Doubts current sensor ACS712 30A + Nodemcu ESP8266

Solved
16

I found the problem. was my severals nodeMCU connected on my computer at the same time!!! OMG! so many ports, and I was uploading the code to the wrong nodemcu…

I did the code. the loop ask the read function using SimpleTimer, 1 time per second and send the value to the blynk on V13 I used a GAUGE widget.

Screenshot_2016-09-13-20-49-51.png1080×1920 114 KB 

#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>

char auth[] = "...";
char ssid[] = "....";
char password[] = "...";


const int sensorIn = A0;
int mVperAmp = 66; // use 100 for 20A Module and 66 for 30A Module

double Voltage = 0;
double VRMS = 0;
double AmpsRMS = 0;

SimpleTimer timer0;

void readACS712() {
 Voltage = getVPP();
 VRMS = (Voltage/2.0) *0.707; 
 AmpsRMS = (VRMS * 1000)/mVperAmp;
 Serial.print(AmpsRMS);
 Serial.println(" Amps RMS");
 Blynk.virtualWrite(V13, AmpsRMS);
 pinMode(sensorIn, INPUT);
}

void setup(){ 
 Serial.begin(9600);
 Blynk.begin(auth, ssid, password);
 timer0.setInterval(1000L, readACS712);
 
}

void loop(){
 Blynk.run();
 timer0.run();
 
}

float getVPP()
{
  float result;
  
  int readValue;             //value read from the sensor
  int maxValue = 0;          // store max value here
  int minValue = 1024;          // store min value here
  
   uint32_t start_time = millis();
   while((millis()-start_time) < 1000) //sample for 1 Sec
   {
       readValue = analogRead(sensorIn);
       // see if you have a new maxValue
       if (readValue > maxValue) 
       {
           /*record the maximum sensor value*/
           maxValue = readValue;
       }
       if (readValue < minValue) 
       {
           /*record the maximum sensor value*/
           minValue = readValue;
       }
   }
   
   // Subtract min from max
   result = ((maxValue - minValue) * 5.0)/1024.0;
      
   return result;
 }
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