Remote home automation

Projects General Guidance
1

Hello everyone,

I state that I entered very little in the Arduino world so I apologize if I will be very "elementary" in my explanation. I would like to remotely (via Blynk) display the value of the gas.
Currently the links I have made only the following:
Arduino one is powered by the pc
Esp-01 connected to the PC in this way:
Gnd -> Gnd
GPIO2 -> nothing
GPIO0 -> Gnd
RXD -> Rx arduino
TXD -> Tx arduino
CH_PD -> 3.3v arduino
RESET -> nothing
VCC -> 3.3v arduino

MQ-2 connected as follows:
VCC -> 5V arduino
GND -> gnd
A0 -> A0

Sketch:

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
int gas = A0;
int smoke;
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "xxx";
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "xxx";
char pass[] = "xxx";
BLYNK_READ(V5)
{
smoke = analogRead(gas);
  Blynk.virtualWrite(V5,smoke);
  Serial.println(smoke);
}
void setup()
{
   // Debug console
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
   pinMode(gas,INPUT);
}
void loop()
{
   Blynk.run();
}

The connection is successful on blynk but the value of the gas that is passed is incorrect.

Would you tell me where the error is and / or if I need more material?

Sorry for the ignorance but for some time I'm banging my head: smiley-confused:

Thank you all

2

Please provide details of what gas values you're expecting and what gas values you're getting instead. Are you experiencing unexpected fluctuations of the value or is it at a fairly consistent, if incorrect, value?

3

If I try the sensor without the Esp-01 card, the values ​​vary with the increase in the presence of the gas (tested with the lighter). Instead, trying everything with Blynk and the Esp-01 card, the gas value varies causally (between 90 and 120) and does not feel the presence of gas (test with lighter) despite the sensor led turns on (when the presence of gas exceeds a certain threshold).

I report the datasheets of the sensor Mq-2: