# RTL8720DN as I2C slave

**URL:** <https://forum.amebaiot.com/t/rtl8720dn-as-i2c-slave/407>\
**Category:** Peripherals\
**Tags:** evb-bw16, rtl872xd\
**Created:** [March 30, 2021, 8:00am UTC](https://forum.amebaiot.com/t/rtl8720dn-as-i2c-slave/407 "2021-03-30T08:00:04Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![xidameng](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.amebaiot.com/xidameng/32/18_2.png) [@xidameng](https://forum.amebaiot.com/u/xidameng)\
**Post date:** [March 30, 2021, 8:20am UTC](https://forum.amebaiot.com/t/rtl8720dn-as-i2c-slave/407/2 "2021-03-30T08:20:05Z")

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hi Tim,

afaik, arduino also only uses i2c in master mode

> [@TBeeren](#):
>
> but facing some weird issues where the polling mode doesn’t seem to work

do you mind elaborate?

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