In the semi-automatic mode, can't come into the loop after WIFI disconnection

Troubleshooting
1

Here is my code blow, the general idea is in the semi automaic mode, let the LED to breath when it is connected to the cloud, and let the LED blink when it is disconnected from the cloud.

I did one experiment that when the device is connected to the cloud, i will shutdown the WIFI network, then according the logics in my code the led will start to blink quickly and continuously to add a number n and print it out. However, in the real tests, when the WIFI is disconnected, I didn’t see anything happening on the blue led blinking quickly, nor any prints out with the number on the serial. The serial will only print out a number when the WIFI network is recovered and device is connected to cloud again.

    if(!Spark.connected() ){
        blink(A6);
        if(millis()>timerout)
        connect();

       Serial.println("un connected   ");
       Serial.println(n);
       n++;
    }

Here is my full code below.

#include <math.h>
int n;   
unsigned long timerout;
float breathing_val;

SYSTEM_MODE(SEMI_AUTOMATIC);

void setup() {

  pinMode(A5, OUTPUT);
  pinMode(A6, OUTPUT);
  pinMode(A7, OUTPUT);

  reset_timeout();
        
  dark(A5);dark(A6);dark(A7);
 Serial.begin(9600);

}



bool waitForWifi(unsigned timeout) {
    unsigned start = millis();
    while (!WiFi.ready() && (millis()-start)<timeout) {
        SPARK_WLAN_Loop();
        delay(1000);
    }
    return WiFi.ready();
}

bool waitForCloud(bool state, unsigned timeout) {
    unsigned start = millis();
    while (Spark.connected()!=state && (millis()-start)<timeout) {
        SPARK_WLAN_Loop();
        delay(100);
    }
    return Spark.connected()==state;
}

void connect() {
  WiFi.on();
  WiFi.setCredentials("Android123", "12345678");
  WiFi.connect();
  if (waitForWifi(20000)) { 
    Spark.connect();
    if (waitForCloud(true, 30000))  {

    }
  }
}

void loop() {
       if(!Spark.connected() ){
        blink(A6);
        if(millis()>timerout)
        connect();

       Serial.println("un connected   ");
       Serial.println(n);
       n++;
    } 

    if(Spark.connected()){
           breathing_val = (exp(sin(millis()/2000.0*M_PI)) - 0.36787944)*108.0;
           breath(A5);
           breath(A6);
           breath(A7);      
    }

}



void reset_timeout(){
    timerout = millis() + 20000;
}




void blink(int pin){
    digitalWrite(pin, HIGH);
    delay(60);
    digitalWrite(pin, LOW);
    delay(60);
}

void breath(int pin){
    analogWrite(pin, breathing_val);
}

void dark(int pin){
    digitalWrite(pin, HIGH);
}
2

Can’t see anything obvious in your code, but can you recheck your wiring?
Maybe you got a mixup with the adjacent pins GND and D7.

3

hi, @ScruffR, that problem happens sometimes, even now I don’t know why sometimes it work, sometimes it won’t.

However, now i observed a new problem, and I have changed my question again, could you have a look? thanks.

4

Sorry for the delayed response, but are you using a Core or a Photon?
(Edit: Can't be a Photon, otherwise your code would not build due to SPARK_WLAN_Loop() being deprecated :blush:)

Edit:
I've slightly modified your code so I don't need any external circuitry and it runs as expected on the Core

SYSTEM_MODE(SEMI_AUTOMATIC);
#include <math.h>

int n;   
unsigned long timerout;
float breathing_val;
bool  doneOnce = false;

void setup() 
{
    pinMode(D7, OUTPUT);
    
    pinMode(A5, OUTPUT);
    pinMode(A6, OUTPUT);
    pinMode(A7, OUTPUT);
    
    reset_timeout();
        
    dark(A5);dark(A6);dark(A7);
    
    Serial.begin(115200);
}

void loop() 
{
    if(!Spark.connected())
    {
        doneOnce = false;
        RGB.control(false);
        blink(D7);
        if(millis() > timerout)
            connect();

       Serial.print("disconnected   ");
       Serial.println(n++);
    } 

    if(Spark.connected())
    {
        if (!doneOnce)
        {
            RGB.control(true);
            doneOnce = true;
        }
        
        breathing_val = (exp(sin(millis()/2000.0*M_PI)) - 0.36787944)*108.0;
        breath(A5);
        breath(A6);
        breath(A7);      
        RGB.color(breathing_val, 0, 0);
    }
}

void reset_timeout()
{
    timerout = millis() + 20000;
}

void blink(int pin)
{
    digitalWrite(pin, HIGH);
    delay(60);
    digitalWrite(pin, LOW);
    delay(60);
}

void breath(int pin)
{
    analogWrite(pin, breathing_val);
}

void dark(int pin)
{
    digitalWrite(pin, HIGH);
}

void connect() 
{
    Serial.println("connect()");
    WiFi.on();
    //WiFi.setCredentials("Android123", "12345678");  // don't want this happening all the time
    WiFi.connect();
    if (waitForWifi(20000)) 
    { 
        Spark.connect();
        if (waitForCloud(true, 30000)) { }
    }
}

bool waitForWifi(unsigned timeout) 
{
    Serial.println("waitForWiFi()");

    unsigned start = millis();
    while (!WiFi.ready() && (millis() - start) < timeout) 
    {
        SPARK_WLAN_Loop();
        //Spark.process();  // for the Photon
        delay(1000);
    }
    return WiFi.ready();
}

bool waitForCloud(bool state, unsigned timeout) 
{
    Serial.println("waitForCloud()");

    unsigned start = millis();
    while (Spark.connected() != state && (millis() - start) < timeout) 
    {
        SPARK_WLAN_Loop();
        //Spark.process();  // for the Photon
        delay(100);
    }
    return (Spark.connected() == state);
}

Tested on the Photon, too - and it works.

BTW:

It would have been better to describe the new problem in that very post than modifiying the original post, since that renders in-between answers somewhat un-understandable.

5

Hi,@ScruffR, I am currently using Spark core for the work.