* @param VOICE_NUMBER_7 0x07
* @param VOICE_NUMBER_8 0x08
* @param VOICE_NUMBER_9 0x09
* @return state
* VOICE_SYNTHESISING is speech synthesis state
* VOICE_PLAYING is playing state
* VOICE_RECORDING is recording state
* VOICE_NONE is idle condition set number success
*/
uint8_t setVoiceNumber(uint8_t number);
/**
* @brief get i2c device address
* @return i2c device address
*/
uint8_t getI2CAddress();
/**
* @brief get now state
* @return state
* VOICE_SYNTHESISING is speech synthesis state
* VOICE_PLAYING is playing state
* VOICE_RECORDING is recording state
* VOICE_NONE is idle condition
*/
uint8_t getNowState(void);
/**
* @brief get Button Mode
* @return Mode
* BUTTON_MODE_ON 0x00
* BUTTON_MODE_OFF 0x01
*/
uint8_t getButtonMode(void);
/**
