/************************************************************************** This is an example for our Monochrome OLEDs based on SSD1306 drivers Pick one up today in the adafruit shop! ------> http://www.adafruit.com/category/63_98 This example is for a 128x32 pixel display using I2C to communicate 3 pins are required to interface (two I2C and one reset). Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Limor Fried/Ladyada for Adafruit Industries, with contributions from the open source community. BSD license, check license.txt for more information All text above, and the splash screen below must be included in any redistribution. **************************************************************************/ // Pinout DHT11/DHT22 // From left to right // 1 : VCC (5V) // 2 : SIGnal // 3 : NC Not connected // 4 : GND #include #include #include #include #include dht11 DHT11; #define DHT11PIN 2 int ledWP = 11; int ledCV = 12; int thermostaat = 7; #define SCREEN_WIDTH 128 // OLED display width, in pixels #define SCREEN_HEIGHT 64 // OLED display height, in pixels // Declaration for an SSD1306 display connected to I2C (SDA, SCL pins) #define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin) was 4 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); #define NUMFLAKES 10 // Number of snowflakes in the animation example #define LOGO_HEIGHT 16 #define LOGO_WIDTH 16 static const unsigned char PROGMEM logo_bmp[] = { B00000000, B00000000, B00000000, B00000000, B11111111, B11110000, B11111111, B11111000, B11000000, B10001100, B11000000, B10000110, B11000000, B10000011, B11111110, B10000011, B11111110, B10000011, B11000000, B10000011, B11000100, B10010110, B11000010, B10101100, B11000001, B11011000, B11000000, B10110000, B11111111, B11111111, B00000000, B0000000 }; void setup() { pinMode(ledCV, OUTPUT); pinMode(ledWP, OUTPUT); Serial.begin(115200); Serial.println("DHT11 TEST PROGRAM "); Serial.print("LIBRARY VERSION: "); Serial.println(DHT11LIB_VERSION); Serial.println(); // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64 0x3C Serial.println(F("SSD1306 allocation failed")); for (;;); // Don't proceed, loop forever } // Show initial display buffer contents on the screen -- // the library initializes this with an Adafruit splash screen. display.display(); delay(2000); // Pause for 2 seconds // Clear the buffer display.clearDisplay(); // Draw a single pixel in white display.drawPixel(10, 10, SSD1306_WHITE); // Show the display buffer on the screen. You MUST call display() after // drawing commands to make them visible on screen! display.display(); delay(2000); // display.display() is NOT necessary after every single drawing command, // unless that's what you want...rather, you can batch up a bunch of // drawing operations and then update the screen all at once by calling // display.display(). These examples demonstrate both approaches... // Invert and restore display, pausing in-between display.invertDisplay(true); delay(1000); display.invertDisplay(false); delay(1000); } void loop() { Serial.println("\n"); int chk = DHT11.read(DHT11PIN); Serial.print("Read sensor: "); switch (chk) { case DHTLIB_OK: Serial.println("OK"); break; case DHTLIB_ERROR_CHECKSUM: Serial.println("Checksum error"); break; case DHTLIB_ERROR_TIMEOUT: Serial.println("Time out error"); break; default: Serial.println("Unknown error"); break; } Serial.print("Humidity (%): "); Serial.println((float)DHT11.humidity, 2); Serial.print("Temperature (C): "); Serial.println((float)DHT11.temperature, 2); display.clearDisplay(); display.setTextSize(1); // Normal 1:1 pixel scale display.setTextColor(SSD1306_WHITE); // Draw white text display.setCursor(10, 20); // Start at top-left corner display.println(F("Temperature (oC): ")); display.setCursor(10, 40); int temp = DHT11.temperature; if (temp < 22) { digitalWrite(ledCV, digitalRead(thermostaat)); digitalWrite(ledWP, not (digitalRead(thermostaat))); Serial.println(digitalRead(thermostaat)); } if (temp >= 22) { digitalWrite(ledWP, digitalRead(thermostaat)); digitalWrite(ledCV, not (digitalRead(thermostaat))); Serial.println(digitalRead(thermostaat)); } display.setTextSize(2); display.println(temp); display.display(); Serial.print("Temperature (oF): "); Serial.println(Fahrenheit(DHT11.temperature), 2); Serial.print("Temperature (K): "); Serial.println(Kelvin(DHT11.temperature), 2); Serial.print("Dew Point (oC): "); Serial.println(dewPoint(DHT11.temperature, DHT11.humidity)); Serial.print("Dew PointFast (oC): "); Serial.println(dewPointFast(DHT11.temperature, DHT11.humidity)); delay(2000); } //Celsius to Kelvin conversion double Kelvin(double celsius) { return celsius + 273.15; } // dewPoint function NOAA // reference: http://wahiduddin.net/calc/density_algorithms.htm double dewPoint(double celsius, double humidity) { double A0 = 373.15 / (273.15 + celsius); double SUM = -7.90298 * (A0 - 1); SUM += 5.02808 * log10(A0); SUM += -1.3816e-7 * (pow(10, (11.344 * (1 - 1 / A0))) - 1) ; SUM += 8.1328e-3 * (pow(10, (-3.49149 * (A0 - 1))) - 1) ; SUM += log10(1013.246); double VP = pow(10, SUM - 3) * humidity; double T = log(VP / 0.61078); // temp var return (241.88 * T) / (17.558 - T); } // delta max = 0.6544 wrt dewPoint() // 5x faster than dewPoint() // reference: http://en.wikipedia.org/wiki/Dew_point double dewPointFast(double celsius, double humidity) { double a = 17.271; double b = 237.7; double temp = (a * celsius) / (b + celsius) + log(humidity / 100); double Td = (b * temp) / (a - temp); return Td; } //Celsius to Fahrenheit conversion double Fahrenheit(double celsius) { return 1.8 * celsius + 32; } // fast integer version with rounding //int Celcius2Fahrenheit(int celcius) //{ // return (celsius * 18 + 5)/10 + 32; //}