I have some question about RaspberryPi CM4 Wi-Fi module, 2 GB RAM, 32 GB Storage.

First, I am using Cm4 with Wi-Fi and without Wi-Fi Modules for some projects with special IO Board.

Second, the cm4 with Wi-Fi and without Wi-Fi modules are working with Raspberry IO Board well. But when the cm4 without wi-fi module connects to special IO Board, it works well again but with wi-fi module is not booting unfortunately. Note: I saw a message on boot screen; Failed to open device: 'sdcard' (cmd 61b0010 status 1fef0002)

Conclucion; Could you give me some advice about this issue? What is the difference of between cm4 with wifi and cm4 without wifi? Does the Cm4 with wifi module need more pin connection for booting?

Thank you for any help.

  • please use correct power supply. 5V 3A (eg. Raspberry official power supply.)
    – yottabyte
    Nov 7, 2022 at 15:31


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