I have the following code on my Arduino that constantly checks for a serial command that's sent over TCP using a Wifly library.
What the following code does is split a string like the following when sent over serial:
{power,tv}
It sets these properties accordingly:
char command[32];
char value[32];
It then executes certain methods using sendCommand(command, value);
based on the properties set in the loop below.
Keep in mind this works just fine using the Wifly library.
void loop() {
Client client = server.available();
if (client) {
boolean start_data = false;
boolean next = false;
char command[32];
char value[32];
int index = 0;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.print(c);
if (c == '}') {
break;
}
if(start_data == true) {
if(c != ',') {
if(next)
value[index] = c;
else
command[index] = c;
index++;
} else {
next = true;
command[index] = '\0';
index = 0;
}
}
if (c == '{') {
start_data = true;
}
}
}
value[index] = '\0';
client.flush();
client.stop();
sendCommand(command,value);
}
}
Instead of using WiFi I've purchased some Xbee modules. They basically allow you to send serial bytes as well. The only problem is that I'm not quite sure how to handle the looping considering there's no while(client.connected()) anymore. Instead of that I've used while(Serial.available()) thinking that will work, but it doesn't set the value property for some reason.
Also I'm not sure whether the loop above is the best way of doing what I'm after, all I know is that it works just fine the way it is.
Here is my new loop, which only returns command and not value for some reason:
void loop() {
// if there are bytes waiting on the serial port
if (Serial.available()) {
boolean start_data = false;
boolean next = false;
char command[32];
char value[32];
int index = 0;
while (Serial.available()) {
char c = Serial.read();
Serial.print(c);
if (c == '}') {
break;
}
if(start_data == true) {
if(c != ',') {
if(next)
value[index] = c;
else
command[index] = c;
index++;
} else {
next = true;
command[index] = '\0';
index = 0;
}
}
if (c == '{') {
start_data = true;
}
}
value[index] = '\0';
sendCommand(command,value);
}
}
void sendCommand(char *command, char *value) {
// do something wonderful with command and value!
}