Hello again!
I have make a string function to get the frequency out from the string: $RTRDS,99.8,7,3,2,1,1,1,100,0,0,0,0*63
void loop()
{
String s = checkRDS();
if(s && s.substring(0, 6) == "$RTRDS")
{
Serial.print("Frequency ");
Serial.print(s[7]);
Serial.print(s[8]);
Serial.print(s[9]);
Serial.print(s[10]);
Serial.println("MHz");
}
And it works but now the frequency are 99.8 but if it change to 100.1 I only get "100."
How can i do to get everything between the comma?