macos cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'String' c++程序在macos上不灵光，报错是这个。根源上好像是gcc和c++ standard library混淆。我只说解决。报错的字符串变量后面加.c_str()。
void BleKeyboard::begin(void)
{
BLEDevice::init(deviceName.c_str()); //根据stackexchange交流修改。
BLEServer* pServer = BLEDevice::createServer();
pServer->setCallbacks(this);

hid = new BLEHIDDevice(pServer);
inputKeyboard = hid->inputReport(KEYBOARD_ID); // <-- input REPORTID from report map
outputKeyboard = hid->outputReport(KEYBOARD_ID);
inputMediaKeys = hid->inputReport(MEDIA_KEYS_ID);

outputKeyboard->setCallbacks(this);

hid->manufacturer()->setValue(deviceManufacturer.c_str()); //根据stackexchange交流修改。