DHT11 TEMPERATURE AND HUMIDITY SENSOR MODULE

Description:

Temperature and humidity measurements are a nice addition to many hobby projects. But [Rajendra Bhatt] makes the point that many of these sensors have a price tag that is well above what most hobbiests are willing to spend. He decided to take an in-depth look at the DHT11 sensor; 

The four-pin device uses a 1-wire protocol. [Rajendra] discusses the ins and outs of the communicationsdemonstrating the part using a PIC 16F628. It’s a snap to connect to your projectrequiring VCCGNDand a pull-up resistor on the single data line. We’ve already seen it used on at least one projectand hope to see more of this little guy in your own hacks

Specification :

• Temperature range: 0°C to 50°C
• Temperature accuracy: ±2°C
• Humidity range: 20% to 90% RH
• Humidity accuracy: ±5% RH
• Supply voltage: 3V to 5.5V DC
• Current consumption: 2.5mA (max)
• Sampling rate: 1Hz
• Interface: 1-wire interface
• Dimensions: 12mm x 15.5mm x 5.5mm