BLEキーボードをつくって、iPadを制御しよう

#include <BleKeyboard.h>

static BleKeyboard s_xBleKbd;

s_xBleKbd.begin();

if (s_xBleKbd.isConnected())
{
    // !!!接続中!!!
}

// 矢印←を送信
s_xBleKbd.write(KEY_LEFT_ARROW);

// Commandキー(Windowsキー)を押しながら、"h"を送信
s_xBleKbd.press(KEY_LEFT_GUI);
delay(10);
s_xBleKbd.print("h");
delay(10);
s_xBleKbd.release(KEY_LEFT_GUI);
delay(50);

/**
 * @brief kindle appの起動
 */
static void vProcSw_StartKindle(void)
{
    // ->home (Cmd + h)
    s_xBleKbd.press(KEY_LEFT_GUI);
    delay(10);
    s_xBleKbd.print("h"); //文字を送信
    delay(10);
    s_xBleKbd.release(KEY_LEFT_GUI);
    delay(50);

    // ->command (Cmd + Space)
    s_xBleKbd.press(KEY_LEFT_GUI);
    delay(50);
    s_xBleKbd.print(" "); // space
    delay(50);
    s_xBleKbd.release(KEY_LEFT_GUI);
    delay(50);

    // Erase the string with backspace
    for (int i = 0; i < 10; i++)
    {
        s_xBleKbd.write(KEY_BACKSPACE);
        delay(50);
    }

    // input - "kindle"
    delay(500);
    s_xBleKbd.print("kindle");
    delay(50);

    // input - "enter"
    s_xBleKbd.write(KEY_RETURN);
    delay(50);

    return;
}

#define JS_CHECK_TIME (25) // JoyStickチェック間隔:25msec
...
static TimerHandle_t s_xTimerJs = NULL;
...

ErType_t xInitJs(void)
{
    ...
    // text name, timer period, auto-reload, number of times, callback
    s_xTimerJs = xTimerCreate(cName, JS_CHECK_TIME, pdTRUE, (void *)0, vTimerCallbackJs);
    if (NULL == s_xTimerJs)
    {
        Serial.printf("%s : error - xTimerCreate\n", __func__);
        return ER_FAIL;
    }

    if (pdTRUE != xTimerReset(s_xTimerJs, JS_CHECK_TIME))
    {
        Serial.printf("%s : error - xTimerReset\n", __func__);
        return ER_FAIL;
    }

static void vTimerCallbackJs( TimerHandle_t xTimer)
{
    int32_t x = analogRead(JS_ASGN_AXIS_X);
    int32_t y = analogRead(JS_ASGN_AXIS_Y);
    ...