Hello, everyone;
I’m new to the community; I’ve already read a lot of discussions and taken parts of code to make some of my projects with blynk;
In my last project I’m having some whims with the connection to the blynk server; I’d like a help to understand how to solve the problems;
Here is a description of the whole project:
Circuit PCB:
https://easyeda.com/antonino.dattola/led-lamp
At first, I had a very strange behavior with esp, from the blynk app appeared the notification that esp was offline, and the output pins changed state; it happened several times in 2 days, so I had light on unintentionally…
The RSSI wifi value was about -80dBm (the router is about 5mt away and is separated by only 1 wall)
I thought of changing esp, I took another esp and replaced , the value of RSSI fell to -50dBm
Since last night no strange problem of change of state of output ;
After about 5 minutes appeared esp disconnect notification from blynk app; then I think through the pc to send ping to esp to understand if it is a device reset or a problem on the server side so I do: ping -t 192.168…
the answer always happens with a time of about 3ms, very fast.
I wait as long as after about 20 minutes returns the app to give notification of disconnection, but the ping has always had a positive response.
Closed the ping so as not to occupy the esp in useless answers.
This morning at 8:35 a.m. notification blynk app esp offline until 10:35 a.m.; I switch off the power supply and it restores quickly.
May be problems due to the very low delay() inside the code ?
Is the server where I connect correct?
Can the cili timer.setintervall of 100L duration be a problem? They are the control of the buttons on the wall.
Details Hardware :
• NodeMCU V2 (ESP12E) - Wifi
• Router Fritzbox 3490
• Smartphone Android Xiaomi MI 9T
• Blynk server
• Blynk Library version 0.6.1
/*
The project foresees that the chandelier can be controlled by blynk apps for smartphones, and by 2 buttons on the wall.
The controls to drive the chandelier from the blynk app are 3:
-On or off (also with timer)
-Change of brightness
-Deactivation or activation of the LEDs installed at the bottom. To have only indirect light bouncing from the ceiling.
There are 2 controls on the wall:
-Button for on/off control
-Button for changing brightness
to improve the chandelier and make it more “smart”, a DHT22 sensor has been inserted to control the temperature and humidity of the room.
During the connection time of the esp, (about 5-8 seconds) it is not possible to manage the buttons on the wall; if the connection to the server is not established,
a timer of 30sec is activated that allows to use the buttons on the esp.
/*
-------------------------------------------------------
USE PIN ESP8266:
PIN D1 - OUTPUT PWM OPTOISOLATOR 4N35 "PIN 1"
PIN D2 - NOT USE
PIN D3 - NOT USE
PIN D4 - OUTPUT Relay led down ON/OFF
PIN D5 - INPUT Pushbutton DIMMER (pulldown 10kohm)
PIN D6 - OUTPUT Relay ON/OFF ALIM MEANWELL
PIN D7 - INPUT SENSOR DHT22
PIN D8 - INPUT Pushbutton ON/OFF (pulldown 10Kohm)
USE PIN APP_Blynk:
V1 = RSSI Widget wifi power (GAUGE)
V2 = ON-OFF Widget ALIM LED_Sync pushbutton D8 (BUTTON)
V5 = Temperature DHT22 (GAUGE)
V6 = Humidity DHT22 (GAUGE)
V7 = Connection status ESP8266
D2 = Relay led down ON/OFF (BUTTON)
*/
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#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#define BLYNK_PRINT Serial
#include <DHT.h>
#define VPIN V2
#define VPIN1 V1
#define DHTPIN D7
#define DHTTYPE DHT22
WidgetLED led1(V7); //connection status led widget
char auth[] = "dNqLnA0MTYweGy_Jz04M_3yuT1U0uYRj"; //token blink app
char ssid[] = "FRITZ Claudio"; //ssid wifi
char pass[] = "Dattola100"; //password wifi
//char server[] = "xxx.xxx.xxx.xxx"; // IP for Local Cloud Server
char server[] = "blynk-cloud.com"; // URL for Blynk Cloud Server
int port = 8080;
int DeviceLED = 2; //led onboard esp
int ReCnctFlag; // Reconnection Flag
int ReCnctCount = 0; // Reconnection counter
float h; //dht22
float t; //dht22
BlynkTimer timer;
DHT dht(DHTPIN, DHTTYPE);
void lightOn();
void lightOff();
boolean LampState = 0;
boolean SwitchReset = true;
const int PULSANTE_EXT = D8;
const int ALIM = D6;
const int BUTTON_DIMMER = D5;
const int LED = D1;
//---------------setup dimmer button------------
int dir = 70; //step dimmer +e-
int lum = 0;
boolean toggle = false;
//-----------------------------------------------
void setup()
{
Serial.begin(115000);
pinMode(2, OUTPUT); //led board esp
pinMode(D2, OUTPUT);// Relay led down ON/OFF
pinMode(ALIM, OUTPUT);
pinMode(PULSANTE_EXT, INPUT);
pinMode(BUTTON_DIMMER, INPUT);
pinMode(LED, OUTPUT);
delay(10);
digitalWrite(ALIM, HIGH);
digitalWrite(2, HIGH); //spegni led ESP
digitalWrite(D2, HIGH); // relay led down 0
WiFi.begin(ssid, pass); // Non-blocking if no WiFi available
Blynk.config(auth, server, port);
Blynk.connect();
timer.setInterval(100L, ButtonCheck); //ciclo button on/off
timer.setInterval(100L, dimmerled); // ciclo dimmerled
timer.setInterval(4000L, myTimerEvent); //dht22 4sec
timer.setInterval(1000L, rssi); //rssi power wifi
timer.setInterval(1000L, blinkLedWidget); //
//Blynk.syncVirtual(V2); //sync app blynk pin V2
dht.begin();
Serial.println("DHT22 Blynk ready !!!");
}
BLYNK_CONNECTED() {
Serial.println("Connected");
ReCnctCount = 0;
}
//-----------------------------------------------------------------------------------------------------
void loop() {
timer.run();
if (Blynk.connected()) { // If connected run as normal
Blynk.run();
} else if (ReCnctFlag == 0) { // If NOT connected and not already trying to reconnect, set timer to try to reconnect in 30 seconds
ReCnctFlag = 1; // Set reconnection Flag
Serial.println("Starting reconnection timer in 30 seconds...");
timer.setTimeout(30000L, []() { // Lambda Reconnection Timer Function
ReCnctFlag = 0; // Reset reconnection Flag
ReCnctCount++; // Increment reconnection Counter
Serial.print("Attempting reconnection #");
Serial.println(ReCnctCount);
Blynk.connect(); // Try to reconnect to the server
//Blynk.syncVirtual(V2);
});
}
}
//-----------------------------------------------Button ON/OFF------------------------------------------
void ButtonCheck() {
boolean SwitchState = (digitalRead(PULSANTE_EXT));
Blynk.virtualWrite(V2,LampState); //Aggiorna il widget blynk on/off sincronizzato con pulsante ext
if (!SwitchState && SwitchReset == true) {
if (LampState) {
lightOff();
} else {
lightOn();
}
SwitchReset = false;
delay(50);
}
else if (SwitchState) {
SwitchReset = true;
}
}
void ToggleRelay() {
LampState = !LampState;
if (LampState) {
lightOn();
}
else lightOff();
}
void lightOn() {
digitalWrite(ALIM, LOW);
LampState = 1;
}
void lightOff() {
digitalWrite(ALIM, HIGH);
LampState = 0;
}
//---------------------------------------DIMMER LED BUTTON-------------------------------------
void dimmerled() {
if (digitalRead(BUTTON_DIMMER) == HIGH) {
toggle = true;
lum += dir;
if ((lum >= 0) && (lum < 840))
analogWrite(LED, lum);
delay(20);
} else { // toggle direction
if (toggle) {
dir = -1 * dir;
toggle = false;
}
}
}
BLYNK_WRITE(VPIN) {
int SwitchStatus = param.asInt();
if (SwitchStatus == 2){
ToggleRelay();
}
else if (SwitchStatus){
lightOn();
}
else lightOff();
}
//-------------------------------------DHT22----------------------------------------------------
void myTimerEvent() {
getData();
Blynk.virtualWrite(V5, t);//Temp for widget blynk
Blynk.virtualWrite(V6, h);//humidity for widget blynk
}
void getData() {
h = dht.readHumidity();
t = (dht.readTemperature());
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.println(" *C ");
}
//-------------widget rssi wifi--------------------
void rssi() {
Blynk.virtualWrite(V1, WiFi.RSSI()); //Signal strengt wifi
}
//-----------widget vitality esp connect-----------
void blinkLedWidget()
{
if (led1.getValue()) {
led1.off();
//Serial.println("LED on V1: off");
} else {
led1.on();
//Serial.println("LED on V1: on");
}
}
