# Problem with multiple SPI devices on Arduino NANO and slave select not working properly

**URL:** <https://forum.arduino.cc/t/problem-with-multiple-spi-devices-on-arduino-nano-and-slave-select-not-working-properly/1073372>\
**Category:** Networking, Protocols, and Devices\
**Created:** [January 5, 2023, 2:50am UTC](https://forum.arduino.cc/t/problem-with-multiple-spi-devices-on-arduino-nano-and-slave-select-not-working-properly/1073372 "2023-01-05T02:50:12Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![david\_2018](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/david_2018/32/1013044_2.png) [@david\_2018](https://forum.arduino.cc/u/david_2018)\
**Post date:** [January 5, 2023, 11:28am UTC](https://forum.arduino.cc/t/problem-with-multiple-spi-devices-on-arduino-nano-and-slave-select-not-working-properly/1073372/5 "2023-01-05T11:28:40Z")

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Can you post a link to the SD card adapter? There is a fairly common design that has an error where the MISO line is not properly released. See this discussion for a bit more detail [https://forum.arduino.cc/t/spi-sd-card-reader-other-spi-device-not-working-together/447006](https://forum.arduino.cc/t/spi-sd-card-reader-other-spi-device-not-working-together/447006) there is a different modification that leaves the buffer in place but connects the enable pin for MISO to the CS line, unfortunately I can't locate the details for that at the moment.

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