ESP8266 Community Forum

- Sun Apr 21, 2019 4:01 am #81935 Hi guys!
I have a project which sends soil moisture, temperature, air humidity data to ThingSpeak. It works perfectly. My problem is on my second project, when I add an LDD, which shares A0 pin with soil moisture through multiplexing. I can get all data over the serial monitor, but the board can't connect to TS. For the first project that runs ok, I am using a Nodemcu v2 "official" board. For the second one, it is a clear clone bought on taobao, which picture I am sharing. I suspect that 1) can be something related with a different library to connect wifi or 2) something related with the timer. None of them I am sure about.
I will appreciate all the help.

Code: Select all#define SW_VERSION " ThinkSpeak.com" // SW version will appears at innitial LCD Display
/* ESP12-E & Thinkspeak*/
#include <ESP8266WiFi.h>


WiFiClient client;
const char* MY_SSID = "xxx";
const char* MY_PWD = "xxx";
const char* TS_SERVER = "api.thingspeak.com";
String TS_API_KEY ="xxx"; 
int sent = 0;

/* TIMER */
#include <SimpleTimer.h>
SimpleTimer timer;

/* DHT22*/
#include "DHT.h"
#define DHTPIN D3 
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
float hum = 0;
float temp = 0;

/* Soil Moister */
int sensorPin = A0;    // analog input for both sensors
int enable1 = D1;      // enable reading Sensor 1
int enable2 = D2;      // enable reading Sensor 2

int ldrValue1 = 0;  // variable to store the value coming from sensor 1.
int soilValue2 = 0;  // variable to store the value coming from sensor 2.

void setup()
{
  Serial.begin(115200);
  delay(10);
  dht.begin();
  connectWifi();
  timer.setInterval(1000L, getDhtData);         
  //timer.setInterval(3000L, getSoilMoisterData);   
  timer.setInterval(4000L, sendDataTS);
  pinMode(enable1, OUTPUT);
  pinMode(enable2, OUTPUT);
}

void loop()
{
  // Sensor DHT22
  getDhtData();
 
  // Sensor 1 LDR
  digitalWrite(enable1, HIGH);
  ldrValue1 = analogRead(sensorPin);
  ldrValue1 = constrain(ldrValue1, 300, 850);
  ldrValue1 = map(ldrValue1, 300, 850, 0, 1023);
  Serial.print("Light intensity:  ");
  Serial.println(ldrValue1);
  digitalWrite(enable1, LOW);
  delay(1500);

// Sensor 2 SOIL MOISTURE

  digitalWrite(enable2, HIGH);
  delay(500);
  soilValue2 = analogRead(sensorPin);
  soilValue2 = constrain(soilValue2, 300, 0);
  soilValue2 = map(soilValue2, 300, 0, 0, 100);

  Serial.print("Soil moisture:  ");
  Serial.println(soilValue2);
  Serial.println();
  delay(1500);

  digitalWrite(enable2, LOW);
 
  displayData();
  delay(2000); // delay for getting DHT22 data
  timer.run(); // Initiates SimpleTimer
}


/***************************************************
 * Get DHT data
 **************************************************/
void getDhtData(void)
{
  float tempIni = temp;
  float humIni = hum;
  temp = dht.readTemperature();
  hum = dht.readHumidity();
  if (isnan(hum) || isnan(temp))   // Check if any reads failed and exit early (to try again).
  {
    Serial.println("Failed to read from DHT sensor!");
    temp = tempIni;
    hum = humIni;
    return;
  }
}
// display data
 
void displayData(void)
{
  Serial.print(" Temperature: ");
  Serial.print(temp);
  Serial.print("oC   Humidity: ");
  Serial.print(hum);
  Serial.println("%");
 
 }

 /***************************************************
 * Connecting WiFi
 **************************************************/
void connectWifi()
{
  Serial.print("Connecting to "+ *MY_SSID);
  WiFi.begin(MY_SSID, MY_PWD);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(1000);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi Connected");
  Serial.println(""); 
}

/***************************************************
 * Sending Data to Thinkspeak Channel
 **************************************************/
void sendDataTS(void)
{
   if (client.connect(TS_SERVER, 80))
   {
     String postStr = TS_API_KEY;
     postStr += "&field1=";
     postStr += String(temp);
     postStr += "&field2=";
     postStr += String(hum);
     postStr += "&field3=";
     postStr += String(soilValue2);
     postStr += "&field4=";
     postStr += String(ldrValue1);
     postStr += "\r\n\r\n\r\n\r\n";
   
     client.print("POST /update HTTP/1.1\n");
     client.print("Host: api.thingspeak.com\n");
     client.print("Connection: close\n");
     client.print("X-THINGSPEAKAPIKEY: " + TS_API_KEY + "\n");
     client.print("Content-Type: application/x-www-form-urlencoded\n");
     client.print("Content-Length: ");
     client.print(postStr.length());
     client.print("\n\n\n\n");
     client.print(postStr);
     delay(1000);
   }
   sent++;
   client.stop();
}
 


You do not have the required permissions to view the files attached to this post.

- Thu Apr 25, 2019 5:10 am #82031 Solved. Forget a line to call wifi. Also decided to add SimpleTimer library.