Problem running Given Code

Submitted by Afiq Aizat on Sat, 10/22/2016 - 19:33

I found error when compiling this code, can you help me why ?

#include"dht.h"                      // Including library for dht
#include<LiquidCrystal.h>
LiquidCrystal lcd(14,15,16,17,18,19);
#include<Timer.h>
Timer t;
#include <SoftwareSerial.h>
SoftwareSerial Serial1(2, 3);

#define dht_dpin 12 
#define heart 13
dht DHT;

char *api_key="SIWOYBX26OXQ1WMS";     // Enter your Write API key from ThingSpeak
static char postUrl[150];
int humi,tem;
void httpGet(String ip, String path, int port=80);

void setup()
{
 lcd.begin(16, 2);
 lcd.clear();
 lcd.print("   Humidity   ");
 lcd.setCursor(0,1);
 lcd.print("  Measurement ");
 delay(2000);
 lcd.clear();
 lcd.print("Circuit Digest ");
 lcd.setCursor(0,1);
 lcd.print("Welcomes You");
 delay(2000);
 Serial1.begin(9600);
 Serial.begin(9600);
 lcd.clear();
 lcd.print("WIFI Connecting");
 lcd.setCursor(0,1);
 lcd.print("Please wait....");
 Serial.println("Connecting Wifi....");
 connect_wifi("AT",1000);
 connect_wifi("AT+CWMODE=1",1000);
 connect_wifi("AT+CWQAP",1000);  
 connect_wifi("AT+RST",5000);
 connect_wifi("AT+CWJAP=\"1st floor\",\"muda1884\"",10000);
 Serial.println("Wifi Connected"); 
 lcd.clear();
 lcd.print("WIFI Connected.");
 pinMode(heart, OUTPUT);
 delay(2000);
 t.oscillate(heart, 1000, LOW);
 t.every(20000, send2server);
}

void loop()
{

  DHT.read11(dht_dpin);
  lcd.setCursor(0,0);
  lcd.print("Humidity: ");
  humi=DHT.humidity;
  lcd.print(humi);   // printing Humidity on LCD
  lcd.print(" %    ");
  lcd.setCursor(0,1);
  lcd.print("Temperature:");
  tem=DHT.temperature;
  lcd.print(tem);   // Printing temperature on LCD
  lcd.write(1);
  lcd.print("C   ");
  delay(1000);
  t.update();
}

void send2server()
{
  char tempStr[8];
  char humidStr[8];
  dtostrf(tem, 5, 3, tempStr);
  dtostrf(humi, 5, 3, humidStr);
  sprintf(postUrl, "update?api_key=%s&field1=%s&field2=%s",api_key,humidStr,tempStr);
  httpGet("api.thingspeak.com", postUrl, 80);
}

//GET https://api.thingspeak.com/update?api_key=SIWOYBX26OXQ1WMS&field1=0

void httpGet(String ip, String path, int port)
{
  int resp;
  String atHttpGetCmd = "GET /"+path+" HTTP/1.0\r\n\r\n";
  //AT+CIPSTART="TCP","192.168.20.200",80
  String atTcpPortConnectCmd = "AT+CIPSTART=\"TCP\",\""+ip+"\","+port+"";
  connect_wifi(atTcpPortConnectCmd,1000);
  int len = atHttpGetCmd.length();
  String atSendCmd = "AT+CIPSEND=";
  atSendCmd+=len;
  connect_wifi(atSendCmd,1000);
  connect_wifi(atHttpGetCmd,1000);
}

void connect_wifi(String cmd, int t)
{
  int temp=0,i=0;
  while(1)
  {
    lcd.clear();
    lcd.print(cmd);
    Serial.println(cmd);
    Serial1.println(cmd); 
    while(Serial1.available())
    {
      if(Serial1.find("OK"))

      i=8;
    }
    delay(t);
    if(i>5)
    break;
    i++;
  }
  if(i==8)
  {
   Serial.println("OK");
        lcd.setCursor(0,1);
      lcd.print("OK");
  }
  else
  {
   Serial.println("Error");
         lcd.setCursor(0,1);
      lcd.print("Error");
  }
}

 

Hi Afiq,

What Error do you get in this?

Paste the error also, that will help me sort out the problem

  Joined August 16, 2016      998
Tuesday at 12:29 AM

Now I can run the program but still there is no data sent to my channel in thingspeak. The wifi is connected to the esp8266 but no data is sent. Can you help me. Thank you

  Joined October 22, 2016      2
Saturday at 07:13 PM

I think the problem might be related to this code because the it always displayed "error".

void connect_wifi(String cmd, int t)
{
  int temp=0,i=0;
  while(1)
  {
    lcd.clear();
    lcd.print(cmd);
    Serial.println(cmd);
    Serial1.println(cmd); 
    while(Serial1.available())
    {
      if(Serial1.find("OK"))

      i=8;
    }
    delay(t);
    if(i>5)
    break;
    i++;
  }
  if(i==8)
  {
   Serial.println("OK");
        lcd.setCursor(0,1);
      lcd.print("OK");
  }
  else
  {
   Serial.println("Error");
         lcd.setCursor(0,1);
      lcd.print("Error");
  }

  Joined October 22, 2016      2
Saturday at 07:13 PM

Please ask this problem in the Comment section of respected project. Forum is for general question and answer.

  Joined May 28, 2015      340
Thursday at 12:47 PM

junaid shahid

Permalink

Is this statement is correct?

connect_wifi("AT+CWJAP=\"1st floor\",\"muda1884\"",10000);

I think it's like 

connect_wifi("AT+CWJAP=\","1st floor\","muda1884\",10000);

Is am Correct?

  Joined November 23, 2016      12
Wednesday at 06:16 PM