https://forum.elecrow.com/index.php?p=/ Mon, 13 Apr 2026 11:08:01 +0000 en rs485 — ELECROW - FORUM https://forum.elecrow.com/index.php?p=/discussion/26099/crowpanel-cm4 Mon, 21 Jul 2025 08:35:43 +0000 Raspberry Pi & CrowPi mceccarellitnx 26099@/index.php?p=/discussions I'm trying to get my crowpanel-cm4 to communicate with an industrial peripheral via RS-485, but I can't.
I created the cable according to the specifications given to me by the peripheral manufacturer. I'm wondering if I connected it to the correct pins on the crowpanel (I've attached a photo).
I've read in other threads that I need to open the /dev/ttyAMA2 port, but I can't read anything from it. I've also tried the other ports, AMA0, AMA1, and /dev/ttyS0, but nothing.
Is there a tool to check which port I need to open?
Do I need to activate something other than raspi-config (where I need to disable the serial console and enable RS-485, which I've already done)?
Thanks.

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