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Connecting RFID via I2C #240

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lifebearups opened this issue Sep 6, 2016 · 3 comments
Closed

Connecting RFID via I2C #240

lifebearups opened this issue Sep 6, 2016 · 3 comments
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enhancement 🚀 a wish or proposal for future features question ❓

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@lifebearups
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Hi, I was browsing the MFRC522 datasheet (http://www.nxp.com/documents/data_sheet/MFRC522.pdf) and I saw that it has I2C support. I couldn't find any implementation of it online, or anyone that has performed that.

Is it possible to communicate with this component via I2c?

@tuyethoa08041997
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tuyethoa08041997 commented Sep 7, 2016

I never see any implementation before, maybe because I2C's speed is slow...

@piebat
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piebat commented Sep 7, 2016

the most popular board on internet (and the cheapest) is set for SPI only. I found another with i2c (PCB board was red color), but it was more expansive. In this moment I don't have a link, but you can search on internet. The chip can use UART, SPI or i2c, but the board that I found are not configurable, so generally them are made for one only of the protocol. So I think that if you don't find is because the board are hard to find.

@Rotzbua Rotzbua added enhancement 🚀 a wish or proposal for future features question ❓ labels Sep 8, 2016
@Lukelectro Lukelectro mentioned this issue Jun 10, 2018
@girlpunk
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girlpunk commented Feb 5, 2022

Not sure if you're still looking for a cheaper device to use for adding I2C support, but there are now ones available for around $5

https://shop.m5stack.com/products/rfid-unit-2-ws1850s

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