Breathing Green Suggestion

Troubleshooting
1

I am using a Photon with a GPS module. My code works however I have an issue upon startup where the photon breathes green. If I repeatedly power on the system it eventually connects, breathes cyan and publishes to the cloud however; it takes roughly 10 minutes. It has something to do with the GPS connecting and before I rip my code apart I figured I would see if anyone can see an obvious error in my code that would cause the photon to breathe green.

void loop() {
   Blynk.run();
   if (millis() > startTime + 60000) {    
       startTime = millis();
       Particle.publish("GPS1 Location", slocation);
   }
   while (Serial1.available() > 0)
       if (gps.encode(Serial1.read())) {
           displayInfo();
           delay(2000);
       }
   if (millis() > 5000 && gps.charsProcessed() < 10) {
       msg5 = "No GPS detected";
       Blynk.virtualWrite(V5, msg5);
       while(true);
   }
}
void displayInfo() {
   if (gps.location.isValid()) {
       lat = gps.location.lat();   
       lon = gps.location.lng();
       Blynk.virtualWrite(V0, 1, lat, lon, "car");    
        
       slocation = String(lat) + "," + String(lon);
       msg5 = "Good Signal";
       Blynk.virtualWrite(V5, msg5);
   }
   else
   {
       msg5 = "Poor Signal";
       Blynk.virtualWrite(V5, msg5);
   }
}
2

You do have a condition in here that freezes execution forever if it takes longer than 5 seconds to get a GPS message…

if (millis() > 5000 && gps.charsProcessed() < 10) {
  msg5 = “No GPS detected”;
  Blynk.virtualWrite(V5, msg5);
  while(true);
}

Blocking for long periods of time (or forever) will cause the Particle to stop servicing the network.

5 Likes
3

See this document for Breathing Green tips.

cheers,
ParticleD