I have written few testing code on Nodemcu & its working well. Now i would like to connect multiple Nodemcu unit in common software. Each project allow you to add multiple device
these are doubt i had related to connect multiple device
How many device can be connected ?
Weather virtual tags are restricted to 125 tags or it can be increased??
when multiple device is connected to common wifi network. if any of the device is stopped working weather application also stop working
Is it possible to check active device in software,.
3 - Acquired knowledge from use and reading. No, the App and other devices should keep running, unless for some reason your code requires it and locks up without some device feedback.
4 - Acquired knowledge from use and reading. The Server/App sees it, but as far as other devices… not that I am aware of. You would have to code something somehow.
But Push Notification Widget can already be set to alert when a device goes offline.
Yes Today. I have tested my code with multiple nodemcu unit. I have 2 different multiple nodemcu, I have created single project with 2 device attached.
Both device has unique authorization code. Here i am pasting sample code here. I could able to update data from single device not from second salve.
I_f i use single same authorization code .the data get update once later went offline. If i use differnet authorization code both device is connected but i get update fr single device only. other device wont read at all._
For second device i only assigned further virtual pins to avoid conflict by dislecting unused pins from nodemcu1.Serially i could see data being printed. But not updated in blynk app
I am trying to connect multiple nodemcu unit to common Blynk application software.
I have currently 2 device connected each device has different authorization code. The changes are made as below code . Below code is meant for nodemcu unit1 with its authorization code. I have modified code2 for second device with change in virtual pin after 23-44.when both device comes online , I am getting updates from single device only other device display 00. if i check serial monitor both device could able to recorda and display data. what changes need to made to get both device data
Is there any restrictions . why i am facing such issue, weather 2 nodemcu cant be connected ?? weather any example code available for connecting multiple salve device. Device are connected with 2 different authorization code. Only issue updating with blynk app. only one data parameter being updated. other is replicate code with change in register value.
Please spend some time reading the documentation and searching through this forum… common issues include processing to many commands at once as that sends too much data at the same time, causing disconnections.
Your void loop() is very bad
Yoiut timer is a whole millisecond long
And finally you are processing way to many virtual writes, syncs and well… everything way too much too fast
I have tried with timer and updating same . timer.setInterval(1000, BLYNKWRITE); timer.setInterval(1000, Load_function);
In both case i found max update time is 6S. So every 6 data get populated when i take input from modbus slave.I kept in loop only because of testing.Load_function() is timer interrupt where i could read data for every 1s.
Here is my code. With below code i could able to establish connection with single device.
I am changing only . below code is for nodemcu unit 2
autorization code
BLYNKWRITE() function where i am sending data to virtual PIN V0-V21. other oart of code work remain same.
when i check indivually with their authorization code working very well. But when club together only one device will communcate. some time only one device connected .
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <WidgetRTC.h>
BlynkTimer timer;
char auth[] = "Auth_cod1";
char ssid[] = "HOT SPOT";
char pass[] = "airtel123";
unsigned int data1[100];
ModbusMaster232 node(2);// change device address here.
// Define one address for reading
#define address 0
// Define the number of bits to read
#define bitQty 60
void setup()
{
Serial.begin(9600);
// Initialize Modbus communication baud rate
node.begin(9600);
Blynk.begin(auth, ssid, pass);
setSyncInterval(100);
timer.setInterval(2000, ModBusRead); // Update Time Check every 10 seconds
timer.setInterval(1000, BLYNKWRITE);
}
void loop()
{
Blynk.run();
timer.run();
}
BLYNK_CONNECTED()
{
Blynk.syncAll();
}
void BLYNKWRITE()
{
Blynk.virtualWrite(V22, (data1[0] / 10.0)); // frequency
Blynk.virtualWrite(V23, (data1[2] / 10.0)); // VRphase
Blynk.virtualWrite(V24, (data1[4] / 10.0)); // VYphase
Blynk.virtualWrite(V25, (data1[6] / 10.0)); // VBphase
Blynk.virtualWrite(V26, (data1[8] / 10.0)); // VR-VY
Blynk.virtualWrite(V27, (data1[10] / 10.0)); // VY-VB
Blynk.virtualWrite(V28, (data1[12] / 10.0)); // VB-VR
Blynk.virtualWrite(V29, (data1[14] / 10.0)); //IRph
Blynk.virtualWrite(V30, (data1[16] / 10.0)); //IYph
Blynk.virtualWrite(V31, (data1[18] / 10.0)); //IBph
Blynk.virtualWrite(V32, (data1[20] / 10.0)); //PFRph
Blynk.virtualWrite(V33, (data1[22] / 10.0)); //PFYph
Blynk.virtualWrite(V34, (data1[24] / 10.0)); //PFBph
Blynk.virtualWrite(V35, (data1[26] / 10.0)); //Total_PF
Blynk.virtualWrite(V36, data1[28]);
Blynk.virtualWrite(V37, data1[30]);
Blynk.virtualWrite(V38, data1[32]);
Blynk.virtualWrite(V40, data1[34]);
Blynk.virtualWrite(V41, data1[36]);
Blynk.virtualWrite(V42, data1[38]);
Blynk.virtualWrite(V43, data1[40]);
}
void ModBusRead()
{
int result = node.readHoldingRegisters(address, bitQty);
//Read_Modbus_data1();
data1[0] = node.getResponseBuffer(0);// holds value of Frequency
data1[1] = node.getResponseBuffer(1);
data1[2] = node.getResponseBuffer(2);// holds value of VRph
data1[3] = node.getResponseBuffer(3);
data1[4] = node.getResponseBuffer(4);// holds value of VYph
data1[5] = node.getResponseBuffer(5);
data1[6] = node.getResponseBuffer(6);// holds value of VBph
data1[7] = node.getResponseBuffer(7);
data1[8] = node.getResponseBuffer(8);// holds value of VRph-VYph
data1[9] = node.getResponseBuffer(9);
data1[10] = node.getResponseBuffer(10);// holds value of Vyph-Vbph
data1[11] = node.getResponseBuffer(11);
data1[12] = node.getResponseBuffer(12);// holds value of VBph-VYph
data1[13] = node.getResponseBuffer(13);
data1[14] = node.getResponseBuffer(14);// hold value of IRCurrent
data1[15] = node.getResponseBuffer(15);
data1[16] = node.getResponseBuffer(16);// hold value of IYCurrent
data1[17] = node.getResponseBuffer(17);
data1[18] = node.getResponseBuffer(18);// hold value of IBCurrent
data1[19] = node.getResponseBuffer(19);
data1[20] = node.getResponseBuffer(20);// hold value of PFR
data1[21] = node.getResponseBuffer(21);
data1[22] = node.getResponseBuffer(22);// hold value of PFY
data1[23] = node.getResponseBuffer(23);
data1[24] = node.getResponseBuffer(24);// hold value of PFB
data1[25] = node.getResponseBuffer(25);
data1[26] = node.getResponseBuffer(26);// hold value of TP
data1[27] = node.getResponseBuffer(27);
data1[28] = node.getResponseBuffer(28);// hold value of ACTPOWR
data1[29] = node.getResponseBuffer(29);
data1[30] = node.getResponseBuffer(30);// hold value of ACTPOWY
data1[31] = node.getResponseBuffer(31);
data1[32] = node.getResponseBuffer(32);// hold value of ACTPOWB
data1[33] = node.getResponseBuffer(33);
data1[34] = node.getResponseBuffer(34);// hold value of TotalACTPOWR
data1[35] = node.getResponseBuffer(35);
data1[36] = node.getResponseBuffer(36);// hold value of ACTENERR
data1[37] = node.getResponseBuffer(37);
data1[38] = node.getResponseBuffer(38);//hold value of ACTENERY
data1[39] = node.getResponseBuffer(39);
data1[40] = node.getResponseBuffer(40);//hold value of ACTENERB
data1[41] = node.getResponseBuffer(41);
data1[42] = node.getResponseBuffer(42);//hold value of Total Active power
data1[43] = node.getResponseBuffer(43);
data1[44] = node.getResponseBuffer(44);
data1[45] = node.getResponseBuffer(45);
data1[46] = node.getResponseBuffer(46);
data1[47] = node.getResponseBuffer(47);
data1[48] = node.getResponseBuffer(48);
data1[49] = node.getResponseBuffer(49);
for (int i = 0; i < 10; i++)
{
//data1[i] = node.getResponseBuffer(i);
Serial.println(data1[i]);
}
Serial.println("............");
}
Don’t worry. Those library proper attached.i am pasting my part of my code. I found both device indivuly working. With authorization code. But not working both connected. Software code look like this
