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Update README.md

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Vitor de Miranda Henrique
2018-01-02 09:48:05 -06:00
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@@ -23,7 +23,7 @@ To control the encosure temperature or get temperature trigged events, you need
Wire the sensor following the wiring diagram on the pictures on thingiverse, you can use any GPIO pin.
For DHT11 and DHT22 sensors, don't forget to connect a 4.7K - 10K resistor from the data pin to VCC
For DHT11 and DHT22 sensors, don't forget to connect a 4.7K - 10K resistor from the data pin to VCC. Also, be aware that DHT sensors some times can not work reliably on linux, this is a limitation of reading DHT sensors from Linux--there's no guarantee the program will be given enough priority and time by the Linux kernel to reliably read the sensor. Another common issue is the power supply. you need a constant and good 3.3V, sometimes a underpowered raspberry pi will not have a solid 3.3V power supply, so you could try powering the sensor with 5V and using a level shifter on the read pin.
You need to install Adafruit library to use the temperature sensor on raspberry pi.