Buy the SHT31-D. No problem using it on both Arduino Uno and Rasp P13B+ Super easy and very accurate. }, Arduino: 1.6.8 (Windows 7), Board: “Arduino/Genuino Uno”, C:\Users\dillu\Documents\Arduino\my\my.ino:1:17: fatal error: dht.h: No such file or directory. Project showcase by Rick_Findus. I love this so much!! lcd.clear(); //Clears any previous message on LCD int chk = DHT.read11(DHT11_PIN); Arduino: 1.6.6 (Windows 10), Board: “Arduino/Genuino Uno”, WARNING: Spurious .github folder in ‘DHT sensor library’ library Hello, I built my first arduino project (measuring the room temperature and humidity with the DHT11) during Christmas holidays. Thanks. even after 5 minutes the readings show 999. why? why do you need the pull-up resistor? In module form, the order of the module's pins can vary between manufacturers. They are similar to each other. Is it possible to connect line 3 with dht11? avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xb1 Error compiling for board WeMos D1(Retired). avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xb1 pls im begging you guys help me with this one :(. Can anyone help me? Serial.print(“Temperature = “); //(0,1) indicates (Character position from left, Row 0=1 1=2) /Resources/Java/libraries/DHTLib/dht.cpp:114: error: ‘digitalPinToBitMask’ was not declared in this scope Now you have a portable temperature and humidity sensor with a real time display. Once hardware connections are done, you need to add DHT22 library to your Arduino library file as described earlier. That may be causing your issue. I’d definitely donate to this superb blog! I guess for now i’ll settle for bookmarking and adding your RSS feed Maximum is 32256 bytes. let me konw if i understand it correctly: The diagram is correct, but your particular DHT11 could have a different pinout depending on the manufacturer. Humidity = 60.00 Temperature = 0.00 The pins should be labelled with S for signal and “-” or “GND” ground. You have to upload the library through Sketch tab. Do you know how to average the readings from DHT11 using Ardunio Uno? Can someone help me to burn a light if the DHT11 detect something? Temperature = -999.00 Required fields are marked *. Try using the library in the zip file from the post (version 0.1.14). May I ask why is there a decimal point but the numbers after it are always .00? Temperature = -999.00 I also need to know how to change from celsius to farehneit. Sorry about that… Thanks for the input! Temperature = 25.00 LiquidCrystal_I2C lcd(0x27,16,2); Temperature= -999.00 I think the library doesn’t support the board. I have been playing with the code, rechecking pins, etc, but I cant seem to pinpoint the problem. It is discussed on the net you get different measurement results from DHT11. I was wondering whether this humidity sensor could be used to simply close the 5v circuit so teh fan runs on until teh humidity is below a set vaue. #include, void loop() This report would have more information with in every other arduino program I can find that uses additional libraries, the library is called first, then the code goes straight on to initialising the variables and describing the setup. You can put the microcontroller in sleep mod and set it to wake up after ex 60 sec. Household humidity drops in the winter as your furnace runs. }. I’m curious, how does the accuracy of this setup compare to a home weather station from a manufacturer like the ones shown at Serial.println(DHT.temperature); Where should I add a float line to get the temp and humidity to read out to 2 decimal places? You would just duplicate the code and use a separate pin to read the data for each sensor, Hi. As many has commented here: If I connects ONLY DTH11 to Arduino with serial monitor it works fine, BUT if I connect it to LCD as described above it shows -999.00 In both LCD and serial monitor. Save my name, email, and website in this browser for the next time I comment. Turn Any Appliance into a Smart Device with an Arduino Controlled Power Outlet,,,,,,,


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