free. There is no subscription. RULER Measure anything against the edge of your screen. Centimetres and inches are shown at the same time, so there is no toggle to hunt for. Drag to measure, freeze the reading, copy it with one tap. TAPE MEASURE For anything longer than your phone. Measure one screen at a time and Notch adds up the running total as you go, with undo if you slip. BUBBLE LEVEL Lay the phone flat for a two-axis bubble, or hold it against a wall for a single-axis level. Reads in degrees and slope percentage, and buzzes the moment it is level so you do not have to watch the screen. Set your own zero on any surface. PROTRACTOR AND ANGLE FINDER Measure the tilt of a surface and hold the reading while you move the phone. Or drag two arms on screen to measure an angle on paper. ACCURATE, AND YOU CAN CHECK IT Notch knows the exact pixel density of your device, so it is accurate the moment you open it. If you want to verify, calibrate against any bank card. They are the same size in every country. WORKS ANYWHERE No account. No internet connection needed. No tracking, and nothing is sent anywhere. Notch Pro is a one-time purchase that saves your measurements to a history list. The measuring tools stay free forever.