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Adafruit data logging shield
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Adafruit data logging shield

by mkovacs on Tue Oct 26, 2021 2:08 pm

Can I use two or more data logging shields with my Adafruit METRO? I have wired the headers to accept stacks.

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Re: Adafruit data logging shield

by adafruit_support_carter on Thu Oct 28, 2021 11:39 am

You can, but it will take a little work. The SD card uses SPI, which has shared pins SCK/MOSI/MISO for connected devices (like each SD card). However, each device needs its own chip select (CS) pin. So for one shield, you'll need to cut the CS trace and solder in a jumper wire to a new/different pin to avoid a CS pin conflict between the two shield. And then set the CS pin in code for the second shield.

shield_cs.jpg
shield_cs.jpg (76.9 KiB) Viewed 233 times

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