PiCam Module - UART Serial access - PiCam https://forum.taskit.de/picam/picam-module-uart-serial-access taskit Forum Diskussions Board de Tue, 14 Apr 2026 13:30:56 +0000 wpForo 60 RE: PiCam Module - UART Serial access https://forum.taskit.de/picam/picam-module-uart-serial-access#post-42 Thu, 13 Oct 2022 09:04:39 +0000 Dear customer,

no you can´t use the EEPROM pins to access the GPIO pins. The EEPROM pins are EEPROM_nWP Pin1 and Ground Pin2.
From the cm4io-datasheet: "EEPROM_nWP If fitted write protects the EEPROM on the CM4".

https://datasheets.raspberrypi.com/cm4i ... asheet.pdf

None of the Uart Serial Pins from the cpu are connected to the board so USB ist the only option you have.

]]> PiCam mpurrmann https://forum.taskit.de/picam/picam-module-uart-serial-access#post-42 PiCam Module - UART Serial access https://forum.taskit.de/picam/picam-module-uart-serial-access#post-41 Thu, 13 Oct 2022 09:03:39 +0000 Hello taskit-team

,
Can I use the EEPROM pins on the PiCam Module Board to access the Uart Serial pins on the CM4 (GPIO 14 TXD & 15 RXD on the standared Pi)?

If not is there any other way to access the CM4's Uart Serial via this board? Or is USB the only option?

Thanks in advance!

]]> PiCam mpurrmann https://forum.taskit.de/picam/picam-module-uart-serial-access#post-41