Which Hardware device is the best for Blynk Server?

tzaroon · August 26, 2019, 8:24am

Which Hardware device is the best for local blynk server. Because Raspberry Pi is not able to handle the multiple devices. Specially when I increase my devices from 3 to 5

Gunner · August 28, 2019, 5:55am

I have had easily 6-8 devices running simultaneously on my RPi3 Blynk server, along with lots of available headroom for an image server and also running a couple of Blynk clients via NodeJS and Python…

I see no reason why t couldn’t handle dozens of devices… I suspect the WiFi would be the bottleneck before the RPi. But on that note, I used the Ethernet on my RPi3.

tzaroon · August 28, 2019, 6:31am

I am using RPi 3 with ethernet… but some times my devices disconnects… I think wifi modem is doing issue… do you have any idea which modem whould be better

PeteKnight · August 28, 2019, 7:04am

I would suspect that your disconnections are caused by badly written/structured code.

Pete.

tzaroon · August 28, 2019, 7:14am

No its not… I checked… when I connect my node mcu with the modem directly connected to my RPi 3 then the rate of disconnectivity is minor but when I connect my device with modem which is connected to rpi3 through another modem then disconnectivity happens alot

PeteKnight · August 28, 2019, 7:24am

I don’t quite understand the networking setup you’re describing, but clearly you’re saying it’s not the RPI where the issue lies but this other “modem” (router maybe?).

Pete.

tzaroon · August 28, 2019, 7:27am

My netwrok is like this:

Modem 1 -----> Modem 2 ------> RPi3

Modem 1 has Wifi and Connected to Modem 2 with ethernet
Modem 2 is the Continuing the IP of Modem 1 and it has its own Wifi
RPI3 using ethernet with Modem 2

PeteKnight · August 28, 2019, 7:33am

Is “Modem1” a router and “Modem2” a wireless access point of some sort?

Pete.

tzaroon · August 28, 2019, 7:36am

no both are router I am just using modem 2 to extent my internet range… because using single modem wifi range is low… and here my code too…

/*
  DIM: V0,V1,V2
  Dim ON/OFF: V13,V14,V15
  Relay: V3,V4,V7,V8,V9,V10,V11,V12
  Temp: V6
  Humidity: V5
*/
#define BLYNK_PRINT Serial
#define BLYNK_HEARTBEAT      20
#define BLYNK_TIMEOUT_MS     10000UL

#include <SoftwareSerial.h>
//#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DHT.h>
#include <DNSServer.h>            //Local DNS Server used for redirecting all requests to the configuration portal
#include <ESP8266WebServer.h>     //Local WebServer used to serve the configuration portal
#include <WiFiManager.h>

SoftwareSerial mySerial(D0, D3);
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "u0oXHmpzG3PH4XunFtaqImPJL3j5LCCD";
char IP_Address[] = "192.168.18.50";

#define DHTPIN 2          // D4 digital pin we're connected to

// Uncomment whatever type you're using!
#define DHTTYPE DHT11     // DHT 11
//#define DHTTYPE DHT22   // DHT 22, AM2302, AM2321
//#define DHTTYPE DHT21   // DHT 21, AM2301

DHT dht(DHTPIN, DHTTYPE);
BlynkTimer timer;

void setup()
{

  Serial.begin(9600);
  mySerial.begin(9600);
  dht.begin();

  WiFi.hostname("Omecta Device");
  WiFiManager wifiManager;
  wifiManager.autoConnect("Home Automation", "12345678");
  //Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 80);

  //  Blynk.begin(auth), WiFi.SSID().c_str(), WiFi.psk().c_str(), IPAddress(192, 168, 18, 50), 8080);
  String dots = ".";
  WiFi.begin(WiFi.SSID().c_str(), WiFi.psk());
  //  Serial.print("Connecting to ");
  //  Serial.print(getConnectDetail(1024));
  while (WiFi.status() != WL_CONNECTED) {

    delay(100);
    Serial.print(".");

    dots += ".";

    if (dots.length() == 7 ) {
      dots = ".";
      Serial.print("\nConnecting to ");
      Serial.print(WiFi.SSID().c_str());
    }
  }

  Blynk.config(auth, IP_Address, 8080);
  Blynk.connect();
  // Setup a function to be called every second
  timer.setInterval(5000L, sendSensor);
}

BLYNK_CONNECTED() {
  Blynk.syncAll();
}

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

}

void sendSensor() {
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  Blynk.virtualWrite(V5, int(h));
  Blynk.virtualWrite(V6, int(t));
}

BLYNK_WRITE(V15) {
  int Value = param.asInt();
  mySerial.write(Value);
  //  delay(10);
  mySerial.write(16);
  //  }
}

BLYNK_WRITE(V14) {
  int Value = param.asInt();
  mySerial.write(Value);
  //  delay(10);
  mySerial.write(15);
  //  }
}

BLYNK_WRITE(V13) {
  int Value = param.asInt();
  mySerial.write(Value);
  //  delay(10);
  mySerial.write(14);
}

BLYNK_WRITE(V12) {
  int Value = param.asInt();
  mySerial.write(Value);
  //  delay(10);
  mySerial.write(13);
}
//
//
BLYNK_WRITE(V11) {
  int Value = param.asInt();
  mySerial.write(Value);
  //delay(10);
  mySerial.write(12);
}




BLYNK_WRITE(V10) {
  int Value = param.asInt();
  mySerial.write(Value);
  //delay(10);
  mySerial.write(11);
}


//
BLYNK_WRITE(V9) {
  int Value = param.asInt();
  mySerial.write(Value);
  //delay(10);
  mySerial.write(10);
}

BLYNK_WRITE(V8) {
  int Value = param.asInt();
  mySerial.write(Value);
  //delay(10);
  mySerial.write(9);
}
//
BLYNK_WRITE(V7) {
  int Value = param.asInt();
  mySerial.write(Value);
  //delay(10);
  mySerial.write(8);
}

//
BLYNK_WRITE(V4) {
  int Value = param.asInt();
  mySerial.write(Value);
  //  delay(10);
  mySerial.write(7);
}


BLYNK_WRITE(V3) {
  int Value = param.asInt();
  mySerial.write(Value);
  //  delay(10);
  mySerial.write(6);
}

BLYNK_WRITE(V2) {
  int Value = param.asInt();
  mySerial.write(Value);
  // delay(10);
  mySerial.write(5);
}

BLYNK_WRITE(V1) {
  int Value = param.asInt();
  mySerial.write(Value);
  // delay(10);
  mySerial.write(4);
}

BLYNK_WRITE(V0) {
  int Value = param.asInt();
  mySerial.write(Value);
  //  delay(10);
  mySerial.write(3);
}

PeteKnight · August 28, 2019, 7:44am

Then it depends how you’ve configured your second router to act as a wireless extender. You could be running into double NAT, or double DHCP server issues, or simply have a connectivity issue with the two devices.

Pete.

tzaroon · August 28, 2019, 7:54am

Everything works fine when I have 2-3 nodeMCU connected…

PeteKnight · August 28, 2019, 9:11am

Maybe when you add more you’re getting overlapping up addresses if you have two DHCP servers running on your system.

Kill the second router and try it that way.

Pete.

tzaroon · August 28, 2019, 9:19am

First one is from the ISB Provider and it has only 16 Device connected Option… The Other one has 32. Don’t you think its better to buy a separate modem for Blynk and Use the Internet without any interruption

PeteKnight · August 28, 2019, 12:59pm

I’m not going to try to advise you on how to structure your home network, but I think your current issue is probably caused by overlapping DHCP servers. If that’s the case then you need to fix that, and understand more about networking, before heading-off in a different direction.

Pete.

tzaroon · August 28, 2019, 1:36pm

Thanks Pete For your time. The error was actually ping between two modems. It was due to extra Lan wire leghth. Thanks for your help😊

PeteKnight · August 28, 2019, 3:12pm

Pete.