Sending Data To Dashboard Using Particle.publish

Firmware
1

I am trying to use Particle.publish to see serial data coming from my machine. I am able to see the data in the serial monitor if I use Serial.write() but I am unsure of how to get the to show up correctly in the dashboard.

void loop() {
	// Ask machine a question
	Serial1.println("model number");

	// Look for incoming data for the next 1.5 seconds
	unsigned long start = millis();
	    while(millis() - start < 1500) {
                int c = Serial1.read();
		    if (c >= 0) {
                        // Send data to the dashboard
		        Particle.publish("Machine Data", c);
		    }
	     }
}

Any help would be great!

2

There’s a limit to how many times you can publish data, and you probably want to accumulate all of the characters into a single publish anyway. Something like this should work:

void loop() {
	// Ask machine a question
	Serial1.println("model number");

	// Look for incoming data for the next 1.5 seconds
	char buffer[128];
	int bufIndex = 0;
	unsigned long start = millis();
	while(millis() - start < 1500) {
        int c = Serial1.read();
		if (c >= 0 && bufIndex < (sizeof(buffer) - 1)) {
		    buffer[bufIndex++] = (char) c;
		}
	}
	buffer[bufIndex] =  0;
	if (bufIndex > 0) {
        // Send data to the dashboard
        Particle.publish("Machine Data", buffer);
	}
}

This accumulates all of the characters that arrive in the 1.5 seconds into buffer, then uses Particle.publish to send the data up, as long as it’s not empty.

3

That worked perfectly! Accumulating the data was my next hurdle, you’re a mind reader. Thank you for helping out again!