[SOLVED] syncAll or syncVirtual not working with Timer

[Lpasca]

The target application is a thermostat with two timers, one for morning and one for afternoon. During the timer periods, the radiators need to go on if the temperature of a DHT22 is less than a target temperature set by a slider widget.

When all is running, the timer event is sent correctly, Blynk_Write is called, and all seems to work fine. But when I restart the sketch (or for whatever reason the Arduino restarts), I cannot get the sketch to update itself with the state of the timer.

What am I doing wrong?

Setup is an Arduino Yun, a DHT22 and a Relay board for Radiators and Hot Water. Other ESP8266 sensors will then add more zones, but this is for later,

Here is the code:

/**************************************************************

• Home IoT - Based on Arduino/Blynk framework

• Arduino Yun 192.168.1.250

• Virtual Pin assignments:

• V0 - Target temperature

• V1/V11 - Temperature/Humidity Main Sensor (DHT22)

• V2/V12 - Temperature/Humidity Kitchen (DHT22)

• V3/V13 - Temperature/Humidity Master Bedroom (DHT22)

• V4/V14 - Temperature/Humidity Top Floor (DHT22)

• V5/V15 - Temperature/Humidity Outside (DHT22)

• V6 - Temperature Hot Water

• V7 - Temperature Radiator Water

• V20 - Timer Morning

• V21 - Timer Afternoon

• V22 - Relay Water/Burner

• V23 - Relay Radiator Pump

• V24 - Led Radiator

• V25 - Led Water

• V30 - LCD Display Widget

• V31 - Terminal

**************************************************************/

#define BLYNK_PRINT Serial // Comment this out to disable prints and save space
#include <Bridge.h>
#include <BlynkSimpleYun.h>
#include <SimpleTimer.h>
#include <Wire.h>
#include <Console.h>

// Initialize the DHT
#include <DHT.h>
#define DHTTYPE DHT22
#define DHTPIN 7
DHT dht(DHTPIN, DHTTYPE, 30);
float humidity, temp_f; // Values read from sensor

// Other global variables
float targetTemp = 21;
float Hysteresis = 0.5;
int TimerMorningOn = false;
int TimerAfternoonOn = false;

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth = " ";

SimpleTimer timer;

WidgetLCD lcd(V30);
WidgetLED ledRadiator(V24);
WidgetLED ledWater(V25);

// Keep this flag not to re-sync on every reconnection
bool isFirstConnect = true;

// This function will run every time Blynk connection is established
BLYNK_CONNECTED() {
if (isFirstConnect) {
Console.println(“*** Sync All ? ***”);
Blynk.syncAll();
isFirstConnect = false;
}

Blynk.virtualWrite(V0, targetTemp);
Blynk.virtualWrite(V26, false); // Shower Button off
}

BLYNK_WRITE(V0) //Slider Widget V0 - Target Temperature
{
targetTemp = param.asInt();
Console.print("V0 Target Temp → ");
Console.println(targetTemp);
}

BLYNK_WRITE(V20) //Timer Widget V20 - Timer Morning
{
TimerMorningOn = param.asInt();
Console.print("V20 Timer Morning → ");
Console.println(TimerMorningOn);
}

BLYNK_WRITE(V21) //Timer Widget V21 - Timer Afternoon
{
TimerAfternoonOn = param.asInt();
Console.print("V20 Timer Afternoon → ");
Console.println(TimerAfternoonOn);
}

void HomeWork()
{
temp_f = dht.readTemperature(false)- 1.8;// Read temperature as Celsius
humidity = dht.readHumidity();
Blynk.virtualWrite(V1, temp_f);
Blynk.virtualWrite(V11, humidity);

Console.println();
Console.print(“Uptime:”);
Console.print(millis()/1000);
Console.println(" --------------------");
Console.print("Temp : ");
Console.println(temp_f);
Console.print("Target T : ");
Console.println(targetTemp);
Console.print("Timer Mon : ");
Console.println(TimerMorningOn);
Console.print("Timer Aft : ");
Console.println(TimerAfternoonOn);

if (temp_f < targetTemp && (TimerMorningOn == 1 || TimerAfternoonOn == 1))
{
ledRadiator.on();
digitalWrite(8, LOW);
}
else
{
ledRadiator.off();
digitalWrite(8, HIGH);
};

}

void setup()
{
Serial.begin(115200);
Bridge.begin();
Console.begin();

Blynk.begin(auth);

lcd.clear();
lcd.print(0,0, “Starting Sensors”);
dht.begin();
delay(10000); // Allow board to settle

// Setup a function to be called every timer event
timer.setInterval(5000L, HomeWork);

pinMode(8, OUTPUT); // Relay Radiator
digitalWrite(8, HIGH); // Set off
ledRadiator.off();
pinMode(9, OUTPUT); // Relay Water
digitalWrite(9, HIGH); // Set off
ledWater.off();

Blynk.syncVirtual(V20);
Blynk.syncVirtual(V21);
}

void loop()
{
Blynk.run();
timer.run();
}

[Dmytro]

@Lpasca hello. But timer doesn’t have any state. It is just a trigger.

[Lpasca]

Got it. So it will just generate the event.

But it would be nice to have it remember, i.e. know when it is blinking.

[Dmytro]

You could do that via LED widget on app or button widget or value display… Indeed there are a lot of ways

[Lpasca]

Thanks. I was in fact going in that direction.