/* DHT22 temperature and humidity data are uploaded to thingspeak using
   WeMOS ESP8266 MCU.

      This chip uses I2C bus to communicate, specials pins are required to interface
   Board:                                    SDA                    SCL                    Level
   Uno, Mini, Pro, ATmega168, ATmega328..... A4                     A5                     5v
   Mega2560................................. 20                     21                     5v
   Due, SAM3X8E............................. 20                     21                     3.3v
   Leonardo, Micro, ATmega32U4.............. 2                      3                      5v
   Digistump, Trinket, ATtiny85............. 0/physical pin no.5    2/physical pin no.7    5v
   Blue Pill, STM32F103xxxx boards.......... PB7                    PB6                    3.3v/5v
   ESP8266 ESP-01........................... GPIO0/D5               GPIO2/D3               3.3v/5v
   NodeMCU 1.0, WeMos D1 Mini............... GPIO4/D2               GPIO5/D1               3.3v/5v
   ESP32.................................... GPIO21/D21             GPIO22/D22             3.3v

   Details: http://embedded-lab.com/blog/iot-temperature-and-humidity-logger/
*/
#include <ESP8266WiFi.h>
#include <AHT10.h>
#include <Wire.h>

uint8_t readStatus = 0;

AHT10 myAHT10(AHT10_ADDRESS_0X38);

//#include "Math.h"
#define DHTTYPE DHT22
#define DHTPIN  0   // DHT22 data pin connects to D4

// Time to sleep (in seconds):
const int sleepTimeS = 60;
float humidity = 0;
float temp     = 0;

float prevTemp = 0;
const char* server = "api.thingspeak.com";
String apiKey = "API Key here";
const char* MY_SSID = "Livebox-37cc";
const char* MY_PWD = "8A6060920A8A86896F770F2C47";

// Host
const char* host = "192.168.1.3";
const int port = 81;
int idx        = 1203; //IDX for this virtual sensor, found in Setup -> Devices

int sent = 0;


void setup() {
  Serial.begin(115200);
  Serial.println();

  int bcl = 0;
  while (myAHT10.begin() != true && bcl < 5)
  {
    bcl ++;
    Serial.println(F("AHT10 not connected or fail to load calibration coefficient")); //(F()) save string to flash & keeps dynamic memory free
    delay(5000);
  }
  Serial.println(F("AHT10 OK"));
  connectWifi();

}

void loop() {

  /* DEMO - 1, every temperature or humidity call will read 6 bytes over I2C, total 12 bytes */
  Serial.println(F("DEMO 1: read 12-bytes, show 255 if communication error is occurred"));
  Serial.print(F("Temperature: "));
  temp = myAHT10.readTemperature();
  Serial.print(temp);
  Serial.println(F(" +-0.3C")); //by default "AHT10_FORCE_READ_DATA"

  Serial.print(F("Humidity...: "));
  humidity = myAHT10.readHumidity();
  Serial.print(humidity);

  
  Serial.println(F(" +-2%"));   //by default "AHT10_FORCE_READ_DATA"


  //  /* DEMO - 2, temperature call will read 6 bytes via I2C, humidity will use same 6 bytes */
  //  Serial.println(F("DEMO 2: read 6 byte, show 255 if communication error is occurred"));
  //  Serial.print(F("Temperature: ")); Serial.print(myAHT10.readTemperature(AHT10_FORCE_READ_DATA)); Serial.println(F(" +-0.3C"));
  //  Serial.print(F("Humidity...: ")); Serial.print(myAHT10.readHumidity(AHT10_USE_READ_DATA));      Serial.println(F(" +-2%"));
  //
  //
  //  /* DEMO - 3, same as demo2 but different call procedure */
  //  Serial.println(F("DEMO 3: read 6-bytes, show 255 if communication error is occurred"));

  readStatus = myAHT10.readRawData(); //read 6 bytes from AHT10 over I2C

  if (readStatus != AHT10_ERROR)
  {
    Serial.print(F("Temperature: "));
    Serial.print(myAHT10.readTemperature(AHT10_USE_READ_DATA));
    Serial.println(F(" +-0.3C"));
    Serial.print(F("Humidity...: "));
    Serial.print(myAHT10.readHumidity(AHT10_USE_READ_DATA));
    Serial.println(F(" +-2%"));
  }
  else
  {
    Serial.print(F("Failed to read - reset: "));
    Serial.println(myAHT10.softReset());         //reset 1-success, 0-failed
  }

  //delay(10000);

  sendTemperatureTS(temp, humidity);
  Serial.println("Goto to sleep");
  delay(200);
  ESP.deepSleep(sleepTimeS*1000000, WAKE_RF_DEFAULT); // Sleep for 60 seconds
}

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("Connected");
  Serial.println("");
}//end connect

void sendTemperatureTS(float temp1, float temp2)
{
  WiFiClient client;

  if (client.connect(host, port)) {
    Serial.println("WiFi Client connected ");

    client.print("GET /json.htm?type=command&param=udevice&idx=");
    client.print(idx);
    client.print("&nvalue=0&svalue=");
    client.print(temp);
    client.print(";");
    client.print(humidity);
    client.print(";0"); //Value for HUM_STAT. Can be one of: 0=Normal, 1=Comfortable, 2=Dry, 3=Wet
    client.println(" HTTP/1.1");
    client.print("Host: ");
    client.print(host);
    client.print(":");
    client.println(port);
    client.println("User-Agent: Arduino-ethernet");
    client.println("Connection: close");
    client.println();

    client.stop();

  }//end if
  sent++;
  client.stop();
}//end send