# RFID Qwiic Reader - I2C problem

**URL:** <https://community.sparkfun.com/t/rfid-qwiic-reader-i2c-problem/41370>\
**Category:** NFC & RFID\
**Created:** [January 22, 2021, 2:05pm UTC](https://community.sparkfun.com/t/rfid-qwiic-reader-i2c-problem/41370 "2021-01-22T14:05:44Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![dragon](https://avatars.discourse-cdn.com/v4/letter/d/13edae/32.png) [@dragon](https://community.sparkfun.com/u/dragon)\
**Post date:** [January 22, 2021, 2:05pm UTC](https://community.sparkfun.com/t/rfid-qwiic-reader-i2c-problem/41370/1 "2021-01-22T14:05:44Z")

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Hi,

I have new RFID Qwiic Reader board, but i2cdetect is unable to find it. However, if there are any other sensors connected to RPI (via reader board qwiic), they are immediately visible. Am i missing something or it is broken board?

-RPI4 with qwiic hat

-Raspberry Pi os lite

-i2c is enabled

Thanks.

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**Author:** ![TS-Chris](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-chris/32/6057_2.png) [@TS-Chris](https://community.sparkfun.com/u/TS-Chris)\
**Post date:** [January 22, 2021, 4:22pm UTC](https://community.sparkfun.com/t/rfid-qwiic-reader-i2c-problem/41370/2 "2021-01-22T16:22:22Z")

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Hi dragon.

Is the Qwiic Reader visible when it and your other Qwiic devices are plugged in, or is it just never visible no matter what else is connected?

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**Author:** ![dragon](https://avatars.discourse-cdn.com/v4/letter/d/13edae/32.png) [@dragon](https://community.sparkfun.com/u/dragon)\
**Post date:** [January 22, 2021, 4:26pm UTC](https://community.sparkfun.com/t/rfid-qwiic-reader-i2c-problem/41370/3 "2021-01-22T16:26:51Z")

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The reader is not visible at all, no matter what else is connected. Just other divices are visible.

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<div class="post-metadata">

**Author:** ![TS-Chris](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-chris/32/6057_2.png) [@TS-Chris](https://community.sparkfun.com/u/TS-Chris)\
**Post date:** [January 22, 2021, 4:37pm UTC](https://community.sparkfun.com/t/rfid-qwiic-reader-i2c-problem/41370/4 "2021-01-22T16:37:24Z")

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OK, it sounds like the firmware is corrupt.

If you purchased the board directly off our website, just [[fill in the form on this page](https://www.sparkfun.com/returns) with your order number and the URL to this forum post and we can replace it for you.

If you purchased from a distributor or Amazon you will need to let them know you have a defective product and arrange with them for an exchange.]([Return Policy - SparkFun Electronics](https://www.sparkfun.com/returns))

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**Author:** ![benghurk](https://avatars.discourse-cdn.com/v4/letter/b/97f17d/32.png) [@benghurk](https://community.sparkfun.com/u/benghurk)\
**Post date:** [March 8, 2021, 5:54pm UTC](https://community.sparkfun.com/t/rfid-qwiic-reader-i2c-problem/41370/5 "2021-03-08T17:54:35Z")

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I’ve got an identical issue. I will fill out the same form, but it sounds like you might have gotten a bad batch of chips.