void BluetoothController::sendBlueToothData() {
static long previousMillis = 0;
long currentMillis = millis();
if(currentMillis - previousMillis > sendInterval) { // send data back to smartphone
previousMillis = currentMillis;
// Data frame transmitted back from Arduino to Android device:
// < 0X02 Buttons state 0X01 DataField#1 0x04 DataField#2 0x05 DataField#3 0x03 >
// < 0X02 "01011" 0X01 "120.00" 0x04 "-4500" 0x05 "Motor enabled" 0x03 > // example
Serial2.print((char)STX); // Start of Transmission
Serial2.print(getButtonStatusString()); Serial2.print((char)0x1); // buttons status feedback
Serial2.print(getDataInt()); Serial2.print((char)0x4); // datafield #1
Serial2.print(getDataFloat()); Serial2.print((char)0x5); // datafield #2
Serial2.print(getDataString()); // datafield #3
Serial2.print((char)ETX); // End of Transmission
}
}
bool JsonActionResolver::resolve(std::string jsonMessage, ClientAction &action) {
const char *json = jsonMessage.c_str();
picojson::value v;
std::string err;
picojson::parse(v, json, json + strlen(json), &err);
if (!err.empty()) {
std::cout << "Error while parsing json: " << err << std::endl;
return false;
}
if (!v.is<picojson::object>()) {
std::cout << "JSON is not an object" << jsonMessage << std::endl;
return false;
}
std::string message;
if (!getString(v, "message", message)) {
return false;
}
std::transform(message.begin(), message.end(), message.begin(), ::tolower);
if (message == "start_tournament") {
// Requires password
if (!getDataString(v, "password", action)) return false;
if (!getDataInt(v, "numberOfGames", action)) action.ints.insert(std::pair<std::string, int>("numberOfGames", 1));
action.type = ClientAction::START_TOURNAMENT;
return true;
} else if (message == "end_tournament") {
// Requires password
if (!getDataString(v, "password", action)) return false;
action.type = ClientAction::END_TOURNAMENT;
return true;
} else if (message == "end_game") {
// Requires password
if (!getDataString(v, "password", action)) return false;
action.type = ClientAction::END_GAME;
return true;
} else if (message == "authenticate_admin") {
// Requires password
if (!getDataString(v, "password", action)) return false;
action.type = ClientAction::AUTHENTICATE_ADMIN;
return true;
} else if (message == "update_settings") {
// Requires password
if (!getDataString(v, "password", action)) return false;
getDataFloat(v, "wormWidth", action);
getDataFloat(v, "wormSpeed", action);
getDataFloat(v, "turnSpeed", action);
getDataInt(v, "countdown", action);
getDataInt(v, "minTimeBetweenGaps", action);
getDataInt(v, "maxTimeBetweenGaps", action);
getDataInt(v, "minTimeInGap", action);
getDataInt(v, "maxTimeInGap", action);
action.type = ClientAction::UPDATE_SETTINGS;
return true;
}
else if (message == "register") {
// Requires name
if (!getDataString(v, "name", action)) return false;
action.type = ClientAction::REGISTER;
return true;
} else if (message == "unregister") {
action.type = ClientAction::UNREGISTER;
return true;
} else if (message == "start_moving") {
action.type = ClientAction::START_MOVING;
return true;
} else if (message == "left_down") {
action.type = ClientAction::LEFT_DOWN;
return true;
} else if (message == "left_up") {
action.type = ClientAction::LEFT_UP;
return true;
} else if (message == "right_down") {
action.type = ClientAction::RIGHT_DOWN;
return true;
} else if (message == "right_up") {
action.type = ClientAction::RIGHT_UP;
return true;
}
std::cout << "Message not recognized: " << message << std::endl;
return false;
}
