Commit inicial da estação meteorolog

 Contém esquemáticos, programa em python de controle e registro
 e firmware para o Arduino de interface com os sensores
 DHT11 - Temperatura e Umidade do Ar
 BMP085 Pressão e Temperatura
 LRD - Luminosidade
 Condutividade do solo

esquematicos/arduino_shieldsNCL.lib

+EESchema-LIBRARY Version 2.3  Date: 1/9/2011 10:16:29 PM
+#
+# ARDUINO_MEGA_SHIELD
+#
+DEF ARDUINO_MEGA_SHIELD SHIELD 0 40 Y Y 1 F N
+F0 "SHIELD" -400 2500 60 H V C CNN
+F1 "ARDUINO_MEGA_SHIELD" -100 -2700 60 H V C CNN
+DRAW
+T 0 0 750 60 0 0 0 Arduino  Normal 0 C C
+T 0 0 650 60 0 0 0 MEGA  Normal 0 C C
+S -700 -2600 600 2450 0 1 0 N
+P 3 0 1 0  -600 700  500 700  500 700 N
+X RX0 0 900 750 300 L 50 50 1 1 B
+X TX0 1 900 850 300 L 50 50 1 1 B
+X 2 2 900 950 300 L 50 50 1 1 B
+X 3 3 900 1050 300 L 50 50 1 1 B
+X 4 4 900 1150 300 L 50 50 1 1 B
+X 5 5 900 1250 300 L 50 50 1 1 B
+X 6 6 900 1350 300 L 50 50 1 1 B
+X 7 7 900 1450 300 L 50 50 1 1 B
+X 8 8 900 1650 300 L 50 50 1 1 B
+X 9 9 900 1750 300 L 50 50 1 1 B
+X 10 10 900 1850 300 L 50 50 1 1 B
+X SDA 20 900 -50 300 L 50 50 1 1 B
+X PC7 30 900 -1500 300 L 50 50 1 1 B
+X PG1 40 -1000 -2250 300 R 50 50 1 1 B
+X PB3_(MISO) 50 -1000 -1150 300 R 50 50 1 1 B
+X 11 11 900 1950 300 L 50 50 1 1 B
+X SCL 21 900 -150 300 L 50 50 1 1 B
+X PC6 31 900 -1600 300 L 50 50 1 1 B
+X PG0 41 -1000 -2150 300 R 50 50 1 1 B
+X PB2_(MOSI) 51 -1000 -1050 300 R 50 50 1 1 B
+X 12 12 900 2050 300 L 50 50 1 1 B
+X PA0 22 900 -650 300 L 50 50 1 1 B
+X PC5 32 900 -1700 300 L 50 50 1 1 B
+X PL7 42 -1000 -2000 300 R 50 50 1 1 B
+X PB1_(SCK) 52 -1000 -950 300 R 50 50 1 1 B
+X 13 13 900 2150 300 L 50 50 1 1 B
+X PA1 23 900 -750 300 L 50 50 1 1 B
+X PC4 33 900 -1800 300 L 50 50 1 1 B
+X PL6 43 -1000 -1900 300 R 50 50 1 1 B
+X PB0_(SS) 53 -1000 -850 300 R 50 50 1 1 B
+X TX3 14 900 550 300 L 50 50 1 1 B
+X PA2 24 900 -850 300 L 50 50 1 1 B
+X PC3 34 900 -1900 300 L 50 50 1 1 B
+X PL5 44 -1000 -1800 300 R 50 50 1 1 B
+X RX3 15 900 450 300 L 50 50 1 1 B
+X PA3 25 900 -950 300 L 50 50 1 1 B
+X PC2 35 900 -2000 300 L 50 50 1 1 B
+X PL4 45 -1000 -1700 300 R 50 50 1 1 B
+X TX2 16 900 350 300 L 50 50 1 1 B
+X PA4 26 900 -1050 300 L 50 50 1 1 B
+X PC1 36 900 -2100 300 L 50 50 1 1 B
+X PL3 46 -1000 -1600 300 R 50 50 1 1 B
+X RX2 17 900 250 300 L 50 50 1 1 B
+X PA5 27 900 -1150 300 L 50 50 1 1 B
+X PC0 37 900 -2200 300 L 50 50 1 1 B
+X PL2 47 -1000 -1500 300 R 50 50 1 1 B
+X TX1 18 900 150 300 L 50 50 1 1 B
+X PA6 28 900 -1250 300 L 50 50 1 1 B
+X PD7 38 -1000 -2450 300 R 50 50 1 1 B
+X PL1 48 -1000 -1400 300 R 50 50 1 1 B
+X RX1 19 900 50 300 L 50 50 1 1 B
+X PA7 29 900 -1350 300 L 50 50 1 1 B
+X PG2 39 -1000 -2350 300 R 50 50 1 1 B
+X PL0 49 -1000 -1300 300 R 50 50 1 1 B
+X 5V 5V -1000 1750 300 R 50 50 1 1 W
+X AD0 AD0 -1000 1250 300 R 50 50 1 1 B
+X AD1 AD1 -1000 1150 300 R 50 50 1 1 B
+X AD2 AD2 -1000 1050 300 R 50 50 1 1 B
+X AD3 AD3 -1000 950 300 R 50 50 1 1 B
+X 3V3 3V3 -1000 1850 300 R 50 50 1 1 W
+X AD4 AD4 -1000 850 300 R 50 50 1 1 B
+X AD5 AD5 -1000 750 300 R 50 50 1 1 B
+X AD6 AD6 -1000 650 300 R 50 50 1 1 B
+X AD7 AD7 -1000 550 300 R 50 50 1 1 B
+X AD8 AD8 -1000 350 300 R 50 50 1 1 B
+X AD9 AD9 -1000 250 300 R 50 50 1 1 B
+X RST RST -1000 1950 300 R 50 50 1 1 I
+X AD10 AD10 -1000 150 300 R 50 50 1 1 B
+X AD11 AD11 -1000 50 300 R 50 50 1 1 B
+X GND1 GND1 -1000 1650 300 R 50 50 1 1 W
+X AD12 AD12 -1000 -50 300 R 50 50 1 1 B
+X GND2 GND2 -1000 1550 300 R 50 50 1 1 W
+X AD13 AD13 -1000 -150 300 R 50 50 1 1 B
+X GND3 GND3 900 2250 300 L 50 50 1 1 W
+X AD14 AD14 -1000 -250 300 R 50 50 1 1 B
+X GND4 GND4 -1000 -600 300 R 50 50 1 1 W
+X 5V_4 5V_4 900 -400 300 L 50 50 1 1 W
+X AD15 AD15 -1000 -350 300 R 50 50 1 1 B
+X GND5 GND5 -1000 -700 300 R 50 50 1 1 W
+X 5V_5 5V_5 900 -500 300 L 50 50 1 1 W
+X AREF AREF 900 2350 300 L 50 50 1 1 W
+X V_IN V_IN -1000 1450 300 R 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
+# ARDUINO_SHIELD
+#
+DEF ARDUINO_SHIELD SHIELD 0 40 Y Y 1 F N
+F0 "SHIELD" -350 950 60 H V C CNN
+F1 "ARDUINO_SHIELD" 50 -950 60 H V C CNN
+DRAW
+S -650 -900 650 900 0 1 0 N
+X 0 0 950 -800 300 L 50 50 1 1 B
+X 1 1 950 -700 300 L 50 50 1 1 B
+X 2 2 950 -600 300 L 50 50 1 1 B
+X 3 3 950 -500 300 L 50 50 1 1 B
+X 4 4 950 -400 300 L 50 50 1 1 B
+X 5 5 950 -300 300 L 50 50 1 1 B
+X 6 6 950 -200 300 L 50 50 1 1 B
+X 7 7 950 -100 300 L 50 50 1 1 B
+X 8 8 950 100 300 L 50 50 1 1 B
+X 9 9 950 200 300 L 50 50 1 1 B
+X 10 10 950 300 300 L 50 50 1 1 B
+X 11 11 950 400 300 L 50 50 1 1 B
+X 12 12 950 500 300 L 50 50 1 1 B
+X 13 13 950 600 300 L 50 50 1 1 B
+X 5V 5V -950 200 300 R 50 50 1 1 W
+X AD0 AD0 -950 -300 300 R 50 50 1 1 B
+X AD1 AD1 -950 -400 300 R 50 50 1 1 B
+X AD2 AD2 -950 -500 300 R 50 50 1 1 B
+X AD3 AD3 -950 -600 300 R 50 50 1 1 B
+X 3V3 3V3 -950 300 300 R 50 50 1 1 W
+X AD4 AD4 -950 -700 300 R 50 50 1 1 B
+X AD5 AD5 -950 -800 300 R 50 50 1 1 B
+X RST RST -950 400 300 R 50 50 1 1 I
+X GND1 GND1 -950 100 300 R 50 50 1 1 W
+X GND2 GND2 -950 0 300 R 50 50 1 1 W
+X GND3 GND3 950 700 300 L 50 50 1 1 W
+X AREF AREF 950 800 300 L 50 50 1 1 W
+X V_IN V_IN -950 -100 300 R 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
+#End Library

esquematicos/estacao-meteorologica-CTA.sch

+EESchema Schematic File Version 2  date Seg 04 Mar 2013 21:35:54 BRT
+LIBS:power
+LIBS:device
+LIBS:transistors
+LIBS:conn
+LIBS:linear
+LIBS:regul
+LIBS:74xx
+LIBS:cmos4000
+LIBS:adc-dac
+LIBS:memory
+LIBS:xilinx
+LIBS:special
+LIBS:microcontrollers
+LIBS:dsp
+LIBS:microchip
+LIBS:analog_switches
+LIBS:motorola
+LIBS:texas
+LIBS:intel
+LIBS:audio
+LIBS:interface
+LIBS:digital-audio
+LIBS:philips
+LIBS:display
+LIBS:cypress
+LIBS:siliconi
+LIBS:opto
+LIBS:atmel
+LIBS:contrib
+LIBS:valves
+LIBS:arduino_shieldsNCL
+EELAYER 24  0
+EELAYER END
+$Descr A4 11700 8267
+Sheet 1 1
+Title ""
+Date "4 mar 2013"
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+Text Notes 650  7700 0    60   ~ 0
+Centro de Tecnologia Academica - http://cta.if.ufrgs.br
+Text Notes 650  7550 0    60   ~ 0
+Rafael Pezzi
+Text Notes 7500 7550 0    60   ~ 0
+Estacao Meteorológica - CTA
+Connection ~ 4300 4600
+Wire Wire Line
+	4300 4600 4500 4600
+Wire Wire Line
+	4500 4600 4500 4250
+Wire Wire Line
+	4500 4250 4900 4250
+Connection ~ 4300 3650
+Wire Wire Line
+	4300 3950 4300 3650
+Wire Wire Line
+	7750 3150 7150 3150
+Wire Wire Line
+	7150 3150 7150 3250
+Wire Wire Line
+	7150 3250 6800 3250
+Wire Wire Line
+	4900 3550 4800 3550
+Wire Wire Line
+	4800 3550 4800 5400
+Wire Wire Line
+	4800 5400 5500 5400
+Wire Wire Line
+	5500 5700 4700 5700
+Wire Wire Line
+	4700 5700 4700 4650
+Wire Wire Line
+	4700 4650 4900 4650
+Wire Wire Line
+	3900 3850 4050 3850
+Wire Wire Line
+	4050 3850 4400 3850
+Wire Wire Line
+	4400 3850 4400 4950
+Wire Wire Line
+	4400 4950 7250 4950
+Wire Wire Line
+	7250 4950 7250 4250
+Wire Wire Line
+	7250 4250 6800 4250
+Wire Wire Line
+	3900 3650 4300 3650
+Wire Wire Line
+	4300 3650 4900 3650
+Wire Wire Line
+	7750 2950 7400 2950
+Wire Wire Line
+	7400 2950 7400 2700
+Wire Wire Line
+	7400 2700 4500 2700
+Wire Wire Line
+	4500 2700 4500 4150
+Wire Wire Line
+	4500 4150 4900 4150
+Wire Wire Line
+	4900 3750 4150 3750
+Wire Wire Line
+	3900 4150 4150 4150
+Wire Wire Line
+	4250 3150 4050 3150
+Wire Wire Line
+	4050 3150 4050 3850
+Connection ~ 4050 3850
+Wire Wire Line
+	4900 4550 4550 4550
+Wire Wire Line
+	4550 4550 4550 5850
+Wire Wire Line
+	4550 5850 5500 5850
+Wire Wire Line
+	4150 5550 5500 5550
+Wire Wire Line
+	4150 3750 4150 4150
+Wire Wire Line
+	4150 4150 4150 5550
+Connection ~ 4150 4150
+Wire Wire Line
+	6800 3150 7000 3150
+Wire Wire Line
+	7000 3150 7000 3050
+Wire Wire Line
+	7000 3050 7400 3050
+Wire Wire Line
+	7400 3050 7750 3050
+Wire Wire Line
+	7400 4250 7400 4250
+Wire Wire Line
+	7400 4250 7400 3050
+Connection ~ 7400 3050
+Wire Wire Line
+	4300 4450 4300 4600
+Wire Wire Line
+	4300 4600 4300 5100
+$Comp
+L R R1
+U 1 1 5134BB7E
+P 4300 4200
+F 0 "R1" V 4380 4200 50  0000 C CNN
+F 1 "100k" V 4300 4200 50  0000 C CNN
+	1    4300 4200
+	-1   0    0    1   
+$EndComp
+Text Notes 5550 5900 0    60   ~ 0
+SDA
+Text Notes 5550 5750 0    60   ~ 0
+SCL
+Text Notes 5550 5600 0    60   ~ 0
+GND
+Text Notes 5550 5450 0    60   ~ 0
+Vcc - 3.3 V
+Text Notes 4850 5300 0    60   ~ 0
+BMP085 - Temperatura e Pressão
+$Comp
+L PHOTORESISTOR LDR1
+U 1 1 5134B800
+P 8000 4450
+F 0 "LDR1" H 8010 4770 70  0000 C CNN
+F 1 "LDR" H 8010 4130 70  0000 C CNN
+	1    8000 4450
+	-1   0    0    1   
+$EndComp
+$Comp
+L R R2
+U 1 1 5134B78D
+P 4250 3400
+F 0 "R2" V 4330 3400 50  0000 C CNN
+F 1 "4k7" V 4250 3400 50  0000 C CNN
+	1    4250 3400
+	1    0    0    -1  
+$EndComp
+Text Notes 3350 4150 0    60   ~ 0
+4 - GND
+Text Notes 3350 4000 0    60   ~ 0
+3 - NC
+Text Notes 3350 3850 0    60   ~ 0
+2 - Data
+Text Notes 3350 3700 0    60   ~ 0
+1 - Vcc
+Text Notes 3450 3550 0    60   ~ 0
+DHT11
+Text Notes 7800 3000 0    60   ~ 0
+sig
+Text Notes 7800 3100 0    60   ~ 0
+gnd
+Text Notes 7800 3200 0    60   ~ 0
+vcc
+Text Notes 7500 2900 0    60   ~ 0
+Sensor Umidade do Solo
+$Comp
+L ARDUINO_SHIELD Arduino~Uno
+U 0 1 512FBC7E
+P 5850 3850
+F 0 "Arduino Uno" H 5850 4850 60  0000 C CNN
+F 1 "ARDUINO1" H 5900 2900 60  0000 C CNN
+	0    5850 3850
+	1    0    0    -1  
+$EndComp
+Text Notes 10650 7650 0    60   ~ 0
+0.1
+Wire Wire Line
+	7400 4650 7400 5100
+Wire Wire Line
+	7400 5100 4300 5100
+Text Notes 3300 3400 0    60   ~ 0
+Umidade do Ar
+$EndSCHEMATC

meteorolog.ino

+
+// Interface de controle da estacao meteorologica meteorolog
+// Centro de Tecnologia Academica - UFRGS
+// http://cta.if.ufrgs.br - Março de 2013
+// Rafael Pezzi
+
+int soloPinVCC = 13; //Pino VCC do sensor de umidade do solo
+int soloPinleitura = 0; //Pino VCC do sensor de umidade do solo
+
+#define LDRpin 1
+#define PinoPiezo 9
+#define DHTPIN 4     // Pino de dados do DHT11
+
+// Para utilização do DHT11
+// Biblioteca desenvolvida por Adafuit
+// https://github.com/adafruit/DHT-sensor-library
+#include "DHT.h"
+#define DHTTYPE DHT11   
+DHT dht(DHTPIN, DHTTYPE);
+
+// Configuracao do BMP085
+// Fonte: http://bildr.org/2011/06/bmp085-arduino/
+#include <Wire.h>
+#define BMP085_ADDRESS 0x77  // I2C address of BMP085
+const unsigned char OSS = 0;  // Oversampling Setting
+
+// Calibration values
+int ac1;
+int ac2;
+int ac3;
+unsigned int ac4;
+unsigned int ac5;
+unsigned int ac6;
+int b1;
+int b2;
+int mb;
+int mc;
+int md;
+
+// b5 is calculated in bmp085GetTemperature(...), this variable is also used in bmp085GetPressure(...)
+// so ...Temperature(...) must be called before ...Pressure(...).
+long b5; 
+
+
+void setup()   { 
+
+  //Inicialização do DHT11  
+  dht.begin();
+ 
+  // Configuração do BPM085
+  Wire.begin();
+  bmp085Calibration();
+  
+  Serial.begin(115200);  
+
+  // Configura pino de alimentação do sensor de umidade do solo
+  pinMode(soloPinVCC, OUTPUT);     
+}
+
+void loop()                     
+{
+
+    if (Serial.available())
+  {
+    switch (Serial.read())
+    {
+    case 'p':
+      pressao();
+      break;
+    case 'l':
+      luminosidade();
+      break;
+    case 'u':
+      umidade_ar();
+      break;
+    case 's':
+      umidade_solo();      
+      break;
+    case 't':
+      temperatura_BMP085();
+      break;
+    case 'T':
+      leDHT11_temp();
+      break;
+    default:
+      break;
+    }
+  }
+}
+
+
+void temperatura_BMP085()
+{
+  float temperature = bmp085GetTemperature(bmp085ReadUT()); //MUST be called first
+  Serial.println(temperature, 2); //display 2 decimal places
+}
+
+void pressao()
+{
+  float temperature = bmp085GetTemperature(bmp085ReadUT()); //MUST be called first
+  float pressure = bmp085GetPressure(bmp085ReadUP());
+  Serial.println(pressure, 0); //whole number only.
+
+}
+
+void umidade_ar()
+{
+  leDHT11_umid();  
+}
+
+void luminosidade()
+{
+ int lum=analogRead(LDRpin);
+ Serial.println(1023-lum);
+}
+
+void umidade_solo()
+{
+  digitalWrite(soloPinVCC,HIGH);
+  delay(300);
+  int us1 = analogRead(soloPinleitura);
+  delay(10);
+  int us2 = analogRead(soloPinleitura);
+  delay(10);
+  int us3 = analogRead(soloPinleitura);
+  delay(10);
+  int us4 = analogRead(soloPinleitura);
+  delay(10);
+  int us5 = analogRead(soloPinleitura);
+  int umidsolo = (us1+us2+us3+us4+us5)/5;  
+//  Serial.print("Umidade do solo: ");
+  Serial.println(umidsolo);
+  digitalWrite(soloPinVCC,LOW);
+}
+
+
+void leDHT11_temp()
+{
+  // Reading temperature or humidity takes about 250 milliseconds!
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  float t = dht.readTemperature();
+
+  // check if returns are valid, if they are NaN (not a number) then something went wrong!
+  if (isnan(t) ) {
+    Serial.println("Failed to read from DHT");
+  } else {
+//    Serial.print("Temperatura: "); 
+    Serial.println(t);
+//    Serial.println(" *C");
+  }
+
+}
+
+void leDHT11_umid()
+{
+  // Reading temperature or humidity takes about 250 milliseconds!
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  float h = dht.readHumidity();
+
+  // check if returns are valid, if they are NaN (not a number) then something went wrong!
+  if (isnan(h)) {
+    Serial.println("Failed to read from DHT");
+  } else {
+  //  Serial.print("Umidade relativa do ar: "); 
+    Serial.println(h);
+//    Serial.println(" %\t");
+  }
+
+}
+
+// Stores all of the bmp085's calibration values into global variables
+// Calibration values are required to calculate temp and pressure
+// This function should be called at the beginning of the program
+void bmp085Calibration()
+{
+  ac1 = bmp085ReadInt(0xAA);
+  ac2 = bmp085ReadInt(0xAC);
+  ac3 = bmp085ReadInt(0xAE);
+  ac4 = bmp085ReadInt(0xB0);
+  ac5 = bmp085ReadInt(0xB2);
+  ac6 = bmp085ReadInt(0xB4);
+  b1 = bmp085ReadInt(0xB6);
+  b2 = bmp085ReadInt(0xB8);
+  mb = bmp085ReadInt(0xBA);
+  mc = bmp085ReadInt(0xBC);
+  md = bmp085ReadInt(0xBE);
+}
+
+// Calculate temperature in deg C
+float bmp085GetTemperature(unsigned int ut){
+  long x1, x2;
+
+  x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15;
+  x2 = ((long)mc << 11)/(x1 + md);
+  b5 = x1 + x2;
+
+  float temp = ((b5 + 8)>>4);
+  temp = temp /10;
+
+  return temp;
+}
+
+// Calculate pressure given up
+// calibration values must be known
+// b5 is also required so bmp085GetTemperature(...) must be called first.
+// Value returned will be pressure in units of Pa.
+long bmp085GetPressure(unsigned long up){
+  long x1, x2, x3, b3, b6, p;
+  unsigned long b4, b7;
+
+  b6 = b5 - 4000;
+  // Calculate B3
+  x1 = (b2 * (b6 * b6)>>12)>>11;
+  x2 = (ac2 * b6)>>11;
+  x3 = x1 + x2;
+  b3 = (((((long)ac1)*4 + x3)<<OSS) + 2)>>2;
+
+  // Calculate B4
+  x1 = (ac3 * b6)>>13;
+  x2 = (b1 * ((b6 * b6)>>12))>>16;
+  x3 = ((x1 + x2) + 2)>>2;
+  b4 = (ac4 * (unsigned long)(x3 + 32768))>>15;
+
+  b7 = ((unsigned long)(up - b3) * (50000>>OSS));
+  if (b7 < 0x80000000)
+    p = (b7<<1)/b4;
+  else
+    p = (b7/b4)<<1;
+
+  x1 = (p>>8) * (p>>8);
+  x1 = (x1 * 3038)>>16;
+  x2 = (-7357 * p)>>16;
+  p += (x1 + x2 + 3791)>>4;
+
+  long temp = p;
+  return temp;
+}
+
+// Read 1 byte from the BMP085 at 'address'
+char bmp085Read(unsigned char address)
+{
+  unsigned char data;
+
+  Wire.beginTransmission(BMP085_ADDRESS);
+  Wire.write(address);
+  Wire.endTransmission();
+
+  Wire.requestFrom(BMP085_ADDRESS, 1);
+  while(!Wire.available())
+    ;
+
+  return Wire.read();
+}
+
+// Read 2 bytes from the BMP085
+// First byte will be from 'address'
+// Second byte will be from 'address'+1
+int bmp085ReadInt(unsigned char address)
+{
+  unsigned char msb, lsb;
+
+  Wire.beginTransmission(BMP085_ADDRESS);
+  Wire.write(address);
+  Wire.endTransmission();
+
+  Wire.requestFrom(BMP085_ADDRESS, 2);
+  while(Wire.available()<2)
+    ;
+  msb = Wire.read();
+  lsb = Wire.read();
+
+  return (int) msb<<8 | lsb;
+}
+
+// Read the uncompensated temperature value
+unsigned int bmp085ReadUT(){
+  unsigned int ut;
+
+  // Write 0x2E into Register 0xF4
+  // This requests a temperature reading
+  Wire.beginTransmission(BMP085_ADDRESS);
+  Wire.write(0xF4);
+  Wire.write(0x2E);
+  Wire.endTransmission();
+
+  // Wait at least 4.5ms
+  delay(5);
+
+  // Read two bytes from registers 0xF6 and 0xF7
+  ut = bmp085ReadInt(0xF6);
+  return ut;
+}
+
+// Read the uncompensated pressure value
+unsigned long bmp085ReadUP(){
+
+  unsigned char msb, lsb, xlsb;
+  unsigned long up = 0;
+