Poor cellular and pin output behavior

Firmware Device OS
1

I’m running 4.0.2 and I noticed that if pinMode is set to Output - HIGH, each time Boron looses cellular connectivity it resets the pin Output to LOW. Does anyone know why this is and if there is a way to prevent this? I was thinking about saving the pin Output state to EEPROM but is there a better way to handle this?

2

That should not occur. Which pin, and can you make a really simple version of the firmware that can reproduce the problem?

3

I did some more testing and it appears to happen when the antenna is mounted directly above and no more than 1/4 inch from the Boron. Here is some sample code I used.

int pin = D7;
int CR(String command);

void setup()
{
  pinMode(pin, OUTPUT);
  Particle.function("Control", CR);
}

void loop()
{
}

int CR(String command)
{
  if (command.equalsIgnoreCase("1"))
  {
    digitalWrite(pin, HIGH);
    return 1;
  }
  if (command.equalsIgnoreCase("0"))
  {
    digitalWrite(pin, LOW);
 
    return 0;
  }

  if (command.equalsIgnoreCase("Reset"))
  {
    digitalWrite(pin, HIGH);

    for (uint32_t ms = millis();
         millis() - ms < 10000;
         Particle.process())
      ;
    digitalWrite(pin, LOW);
 
    return 2;
  }
  return 9;
}