Differences

This shows you the differences between two versions of the page.

--- raspberry-pi:ipfire-on-rpicm4 [2023/12/16 23:36] – [Open serial console with screen] Zyzonix
+++ raspberry-pi:ipfire-on-rpicm4 [2025/04/13 12:02] (current) – [Adjusting Interfaces (MAC Addresses) (important!)] Samsoneko
@@ Line 6: / Line 6: @@
 //Disclaimer: all provided links in this article **aren't** sponsored!//
-<callout type="info" icon="true">Tutorial tested against a Raspberry Pi Compute Module 4 (4GB, rev. 1.2) and IPFire Core Update 179. During the setup a second Raspberry Pi 4 with local attached keyboard and monitor was used. </callout>
+<callout type="info" icon="true">Tutorial tested against a Raspberry Pi Compute Module 4 (4GB, rev. 1.2) and IPFire Core Update 179. During the setup a second Raspberry Pi 3B+ with local attached keyboard and monitor was used. </callout>
 → IPFire's wiki can be found [[https://wiki.ipfire.org/|here]].
@@ Line 22: / Line 22: @@
   * //HDMI-Cable//
   * //Keyboard//
+  * //or USB2TTL Apdapter//
 ===== Download and flash the Image to the SD-Card =====
@@ Line 47: / Line 48: @@
 Now connect the following pins on your carrier board's GPIO and your second Pi's GPIO with three jumper wires (female to female):
 <WRAP 40%>
-^ Carrier Board (CM4)  ^ 2nd Raspberry Pi  ^ Use               ^
+^ Carrier Board (CM4)  ^ 2nd Raspberry Pi / USB2TTL  ^ Use               ^
-| **''6''**            | **''6''**         | Ground            |
+| **''6''**            | **''6''** / **''GND''**     | Ground (GND)      |
-| **''10''**           | **''8''**         | Receive and send  |
+| **''10''**           | **''8''** / **''TX''**      | Receive and send  |
-| **''8''**            | **''10''**        | Send and receive  |
+| **''8''**            | **''10''** / **''RX''**     | Send and receive  |
 </WRAP>
@@ Line 65: / Line 66: @@
 <callout type="warning" icon="true">
-When using a Raspberry Pi 4B also add the following lines to your ''config.txt'' to get a human-readable console:
+When using a Raspberry Pi with bluetooth as second device also add the following lines to your ''config.txt'':
 <code bash>
+# disable bluetooth via uart
 dtoverlay=pi3-disable-bt
 dtoverlay=pi3-miniuart-bt
+dtoverlay=disable-bt
+dtoverlay=miniuart-bt
 </code>
+This will disable the bluetooth module, because this may break your serial connection as it also uses the uart console.
+In general there might be issues with the serial connection, it's recommended to firstly open the serial console on the second Pi and then booting up the CM4. Additionally **do not** dis- and reconnect to a running console session, otherwise your console might not be readable anymore for this session.
 </callout>
-Then you can execute the follwing command from the second Pi to connect to your serial console. It doens't matter if you're using an attached keyboard and monitor or a SSH-connection.
+Then you can execute the follwing command from the second Pi to connect to your serial console. **It's strongly recommended to use a local attached keyboard and monitor on a Pi that boots to CLI(!) rather than creating the serial connection via SSH / Desktop.**
 <code bash>screen /dev/ttyS0 115200</code>
+(root-permission required!)
 → you might install ''screen'' befire by running the following command:
 <code bash>sudo apt install screen</code>
+If ''/dev/ttyS0'' doesn't work, use ''/dev/serial0''. In case you are using a USB2TTL-Card use ''/dev/ttyUSB0''.
 Finally perform the setup of IPFire as usual!
 With ''Ctrl+A'' and ''D'' you can quit the ''screen''-session.
+===== Select correct boot method =====
+When booting for the first time, there will be three entries in the grub bootloader.
+**Select the 3rd option, that contains ''serial console''!**
+===== Adjusting Interfaces (MAC Addresses) (important!) =====
+As described also in this [[https://community.ipfire.org/t/rpi-cm4-red-interface-not-available-after-reboot/7119/3|blog post]] in IPFire's official forum, there are assigment issues with the carrier board's NICs. It seems that the second PCIe NIC gets a self-assignet MAC everytime the device boots up. This is followed by the host OS no longer recognizing the NIC. To solve this issue there is a more or less fancy workaround here in this wiki: [[linux:linux-tutorials:set-persistent-mac-rtl8111|Set persistent MAC for RTL8111/8168/8411 (r8169) with udev]] (internal link).
+It's also recommended to completely shut down again and reboot to verify the changes!
+----
 //Resources used: [[https://www.cyberciti.biz/hardware/5-linux-unix-commands-for-connecting-to-the-serial-console/|cyberciti.biz - linux serial console]], [[https://scribles.net/setting-up-uart-serial-communication-between-raspberry-pis/|scribles.net - uart communitation between to Raspberry Pis]] and [[https://wiki.ipfire.org/hardware/arm/rpi/four#fn:1|wiki.ipfire.org - Raspberry Pi 4 Model B]]