Arduino.ru

#include <SoftwareSerial.h>
#include <String.h>
#include <EEPROM.h>
#include <Wire.h>
#include <SPI.h>
#include <Ethernet.h>
#include <dht.h>

// pins definition
SoftwareSerial sim800l(7, 6); // actual RX, TX pins of SIM800l board
const int TestButton = 10; // internal pull-up activated, button is wired to GND, LOW when pressed
const int LEDPowerFailure = 9;
const int LEDTemperatureFailure = 4;
const int LEDLANFailure = 11;
const int LEDDiagnostics = 13; // internal LED for diagnostics
const int PowerSenseInput= A1; // from DC adapter via a voltage divider 
const int DHT11Pin = 12; 	   // DHT11 onewire pin

// failure definitions constants - bitwise
const int StateOk = 0;
const int StatePowerDownFailure = 1;
const int StateLANFailure = 2;
const int StateTemperatureFailure = 4;
const int StateTest = 8;

float TempSensorValue; // current temperature from sensor DHT11
float PowerSenseInputValue; // voltage after divider
int   PingFailure = 0; // flag 
int   PingCountOk; // counter
int   TestButtonState; // pressed LOW
int   State = StateOk; // status of the net/temp/power/test

// User configurable variables (via source recompile and upload to Arduino board again)
// pinging
byte useDhcp = true;
byte useDns = true;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
// these valus must be changed
IPAddress deviceIp(192, 168, 1, 100); // Only if useDhcp is false !!!
IPAddress gatewayIp(192, 168, 1, 1); // Only if useDhcp is false  !!!
IPAddress dnsIp(192, 168, 1, 1); // Only if useDhcp is false   !!!
IPAddress subnet(255, 255, 255, 0); // Only if useDhcp is false !!!
IPAddress serverIp(173, 230, 152, 173); // Only if useDns is false !!!
char serverName[] = "server1.tu-plovdiv.bg"; // Only if useDns is true !!!
// thresholds
const int TemperatureAlarmValue = 36; // over 36C - alarm
const int PingCountAlarmValue = 3; // over 3 lost packets - alarm
const float DCPowerAlarmValue = 0.5; // under 0.5 volts after voltage diveider - alarm
const float DCPowerVoltage = 9.0; // voltage of the power adaptor

EthernetClient Client; // Declare client object
dht DHT; // DHT object

void setup() // initialise ports/values
{
  pinMode(TestButton, INPUT_PULLUP); // LOW when pressed
  // LEDs - light on HIGH
  pinMode(LEDPowerFailure, OUTPUT);
  pinMode(LEDTemperatureFailure, OUTPUT);
  pinMode(LEDLANFailure, OUTPUT);
  pinMode(LEDDiagnostics, OUTPUT);
  // initialise Serial and SIM800l
  sim800l.begin(9600); // initialize SIM800l module at 9600 bps
  Serial.begin(9600);  // debug messages to serial monitor of Arduino IDE
  delay(500); // wait for proper initialization of the SIM800l 500mS
}
 
void loop()
{
  State = StateOk;

  // check  
  TestButtonState = digitalRead(buttonPin); // if LOW - do diagnostic (Power failure simulation)
  if (TestButtonState == LOW) { // test diagnostic SMS and PowerLow LED simulation
	Serial.println("Diagnostics button pressed.");
	State = State | StateTest;
  }
  
  // check temperature
  int chk = DHT.read11(DHT11Pin);
  if (chk == DHTLIB_OK) {
	TempSensorValue = DHT.temperature;
	if (TempSensorValue > TemperatureAlarmValue) {
		State = State | StateTemperatureFailure;
		Serial.print("Temperature overflow ");
		Serial.println(TempSensorValue, 1);
	}		
  }
    
  // check power down state, read twice after 500ms to avoid brownouts
  PowerSenseInputValue = analogRead(PowerSenseInput) * (DCPowerVoltage / 2.0) / 1024;
  if (PowerSenseInputValue < DCPowerAlarmValue) {
		delay(500); // wait for brownout 500mS
		PowerSenseInputValue = analogRead(PowerSenseInput) * (DCPowerVoltage / 2.0) / 1024;
		if (PowerSenseInputValue < DCPowerAlarmValue) {
			State = State | StatePowerDownFailure;
			Serial.println("Power down.");
		}
	}		

  // check ping state of the server
  // ..
  if (PingFailure) {
	State = State | StatePowerDownFailure;
	Serial.println("Ping failed - server is down.");
  }
  
  // process state
 
  if (sim800l.available()){ // is SIM800l receive SMS or status - dump it back
    Serial.write(sim800l.read()); 
  }
}
 
void SendTextMessage()
{
  Serial.println("Sending Text Message...");
  //
  sim800l.print("AT+CMGF=1\r"); // Set the shield to SMS mode
  delay(100);
  sim800l.print("AT+CMGS=\"+3591234567\"\r");  // put actual number here
  delay(200);
  //
  sim800l.print("Failure is: ");
  // ... by State...
  sim800l.print("\r"); //the content of the message
  delay(500);
  sim800l.print((char)26); //the ASCII code of the ctrl+z is 26 (required ^Z at end of SMS)
  delay(100);
  sim800l.println();
  Serial.println("Text Message Sent.");
  delay(500);
}