Why does my blynk only stay online but not receiving the data

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1

Good day to all I have a problem. I don’t know whether it’s about blynk or my node. My issue is that when I connect my node to my laptop it sends the data to my blynk in the website but if I use my charger 5v as the power supply then it only shows online on the blynk website but no values are sent. What could be a solution for this one? Note that I used the same wire on my charger and on my laptop to power my nodemcu.


#define BLYNK_TEMPLATE_ID "TMPL64qpH6bPb"
#define BLYNK_TEMPLATE_NAME "mq137"
#define BLYNK_AUTH_TOKEN "zeFfyjNsRBwxi2LXwTTR2ZQ2njAa9F8p"
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <SoftwareSerial.h>
#include <BlynkSimpleEsp8266.h>

char auth[x] = "zeFfyjNsRBwxi2LXwTTR2ZQ2njAa9F8p";  // Replace with your Blynk Auth Token
char ssid[x] = "waWifi";              // Replace with your Wi-Fi SSID
char pass[] = "123456789";          // Replace with your Wi-Fi Password

SoftwareSerial nodemcuSerial(D7, D8);  // RX, TX pins on NodeMCU

BlynkTimer timer;

void myTimer() {
 while (nodemcuSerial.available()) {
   String data = nodemcuSerial.readStringUntil('\n');
   // Split the received data into ammonia and CO2 values
   int commaIndex = data.indexOf(',');
   String ammoniaValue = data.substring(0, commaIndex);
   String co2Value = data.substring(commaIndex + 1);
   
   float ppmValueAmmonia = ammoniaValue.toFloat();
   float ppmValueCO2 = co2Value.toFloat();
   
   Blynk.virtualWrite(V0, ppmValueAmmonia); // Send the ammonia ppm value to V0
   Blynk.virtualWrite(V1, ppmValueCO2); // Send the CO2 ppm value to V1
   
   Serial.print("Received ppm values - Ammonia: ");
   Serial.print(ppmValueAmmonia);
   Serial.print(", CO2: ");
   Serial.println(ppmValueCO2); // Print ppm values to the serial monitor
 }
}

void setup() {
 Serial.begin(9600);
 Blynk.begin(auth, ssid, pass);
 nodemcuSerial.begin(9600);
 timer.setInterval(1000L, myTimer);
}

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

thanks in advance.

2

Presumably it’s an issue with the charger that you’re using as a power supply.

Pete.

3

Indeed sir it worked now for me had to buy another charger to make it work. thanks and have a good day!

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4

Sir last question to create the excel file in mobile app do I need to pay for it?

5

Data export to CSV is done via the web console, not the app, but it requires a Pro subscription.

Pete.

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