View Code/**
An example showing how to put ESP8266 into Deep-sleep mode
*/

#include <ESP8266WiFi.h>

// WiFi credentials.
const char* WIFI_SSID = "SSID";
const char* WIFI_PASS = "SSID_Password";
#define soilPin A0
#define sensorPower 13
int ADCValue = 0;
long sleepTimeSeconds = 45;// this is not exact match - in my case it gives around 15 minutes interval
String sensorId="001"; // Be sure to change this to your sensor ID
WiFiClient client;
int numFields = 1;
char serverAddress[] = "192.168.X.X";

void connect() {

// Connect to Wifi.
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(WIFI_SSID);

WiFi.begin(WIFI_SSID, WIFI_PASS);

// WiFi fix: https://github.com/esp8266/Arduino/issues/2186
WiFi.persistent(false);
WiFi.mode(WIFI_OFF);
WiFi.mode(WIFI_STA);
WiFi.begin(WIFI_SSID, WIFI_PASS);

unsigned long wifiConnectStart = millis();

while (WiFi.status() != WL_CONNECTED) {
// Check to see if
if (WiFi.status() == WL_CONNECT_FAILED) {
Serial.println("Failed to connect to WiFi. Please verify credentials: ");
delay(10000);
}

delay(500);
Serial.println("...");
// Only try for 5 seconds.
if (millis() - wifiConnectStart > 15000) {
Serial.println("Failed to connect to WiFi");
return;
}
}

Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());

Serial.println();

// while (!device.connected()) {
// delay(1000);
// Serial.print(".");
// }

}

void HTTPPost(String fieldData[]){

// This function builds the data string for posting to Your Server and provides the correct format for the wifi
//client to communicate with it.
// It will post "numFields" worth of data entries, and take the data from the fieldData parameter passed to it.
// Be sure to increase numFields to the number of fields you need, and activate the fields in your channel view.
if (client.connect( serverAddress , 80 )){

// Build the Posting data string. If you have multiple fields, make sure the sting does not exceed 1440 characters.
String PostData= "SoilSensor=" + sensorId ;
for ( int field = 1; field < numFields+1; field++ ){
PostData += "&value=" + fieldData[ field ];
}

// POST data via HTTP
Serial.println( "Connecting to Server for update..." );
Serial.println();
client.println( "POST /u/soil.moisture.cgi HTTP/1.1" );
client.println( "Host: WhiteApple" );
client.println( "Connection: close" );
client.println( "Content-Type: application/x-www-form-urlencoded" );
client.println( "Content-Length: " + String( PostData.length() ) );
client.println();
client.println( PostData );
Serial.println( PostData );
client.stop();
}
else {
Serial.println( "Can not connect to the server.." );
}
}

int readSoil()
{
digitalWrite(sensorPower, HIGH); // Turn power to device on
delay(10); // Wait 10 milliseconds for sensor to settle
ADCValue = analogRead(soilPin); // Read the value from sensor
digitalWrite(sensorPower, LOW); // Turn power to device off
return ADCValue; // Return the moisture value
}

void setup() {
Serial.begin(115200);
Serial.setTimeout(2000);

// Wait for serial to initialize.
while (!Serial) {
delay (100);
}

Serial.println("Device Started");
Serial.println("-------------------------------------");
Serial.println("Running Deep Sleep Firmware!");
Serial.println("-------------------------------------");

pinMode( sensorPower , OUTPUT );
digitalWrite( sensorPower , LOW ); // Set to LOW so no power is flowing through the sensor.

}

void loop() {
connect();
delay( 2000 );
String data[ 8 ]; // You can fill data with up to 8 values to write to successive fields in your channel.
digitalWrite(sensorPower, HIGH); // Turn power to device on
delay(10); // Wait 10 milliseconds for sensor to settle
data[ 1 ] = analogRead(soilPin); // Read the value from sensor
digitalWrite(sensorPower, LOW); // Turn power to device off

Serial.print( "Soil Moisture = " );
Serial.println( data[ 1 ] );
delay( 2000 );
HTTPPost( data );
delay( 2000 );
Serial.println("Going into deep sleep..");
ESP.deepSleep(20e6 * sleepTimeSeconds, WAKE_NO_RFCAL);
Serial.println("Awakening now..");
delay( 2000 );
}