Can you use all the gpio pins when the wifi is working?

[Lukaskasc]

I have a weird fenomenon that when i add the wifi library and all the settings 2 out of 3 sensors stop working. If i remove the wifi code it works like it used to

I have an esp32 devkit v1 board and connected 3 sensors which are photoresistor (ky-018), dht-11 and capacitive soil moisture sensor.

dht-11 is connected to D14 (works)
photoresistor(ky-018) connected to D13 (doesn't work)
capacitive soil moisture sensor connected to D15 (doesn't work)

Code: Select all

#include "DHT.h"

#define DHTPIN 14     // Digital pin connected to the DHT sensor

#define DHTTYPE DHT11   // DHT 11


#include <WiFi.h>

const char* ssid     = "Cgates_E031F1"; // ESP32 and ESP8266 uses 2.4GHZ wifi only
const char* password = "60E541C32F";

DHT dht(DHTPIN, DHTTYPE);
const byte lightPin = 13;
int lightReading;
int lightReadingpercent=0;
const int RELAY_PIN = 15;  // the Arduino pin, which connects to the IN pin of relay
int sensorPin27 = 15; // soil moisture

const int AirValue = 4095;   //you need to replace this value with Value_1
const int WaterValue = 2200;  //you need to replace this value with Value_2
const int SensorPin = 15;

int soilMoistureValue = 0;
int soilmoisturepercent=0;
const int Lightvalue = 0;
const int Darkvalue = 4095;
 

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);

// begin Wifi connect
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(2000);
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
 
  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  //end Wifi connect

 
  pinMode(RELAY_PIN, OUTPUT);//relay

  pinMode (sensorPin27, INPUT); // soil moisture
  
  Serial.println(F("DHTxx test!")); //dht
  ; 

  dht.begin();

}
void loop() {
  // put your main code here, to run repeatedly:

  lightReading = analogRead(lightPin); //0-4095 12bit -- esp8266 10bit 0-1023 -- arduino 8bit 0-254
 
  Serial.print("Light reading = ");
  
  lightReadingpercent = map(lightReading, Darkvalue, Lightvalue,  0, 100 );
  Serial.print(lightReadingpercent);
  Serial.println(" %");
  Serial.println();
  
  delay(500);

  soilMoistureValue = analogRead(SensorPin);  //put Sensor insert into soil 

soilmoisturepercent = map(soilMoistureValue, AirValue, WaterValue, 0, 100);
if(soilmoisturepercent > 100)
{
  Serial.println("Soil moisture ");
  Serial.println("100 %");
  delay(500);
  }
else if(soilmoisturepercent <0)
{
  Serial.println("Soil moisture ");
  Serial.println("0 %");
  delay(500);
}
else if(soilmoisturepercent >=0 && soilmoisturepercent <= 100)
{
  Serial.println("Soil moisture "); //go to next line
  Serial.print(soilmoisturepercent);
  Serial.println("%");

  delay(500); // soil end
}
 
   
 
  // Wait a few seconds between measurements.
  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F(" Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("C "));
  Serial.print(f);
  Serial.print(F("F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("C "));
  Serial.print(hif);
  Serial.println(F("F"));

  //Serial.println(sensorPin27);

 int moisture_level = map(analogRead(sensorPin27), 0, 1023, 100, 0); //read sensor and scale the reading 100% to 0%
 
  delay(500); //wait 0.5seconds

[Lukaskasc]

Found out that the sensors which didn't work need to be connected to adc1 port because when using WiFi adc2 port don't really work except for my dht-11 sensor