I'm making a GPS speedo and I'm trying to read in some serial, store a value from a substring and echo it back via serial.
At the moment I'm having problems storing the substring.
I've gotten to the point where I'm able to get some data between < and >. But the data doesn't come in like that. It's NMEA data stream and the data I want is between ,N, and ,K,
So I've been trying to replace ,N, with < and ,K, with >
Just can't get it to work. I get 'error: request for member 'replace' in 'c', which is of non-class type 'char''
Here's my code so far....
- Code: Select all
int indata = 0;
int scrubdata = 0;
char inString[32];
int stringPos = 0;
boolean startRead = false; // is reading?
void setup() {
Serial.begin(4800);
}
void loop() {
String pageValue = readPage();
Serial.print(pageValue);
}
String readPage(){
//read the page, and capture & return everything between '<' and '>'
stringPos = 0;
memset( &inString, 0, 32 ); //clear inString memory
while(true){
if (Serial.available() > 0) {
char c = Serial.read();
c.replace(",N,", "<");
c.replace(",K,", ">");
if (c == '<' ) { //'<' is our begining character
startRead = true; //Ready to start reading the part
}else if(startRead){
if(c != '>'){ //'>' is our ending character
inString[stringPos] = c;
stringPos ++;
}else{
//got what we need here! We can disconnect now
startRead = false;
return inString;
}
}
}
}
}
If there's a better way to do this I'm all ears
