joy-it DHT11 Temperature And Humidity Sensor User Manual

: October 31, 2023
: JOY-It

Table of Contents

joy-it DHT11 Temperature And Humidity Sensor
Product Information
Product Usage Instructions
GENERAL INFORMATION
BASIC INFORMATION
USE WITH THE ARDUINO
USE WITH THE RASPBERRY Pl
USAGE WITH MICRO:BIT
USAGE WITH RASPBERRY Pl PICO
ADDITIONAL INFORMATION
SUPPORT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

joy-it DHT11 Temperature And Humidity Sensor

joy-it-DHT11-Temperature-And-Humidity-Sensor-product

Product Information

The product is a temperature and humidity sensor that uses the DHT11 sensor. It can be connected to a microcontroller or single board computer like the Raspberry Pi. The sensor provides accurate temperature and humidity readings.

Product Usage Instructions

For Arduino

Include the necessary libraries: #include <Adafruit_Sensor.h>, #include <DHT.h>, #include <DHT_U.h>
Define the DHT sensor pin: #define DHTPIN <pin_number>
Define the DHT sensor type: #define DHTTYPE DHT11
Initialize the device: Serial.begin(9600);
Begin the DHT sensor: dht.begin();
Print temperature sensor details: `Serial.println(F("DHTxx Unified Sensor Example"));```

For Raspberry Pi (MicroPython)

Load necessary libraries: from machine import Pin, from utime import sleep, from dht import DHT11
Initialize GPIO and DHT11 sensor: dht11_sensor = DHT11(Pin(14, Pin.IN, Pin.PULL_UP))
- Perform measurement and read values: dht11_sensor.measure(), temp = ``dht11_sensor.temperature(), humi = dht11_sensor.humidity()
Output humidity value: print("Humidity: {:.0f}%".format(humi))
Wait for 3 seconds and repeat the loop

GENERAL INFORMATION

Dear Customer

Thank you for choosing our product. In the following, we will show you what to consider during commissioning and use. If you encounter any unexpected problems during use, please feel free to contact us. The DHTll is a low-cost and straightforward digital temperature and humidity sensor that is particularly well suited for use with Raspberry Pi and Arduino.

BASIC INFORMATION

This sensor is a combination of temperature sensor and humidity sensor, united in a compact design. The sampling rate of the measurements is 2 seconds. This sensor is therefore particularly suitable for long-term measurements.

Technical Specifications

Chipset: DHT11
Communication protocol: 1-Wire
Measuring range temperature: 0 °C to 50 °C
Measurement accuracy: ±2°C
Humidity measuring range: 20-90 %RH
Measurement accuracy: ±50/oRH

USE WITH THE ARDUINO

Connection

ASSEMBLY AND INSTALLATION

Arduino/ DHT11

Pin D2: Signal
5v: +V
GND: GND

Code Example

We offer a code example for the use with the Arduino, which you can download here. This sensor does not output its measurement result as an analog signal to an output pin, but communicates it digitally and coded. There are several possibilities to control this sensor module.

The DHT-sensor-library published by the company Adafruit under the MIT- license, has proven to be particularly accessible. You can add the library directly in the Arduino IDE. To do this, click on Sketch ➔ Include Library ➔ Manage Libraries …. There you can search for the DHT sensor library in the search bar and install it. To use the sensor you now only need to copy the following modified code into your Arduino IDE and upload it to your Arduino. Before you start the code, make sure that the correct board is selected under Tools ➔ Board: and the correct COM port is selected under Tools ➔ Port.

joy-it-DHT11-Temperature-And-Humidity-Sensor-fig-3

USE WITH THE RASPBERRY Pl

Connection

Raspberry Pi/ DHT11

GPIO 23 (Pin 16): Signal
+3,3 V (Pin 1): +V
GND (Pin 6): GND

Code example

We provide a code example for use with the Raspberry Pi which you can download here. This code example uses the Adafruit CircuitPython DHT library from Adafruit which is released under the MIT-License.

sudo apt-get update
sudo apt-get install build-essential python-dev
sudo apt install gpiod
sudo apt install python3-pip
sudo pip3 install adafruit-circuitpython-dht

After you have executed the commands, you can also alternatively, if you have not downloaded the code sample, copy the following identical code sample into a newly created file. To do this, you must enter the following command into the console on your Raspberry Pi.

nano DHT11.py

Once you have done this, all you need to do is paste the following code into the file you have just created.

joy-it-DHT11-Temperature-And-Humidity-Sensor-fig-5

You can save the file with CTRL+O and then close it with CTRL+X.

python3 DHT11.py

USAGE WITH MICRO:BIT

Connection

Micro:Bit: DHT11

Pin 1: Signal
+3,3 V: +V
GND: GND

Code example

joy-it-DHT11-Temperature-And-Humidity-Sensor-fig-7

For the following code example an additional library is needed. To install it, click on “Add extension” in your make code sketch and search for “DHTll” here. Install here the ,,DHTll DHT22″ library by alankrantas. Transfer the following sample code into your sketch, or import the .hex-file.

USAGE WITH RASPBERRY Pl PICO

Connection

Raspberry Pi Pico: DHT11

GPI014: Signal
+3,3V: +V
GND: GND

Code example

For the following code example an additional library is needed: micropython- stubs by Jos Verlinde I published under the MIT license. Download the code sample here or transfer the following code completely to your Raspberry Pi Pico.

joy-it-DHT11-Temperature-And-Humidity-Sensor-fig-9

ADDITIONAL INFORMATION

Our information and take-back obligations according to the Electrical and Electronic Equipment Act (ElektroG)

Symbol on electrical and electronic equipment

This crossed-out dustbin means that electrical and electronic appliances do not belong in the household waste. You must return the old appliances to a collection point. Before handing over waste batteries and accumulators that are not enclosed by waste equipment must be separated from it.

Return options

As an end user, you can return your old device (which essentially fulfills the same function as the new device purchased from us) free of charge for disposal when you purchase a new device. Small appliances with no external dimensions greater than 25 cm can be disposed of in normal household quantities independently of the purchase of a new appliance.

Possibility of return at our company location during opening hours

SIMAC Electronics GmbH, Pascalstr. 8, D-47506 Neukirchen-Vluyn, Germany

Possibility of return in your area

We will send you a parcel stamp with which you can return the device to us free of charge. Please contact us by email at Service@joy-it.net or by telephone.

Information on packaging

If you do not have suitable packaging material or do not wish to use your own, please contact us and we will send you suitable packaging.

SUPPORT

If there are still any issues pending or problems arising after your purchase, we will support you by e-mail, telephone and with our ticket support system.