DHT11 basic temperature-humidity sensor + extras

The DHT11 is an ultra - low - cost basic digital sensor for measuring temperature and humidity. It uses a capacitive humidity sensor and a thermistor to sense the surrounding air, sending out a digital signal on the data pin, so no analog input pins are needed. It's quite easy to use, but you need to be careful with timing when getting data. The main drawback is that you can only get new data every 2 seconds, which means sensor readings might be up to 2 seconds old when using our library. Compared to the DHT22, it's less precise and accurate, works in a smaller temperature/humidity range, yet it's smaller and cheaper. We have an Adafruit Learning System guide with schematics, Arduino & CircuitPython code, datasheets and more. It comes with a 4.7K or 10K resistor for pulling up the data pin to VCC.

Using the DHT11 sensor is straightforward. First, connect it to your device. You'll use the 4.7K or 10K resistor that comes with it to pull up the data pin to VCC. When it comes to getting data, just remember that it can only provide new information every 2 seconds. So, don't expect real - time readings all the time. Be careful with the timing when you try to grab data from it. As for maintenance, keep it in a normal environment. Avoid exposing it to extreme temperatures or high humidity for a long time, as this might affect its performance. If you want more technical details, check out our Adafruit Learning System guide.