# Wire library missing in Hardware I/0 for use dht22 in processing 3?

**URL:** <https://discourse.processing.org/t/wire-library-missing-in-hardware-i-0-for-use-dht22-in-processing-3/12436>\
**Category:** Processing for Pi\
**Created:** [July 2, 2019, 7:50pm UTC](https://discourse.processing.org/t/wire-library-missing-in-hardware-i-0-for-use-dht22-in-processing-3/12436 "2019-07-02T19:50:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Lucas68](https://avatars.discourse-cdn.com/v4/letter/l/8797f3/32.png) [@Lucas68](https://discourse.processing.org/u/Lucas68)\
**Post date:** [July 2, 2019, 7:50pm UTC](https://discourse.processing.org/t/wire-library-missing-in-hardware-i-0-for-use-dht22-in-processing-3/12436/1 "2019-07-02T19:50:00Z")

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hi, I need some help, I have to connect a dht22 sensor to the rasberry pi 3b + wire port, but in the i / O hardware libraries the wire is not managed by processing 3, someone has developed a separate library, I have a shortcut to communicate via os inside a sketch the reading of the device connected to the wire port of raspi, I know that in the shell it is feasible, I know that the libraries are for python that I cannot use because I started to develop an application of domotica totally in processing 3 with the support of the libraries controlp5, i2c and spi, if someone could help me I would be really grateful, thanks to all.