Maximum of connected Grove NFC readers

Grove is a modulated, ready-to-use tool set.
Much like Lego, it takes a building block approach to assembling electronics.

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r.leegwater
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Maximum of connected Grove NFC readers

Post by r.leegwater » Mon Sep 10, 2018 10:47 pm

Hi

Can I connect 9 or 12 Grove NFC readers to one Arduino?
I am building a game setup where the player should scan his NFC chip on different locations in a limited timeframe.

Can't find any info on this...
Thanks for the help in advance.

seeed techsupport team
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Re: Maximum of connected Grove NFC readers

Post by seeed techsupport team » Tue Sep 11, 2018 9:17 am

Hi there,

there are 2 communication ways. One is I2C and the other is UART. We suggest I2C, You have a 7-bit address. That means you can address up to 127 slaves. The number of devices connected to the bus is only limited by the total allowed bus capacitance of 400 pF. So the number will be less than 127. but it do supports 9 or 12. for more info, please refer to https://www.bluedot.space/tutorials/how ... n-i2c-bus/. thanks.

Bill

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