void setup() {
  Serial.begin(115200);

   //define speech text here
 char* text = "[x0][g2][h2][m51][s6][t5]welcome to a new voltlog"; // this is for text speech
 //char* text = "[x1]sound101 sound102 sound103 sound104 sound105 sound106"; // this will output built-in sounds
  
 
//sending commands to XFS5152CE module
  Serial.write(0xFD);   //start coms, send header 0xFD
  Serial.write(0x00);   //high byte - message size
  Serial.write(2 + strlen(text));   //low byte - message size
  Serial.write(0x01);   //command type (0x01 means Speech synthesis command) 
  Serial.write(0x00);   //text encoding format (GB2312 works ok for english)
  Serial.write(text);   //text to be synthesized
}

void loop() {

}