[RESOLVED] Solid White status LED when running Threads tutorial example

Troubleshooting
1

I am trying to run the following example from the Threads Tutorial:

#include "Particle.h"

SYSTEM_THREAD(ENABLED);

void threadFunction(void);

Thread thread("testThread", threadFunction);

volatile int counter = 0;
unsigned long lastReport = 0;

void setup() {
	Serial.begin(9600);
}

void loop() {
	if (millis() - lastReport >= 1000) {
		lastReport = millis();

		Serial.printlnf("counter=%d", counter);
	}
}


void threadFunction(void) {
	while(true) {
		counter++;
	}
	// You must not return from the thread function
}

The device is an LTE E-Series with OS v1.4.0.

I am able to locally compile and flash without any issues. The problem is that the status LED goes to solid white following a reboot or flash. The serial monitor gets stuck at “Polling for available serial device…”

I am able to successfully run applications that do not use Threads without any issues.

UPDATE:

I was able to get it to work by starting the thread after initializing Serial in the setup function.

#include "Particle.h"

SYSTEM_THREAD(ENABLED);

void threadFunction(void);

Thread thread;

volatile int counter = 0;
unsigned long lastReport = 0;

void setup() {
	Serial.begin(9600);
    thread = Thread("testThread", threadFunction);
}

void loop() {
	if (millis() - lastReport >= 1000) {
		lastReport = millis();

		Serial.printlnf("counter=%d", counter);
	}
}


void threadFunction(void) {
	while(true) {
		counter++;
	}
	// You must not return from the thread function
}
1 Like
2

Thanks! Resolved my problem.