The dht11 sensor can recover to the calibrated status gradually when it gets back to the normal operating condition and works within its range. The datasheet mentions it has 3 % humidity accuracy and 0. Nov 04, 2016 this module consist of a dht11 digital humidity and temperature sensor and a 1 k. The sensor dht11 can measure temperature and humidty in a room. Its fairly simple to use, but requires careful timing to grab data. Temperature and humidity module dht11 product manual. When power is supplied to the sensor, do not send any. The dht11 datasheet can be found at the bottom of the page.
One 100nf capacitor can be added between vdd and gnd for wave filtering. Dht11 datasheet, dht11 pdf, dht11 data sheet, dht11 manual, dht11 pdf, dht11, datenblatt, electronics dht11, alldatasheet, free, datasheet, datasheets, data sheet. Publishes the technical specifications of the product data sheet shall prevail. Here is a tutorial on how to retrive the sensor measurement with a arduino board. An open source arduino library for the dht11 temperaturehumidity sensor jdattilodht11lib. Applying the dht11 sensor beyond its working range stated in this datasheet can result in 3 %rh signal shiftdiscrepancy.
The dht22 sensor is far superior over the dht11, it gives far better and more correct readings and handles negative temperature as well. In this project, we will use the ky015 arduino dht11 temperaturehumidity sensor and display it to the arduino ide serial monitor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin no analog input pins needed. The sensor comes with a dedicated ntc to measure temperature and an 8bit microcontroller to. A 10k ohm pullup resistor is needed between the signal line and 5v line to make sure the signal level stays high by default see the datasheet for more info. We recommend powering from 5v sometimes 3v is not enough this is ok even if you are using 3. Feb 19, 2018 the sensor dht11 can measure temperature and humidty in a room. Dht11 temperaturehumidity sensor arduino project hub. Data pin is used to communication between the sensor and the microcontroller. This datasheet is subject to change and may be amended without prior notice. Dht11 datasheet pdf pinout temperature and humidity module. The dht11 uses just one signal wire to transmit data to the arduino. Please refer to 3 of conditions minimum typical maximum.
Otherwise, the line voltage drop will lead to errors in measurement. Raspberry pi dht11 humidity and temperature sensor interface. Sen07 introduction dht22 capacitive humidity sensing digital temperature and humidity module is one that contains the compound has been calibrated digital signal output of the temperature and humidity sensors. Were sorry but dcfrontend doesnt work properly without javascript enabled. Dht11 humidity and temperature digital sensor mr003005. The module is actually a pcb that has dht11 component soldered with a few components, and it is a 3wire module. Dht11 sensor pinout click the image to enlarge it pin identification and configuration. Temperature is probably correct to 2 3 degrees celsius. Each dht11 sensor is strictly calibrated in the laboratory that is extremely accurate on. Attentions of application 1 operating conditions applying the dht11 sensor beyond its working range stated in this datasheet can result in 3%rh signal shiftdiscrepancy.
Dht11 datasheet, dht11 pdf, dht11 pinout, equivalent, replacement temperature and humidity module aosong, schematic, circuit, manual. Temperature and humidity measurement with sensor dht11. Dht11 is a commonly used temperature and humidity sensor. So, while this sensor does seem to work, its not recommended for anything where you care about any sort of guaranteed accuracy. How to set up the dht11 humidity sensor on an arduino. Feb 04, 20 attentions of application 1 operating conditions applying the dht11 sensor beyond its working range stated in this datasheet can result in 3 %rh signal shiftdiscrepancy. Long transmission distance low power consumption 4 pins packaged and fully. In that project, i have mentioned the pin configuration of the dht11 sensor, how to interface it with a microcontroller and how the digital output from the dht11 sensor can be decoded. Dht11 after power power after dht11 1s to wait to cross the unstable state during this period cant send any commands, test environment temperature and humidity data, and record data while the data lines data dht11 pulled by a pullup resistor remains high. Dht11 datasheet pdf pinout temperature and humidity. Dht11, dht22 and am2302 sensors adafruit industries.
Dht11 temperature and humidity sensor tayda electronics. When power is supplied to sensor dont send any instruction to it withing one second to pass unstable status. Dht11 digital temperature and humidity sensor is a composite sensor contains a calibrated. Dht11 digital temperature and humidity sensor is a composite sensor contains a calibrated digital signal. Data pin is detected to an external signal of dht11 low, waiting for external signal low end the. Take readings from the dht11 temperaturehumidity sensor and see them from the arduino ide serial monitor. Although it uses a singlewire to send data it is not dallas one wire compatible. Arduino uno any uno will work, i have a geekcreit uno. Pdf dht11 datasheet, dht11 fiche technique, aosong temperature and humidity module, equivalent, fonction.
The wiring diagramsschematics below shows you how to connect 3 or 4 pin temperature and humidity sensors to the arduino uno. Dht11 humidity and temperature sensor the dht11 is a basic, lowcost digital temperature and humidity sensor. The dht22 has higher resolution but similar protocol. The sensor comes with a dedicated ntc to measure temperature and an 8bit microcontroller to output the values of temperature and humidity as serial data. Aug 01, 2016 simply connect the first pin on the left to 3 5v power, the second pin to your data input pin and the right most pin to ground. If you want multiple sensors, each one must have its own data pin.
One of the biggest down sides is you can only collect data once every 2 seconds. One capacitor valued 100nf can be added between vdd and gnd for wave filtering. If youre using a dht22 or am2302 you can sometimes leave this off skip the third pin the rightmost pin is ground for the data pin you must pick a pin that has pwm support pulseio check the boards guide for what pins. When power is supplied to sensor, dont send any instruction to the sensor within one second to pass unstable status. Technology used to produce the dht11 sensor grants high reliability, excellent longterm stability and very fast response time. Dht11 datasheet, dht11 pdf, dht11 data sheet, dht11 manual, dht11 pdf, dht11. Data pin is detected to an external signal of dht11 low, waiting for external signal low end the delay dht11 data pin in the output state, the output low of 80 microseconds as the response signal, followed by the output of 80 microseconds of high notification peripheral is ready to receive data, the. Dht11 humidity and temperature digital sensor code. So, i suggest you to refer to that project once for more information on dht11 humidity and temperature sensor.
Now nexperia pemi2stdht data line filter, 5 pins, plastic, sot5. The sensor will come as a 4pin package out of which only three pins will be used. The dht11 uses an internal thermistor and a capacitive humidity sensor to determine environment conditions, an internal chip is responsible for converting readings to a serial digital signal. This datasheet is a translated version of the manufacturers datasheet. Dht11dht22 sensors with arduino tutorial 2 examples. This project is really simple and shouldnt take us very long. Note that many types of those sensors exist, i had a 3 pin type, they also exist with 4 pins. Temperature and humidity module department of electrical and. Dht11 datasheet, dht11 pdf, dht11 data sheet, dht11 manual, dht11 pdf. Outputs both temperature and humidity through serial data. Dht11 this time the data pin is the input state, always detect external signals. It is convenient to connect and special packages can be provided according to users request.
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