# Custom Shield - Indoor Air Quality Monitor

**URL:** <https://community.particle.io/t/custom-shield-indoor-air-quality-monitor/121>\
**Category:** Hardware\
**Created:** [June 21, 2013, 5:33am UTC](https://community.particle.io/t/custom-shield-indoor-air-quality-monitor/121 "2013-06-21T05:33:50Z")\
**Posts on this page:** 1\
**Showing post:** 113

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**Author:** ![mtnscott](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/mtnscott/32/3217_2.png) [@mtnscott](https://community.particle.io/u/mtnscott)\
**Post date:** [October 17, 2014, 11:43pm UTC](https://community.particle.io/t/custom-shield-indoor-air-quality-monitor/121/113 "2014-10-17T23:43:02Z")

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@rockvole, I recommend using a 1K pullup resistor on the data line for the DHT22.

> **[\[Submission\] Updated Non-blocking Interrupt Driven DHT Sensor Library](https://community.particle.io/t/updated-non-blocking-interrupt-driven-dht-sensor-library/7469)**
>
> I have published an updated version of the DHT interrupt driven sensor library. It now supports DHT22 and DHT11 sensors. It has been published it as PietteTech\_DHT in the libraries. The source is located at my github...

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