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C programming language
C (/ˈsiː/, as in the letter c) is a general-purpose, procedural computer programming language supporting structured programming, lexical variable scope, and recursion, with a static type system. By design, C provides constructs that map efficiently to typical machine instructions.
1) DHT11/DHT22 Temperature and Humidity Sensor.
1) DHT11/DHT22 Temperature and Humidity Sensor These DHTXX sensors are very popular among the Arduino Tinkerers. The DHT sensors are inexpensive sensors for measuring temperature and humidity. These sensors contain a chip that does analog to digital conversion and spits out a digital signal with the temperature and humidity. Specifications DHT11 vs DHT22 There are two versions of the DHT sensor: DHT11 Range: 20-90% Absolute accuracy: ±5% Repeatability: ±1% Long term stability: ±1% per year Price: $1 to $5 DHT22 Range: 0-100% Absolute accuracy: ±2% Repeatability: ±1% Long term stability: ±0.5% per year Price: $4 to $10 As you can see from the specs above, the DHT22 is a bit more accurate. Arduino with DHT11 Sensor For this example you need the following components. Arduino UNO 1x DHT11 Breadboard 10KΩ Resistor (or 4.7KΩ) Jumper Wires Schematic Here’s ho...
Sensors tutorials
INDEX 1) DHT11/DHT22 Temperature and Humidity Sensor. 2) BMP180 Barometric Sensor . 3) FC-37 or YL-83 Rain Sensor. 4) YL-69 or HL-69 Soil Moisture Sensor. 5) DS18B20 Temperature Sensor. 6) DS1307 or DS3231 Real Time Clock (RTC). 7) MQ-2 Gas/Smoke Sensor. 8) HC-SR04 Ultrasonic Sensor. 9) PIR Motion Sensor. 10) Tilt Sensor. 11) Microphone Sound Sensor. 12) Reed Switch . 13) MRFC522 RFID. 14) Relay Module. 15) nRF24L01. 16) 433 MHz Transmitter/Receiver . 17) 8x8 Dot Matrix . 18) WS2812B Addressable RGB LED Strip. 19) Membrane Keypad. 20) 1.8 TFT Display. 21) SIM900 GSM GPRS Shield. 22) SD Card Module. 23) TCS3200 color sensor .