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This article claims the the DHT22, a slightly upgraded version of the DHT11, is able to handle wires of up to 30M when powered with 5V. I don't think power is the issue, as much as the ability of the signal line to carry the signal over that length of wire. Just use a 5V Arduino board and you should be ok. (It looks like each one only needs about 1.5 mA, so ...


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DHT11 sensor uses a "single-Wire" protocol with open drain IOs. so it's fine for cable to be long. use a lower value Pull-up resistor for Data line of DHT11. the datasheet says a 5K pull-up resistor is enough for up to 20m wire length. the process of reading a sensor can't be paralleled. you have to read them one at a time, store them on a local variable and ...


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This forum isn't great for detailed solutions to vague problems. If you don't have much experience with programming, you'll have a lot to figure out. It will take you a while (realistically probably a couple of weeks if you work at it every day, and have a knack for it, assuming you're starting from scratch.) The first step is to define your problem. It ...


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Fixed it by clicking the red button on the arduino uno.


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The 9v sort of "cube shaped" batteries have a notoriously limited current output, resulting in falling voltage as the current demand rises. The Arduino's voltage regulator is not very effecient either, plus the battery gives only 2v of "headroom" over the minimum Vin voltage of 7v. Your system is probably starving. Try a different source.


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Your case : Check wire (shors ?) and pin configuration (out ??) General : No resistor in a ground path. Decoupling supply : one can insert a 100 Ohms resistor between the arduino +5V and the +5V sensor : but ALWAYS use a decoupling capacitor : connect a 100µF betwen +5V sensor and groud. One can add a 100nF ceramic in paraller for digital devices. ...


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