Skip to content

Bluetooth BLE Events

Overview

  • Inject touch and key events via PC ↔ ESP32 Bluetooth HID board ↔ phone (phone acts as HID Host)
  • Script object prefix is bleEvent, e.g. bleEvent.clickPoint(100, 200)
  • Before use, bind UDID ↔ bleMac in control center via right-click “Bluetooth HID Settings”; phone must be paired with the board
  • For HarmonyOS Next USB control center 3.2.0+
  • Setup and firmware flashing: Bluetooth BLE Tutorial
  • Different from USB HID Events (hidEvent): USB HID uses cable/AOA; this module uses a Bluetooth board

Connection and Configuration

forceRefreshSerialPort Force Refresh Serial Port and MAC

  • Force refresh serial port and MAC mapping
  • For HarmonyOS Next USB control center 3.2.0+
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.forceRefreshSerialPort();
    logd(r == null || r === "" ? "success" : r);
}
main();

setScreenSize Set Screen Size

  • Set screen size (touch coordinate w/h context)
  • If unknown, use screenshot width and height
  • For HarmonyOS Next USB control center 3.2.0+
  • @param w Screen width
  • @param h Screen height
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let img = image.captureFullScreen();
    let w = img.getWidth();
    let h = img.getHeight();
    img.recycle();
    let r = bleEvent.setScreenSize(w, h);
    logd(r == null || r === "" ? "success" : r);
}
main();

openSerial Open Serial Communication

  • Open serial communication (PC↔board, bleConnectMode=1)
  • For HarmonyOS Next USB control center 3.2.0+
  • @param timeout Serial timeout in milliseconds; default 15 seconds
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    bleEvent.setSendCmdType(1);
    let r = bleEvent.openSerial(15000);
    logd(r == null || r === "" ? "success" : r);
}
main();

closeSerial Close Serial Communication

  • Close serial communication
  • For HarmonyOS Next USB control center 3.2.0+
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.closeSerial();
    logd(r == null || r === "" ? "success" : r);
}
main();

setSerialTimeout Set Serial Timeout

  • Set serial timeout
  • For HarmonyOS Next USB control center 3.2.0+
  • @param out Serial timeout in milliseconds; default 15 seconds
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.setSerialTimeout(15000);
    logd(r == null || r === "" ? "success" : r);
}
main();

setSendCmdType Set Communication Method

  • Set serial or network communication with the board; default is serial
  • For HarmonyOS Next USB control center 3.2.0+
  • @param tt 1 = serial, 2 = network
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    // 1 serial 2 network
    let r = bleEvent.setSendCmdType(1);
    logd(r == null || r === "" ? "success" : r);
}
main();

setWifiInfo Set Board WiFi

  • Set network info so the board can connect to WiFi
  • For HarmonyOS Next USB control center 3.2.0+
  • @param name WiFi SSID
  • @param pwd WiFi password
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.setWifiInfo("your_ssid", "your_password");
    logd(r == null || r === "" ? "success" : r);
}
main();

resetBle Reset Board

  • Reset the board (equivalent to pressing RST)
  • For HarmonyOS Next USB control center 3.2.0+
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.resetBle();
    logd(r == null || r === "" ? "success" : r);
}
main();

light Blink LED

  • Blink the board LED
  • For HarmonyOS Next USB control center 3.2.0+
  • @param num Number of blink cycles
  • @param lightToOff Time from on to off in milliseconds
  • @param offToLight Time from off to on in milliseconds
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.light(3, 200, 100);
    logd(r == null || r === "" ? "success" : r);
}
main();

showBleName Show Bluetooth Name

  • Show Bluetooth name for discovery and pairing
  • For HarmonyOS Next USB control center 3.2.0+
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.showBleName();
    logd(r == null || r === "" ? "success" : r);
}
main();

hideBleName Hide Bluetooth Name

  • Hide Bluetooth name
  • For HarmonyOS Next USB control center 3.2.0+
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.hideBleName();
    logd(r == null || r === "" ? "success" : r);
}
main();

System Keys and Keyboard

systemKey System Key

  • System key
  • For HarmonyOS Next USB control center 3.2.0+
  • @param key home / recents (recent tasks; Win+Tab on HarmonyOS) / back
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    bleEvent.setSendCmdType(1);
    bleEvent.openSerial(15000);
    logd(bleEvent.systemKey("home"));
    sleep(1000);
    logd(bleEvent.systemKey("recents"));
    sleep(1000);
    logd(bleEvent.systemKey("back"));
}
main();

keyPress Key (ASCII Code)

  • Key press
  • For HarmonyOS Next USB control center 3.2.0+
  • @param prefix Modifier key; can be empty: alt / ctrl / gui / r_ctrl / r_shift / shift
  • @param code Integer ASCII; e.g. 65 = A, 97 = a
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    // Focus an input field first
    let r = bleEvent.keyPress("", 97);
    logd(r == null || r === "" ? "success" : r);
}
main();

keyPressChar Character Key

  • Character key
  • For HarmonyOS Next USB control center 3.2.0+
  • @param prefix Modifier key; can be empty: alt / ctrl / gui / r_ctrl / r_shift / shift
  • @param code Character, e.g. a
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    // Focus an input field first
    let r = bleEvent.keyPressChar("", "a");
    logd(r == null || r === "" ? "success" : r);
}
main();

Touch

clickPoint Click Coordinates

  • Click at absolute pixel coordinates
  • For HarmonyOS Next USB control center 3.2.0+
  • @param x X coordinate
  • @param y Y coordinate
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    bleEvent.setScreenSize(1080, 2400);
    bleEvent.setSendCmdType(1);
    bleEvent.openSerial(15000);
    let r = bleEvent.clickPoint(540, 1200);
    logd(r == null || r === "" ? "success" : r);
}
main();

doubleClickPoint Double-Click Coordinates

  • Double-click coordinates
  • For HarmonyOS Next USB control center 3.2.0+
  • @param x X coordinate
  • @param y Y coordinate
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.doubleClickPoint(540, 1200);
    logd(r == null || r === "" ? "success" : r);
}
main();

press Long Press Coordinates

  • Long press coordinates
  • For HarmonyOS Next USB control center 3.2.0+
  • @param x X coordinate
  • @param y Y coordinate
  • @param delay Long press duration in milliseconds
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.press(540, 1200, 1500);
    logd(r == null || r === "" ? "success" : r);
}
main();

swipeToPoint Swipe

  • Swipe from one coordinate to another
  • For HarmonyOS Next USB control center 3.2.0+
  • @param startX Start X coordinate
  • @param startY Start Y coordinate
  • @param endX End X coordinate
  • @param endY End Y coordinate
  • @param duration Duration in milliseconds
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.swipeToPoint(200, 800, 200, 400, 800);
    logd(r == null || r === "" ? "success" : r);
}
main();

touchDown Touch Down

  • Touch down at coordinates
  • For HarmonyOS Next USB control center 3.2.0+
  • @param x X coordinate
  • @param y Y coordinate
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.touchDown(300, 900);
    logd(r == null || r === "" ? "success" : r);
}
main();

touchMove Touch Move

  • Move touch to coordinates
  • For HarmonyOS Next USB control center 3.2.0+
  • @param x X coordinate
  • @param y Y coordinate
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.touchMove(320, 920);
    logd(r == null || r === "" ? "success" : r);
}
main();

touchUp Touch Up

  • Touch up at coordinates
  • For HarmonyOS Next USB control center 3.2.0+
  • @param x X coordinate
  • @param y Y coordinate
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let r = bleEvent.touchUp(320, 920);
    logd(r == null || r === "" ? "success" : r);
}
main();

multiTouch Multi-Touch

  • Multi-touch
  • Touch parameters: action — 0 = down, 1 = up, 2 = move
  • x: X coordinate / y: Y coordinate / pointer: finger index / delay: delay in ms
  • For HarmonyOS Next USB control center 3.2.0+
  • @param touch1 Touch point array
  • @param timeout Multi-touch execution timeout in milliseconds
  • @returns {string} null or empty string on success; otherwise an error message
function main() {
    let touch1 = [
        {"action": 0, "x": 500, "y": 1200, "pointer": 1, "delay": 20},
        {"action": 2, "x": 450, "y": 1100, "pointer": 1, "delay": 80},
        {"action": 2, "x": 400, "y": 1000, "pointer": 1, "delay": 80},
        {"action": 1, "x": 400, "y": 1000, "pointer": 1, "delay": 20}
    ];
    let r = bleEvent.multiTouch(touch1, 10000);
    logd(r == null || r === "" ? "success" : r);
}
main();

Quick Connect Example

function main() {
    let img = image.captureFullScreen();
    let w = img.getWidth();
    let h = img.getHeight();
    img.recycle();
    bleEvent.setScreenSize(w, h);
    bleEvent.setSendCmdType(1); // 1 serial 2 network
    let r = bleEvent.openSerial(15000);
    if (r != null && r !== "") {
        logw("communication failed: " + r);
        return;
    }
    bleEvent.systemKey("home");
    sleep(800);
    bleEvent.clickPoint(Math.floor(w / 2), Math.floor(h / 2));
}
main();