inconsistent Read and Write Issues with Multiple RCC522-RFID Modules

[swapnilsdeore]

I am experiencing inconsistent read and write issues when using multiple RCC522-RFID modules. The setup includes eight RCC522-RFID modules, all connected with a common MOSI, MISO, and SCLK, but each having its own unique chip select line.

Problem Description

1. Modules Used: Eight RCC522-RFID modules
2. Tags Used: NTAG 213

Connections:

1. Common MOSI(GPIO-10), MISO(GPIO-9), and SCLK (GPIO-11) lines on raspberry pi connected to each RC522-RFID modules.
2. Individual chip select lines for each RCC522 module

Read Failures: Intermittent failures when attempting to read data from NTAG 213 tags.
Write Failures: Inconsistent write operations, where some data writes are not successful or result in corrupted data
Additional Information: Scoped MOSI, MISO, SCLK, and CS lines; there is no crosstalk between lines.

Seeking guidance on how to resolve these read and write consistency issues, particularly in environments with multiple RCC522-RFID modules sharing common communication lines. Any insights or suggestions for troubleshooting and resolving these issues would be greatly appreciated.

[swapnilsdeore]

@mxgxw Kindly guide on this issue.