DHT11 Temperature and Humidity Sensor Module with Cable for Arduino Uno Raspberry Pi 2 3 3B RPi3 ESP-12E

Description

Difference between DHT11 Sensor and module: The DHT11 sensor can either be purchased as a sensor or as a module. Either way, the performance of the sensor is same. The sensor will come as a 4-pin package out of which only three pins will be used whereas the module will come with three pins as shown above. The only difference between the sensor and module is that the module will have a filtering capacitor and pull-up resistor inbuilt, and for the sensor, you have to use them externally if required Technical Specification Operating Voltage: 3.3~5.5V DC Operating current: 0.3mA (measuring) 60uA (standby) Output: the single bus digital signal Temperature Range: 0°C to 50°C Humidity Range: 20% to 90% The measurement accuracy of +&-5%RH humidity, temperature ±2°C Resolution: 1%RH humidity, temperature 1 °C Exchangeability: fully interchangeable Long term stability: +&-1% RH per year Operating specification (1) Power and Pins Power's voltage should be 3-5.5V DC. When power is supplied to sensor, don't send any instruction to the sensor within one second to pass unstable status. One capacitor valued 100nF can be added between VDD and GND for power filtering. (2)Communication and signal Single-bus data is used for communication between MCU and DHT11. Applications: Measure temperature and humidity Local Weather station Automatic climate control Environment monitoring Noted: If you want use these on Arduino, you'll need to install a DHT library (or use an IDE with one installed. Or write your own). Make sure you have a very very very stable power supply, otherwise readings are off the charts Don't buy these if you're looking for precision, but if you want something cheap and easy to set up then this isn't a bad choice.