Detect temperature, humidity, heat index, atmospheric pressure and altitude unsing a DHT11 sensor and a BMP180 sensor on an arduino uno

DHT

• digital humidity and temperature sensor
• This bad boy detects the humidity and temperature.
• humidity between 20% and 90%.
• temperature between 0°C and 50°C.
• temperature resolution 1°C.
• between 3 to 5.5 V.
• if the connexion cable is < 20 m, add a 5K pull-up resistor.
• sampling period = 1 second.
• ...see datasheet for pinning

BMP

• barometric pressure sensor
• The BMP180 sensor is able to detect barometric pressure, altitude and temperature.
• pressure range 300 to 1100 hPa.
• pressure resolution 0.01 hPa.
• between 1.8 to 3.6 V. (do not connect to the 5V on the board otherwise it will fry the sensor)
• temperature resolution 0.5°C. (more precise than the DHT so use this one for measuring temperature)
• SDA = serial data bus (I2C)
• SCL = serial clock input bus (I2C)
• ...see datasheet for pinning