# Q：How to connect IDT-E2RH?

**URL:** <https://community.inkbird.com/t/q-how-to-connect-idt-e2rh/66>\
**Category:** Questions & Answers\
**Tags:** smart-controller\
**Created:** [October 12, 2021, 10:29am UTC](https://community.inkbird.com/t/q-how-to-connect-idt-e2rh/66 "2021-10-12T10:29:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![INKBIRD](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.inkbird.com/inkbird/32/366_2.png) [@INKBIRD](https://community.inkbird.com/u/INKBIRD)\
**Post date:** [October 12, 2021, 10:29am UTC](https://community.inkbird.com/t/q-how-to-connect-idt-e2rh/66/1 "2021-10-12T10:29:50Z")

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A: Please refer to the figures below. Note: If you don’t have NPN or PNP, you can ignore them.  
 ![图片1](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/1X/ac9ea175921bf941c570d0022616b684f71a894f.png)  
 ![图片2](https://canada1.discourse-cdn.com/flex031/uploads/inkbird1/original/1X/9ef00160fe3d958738e874661d5480b0ae64d2d5.png)