update DStarGateway post with Raspi 4 infos

content/posts/2024/62-a-slim-dstar-gateway-on-a-raspberry-pi-2/index.md

@@ -128,6 +128,10 @@ $ make
 
 This ran for 38 minutes -- I will not forget to run `make -j4` the next time :face_with_rolling_eyes:
 
+{{< alert "circle-info" >}}
+**Update**: This took <mark>3m 40s</mark> on my Raspberry Pi 4 2GB when run with `make -j4`.
+{{< /alert >}}
+
 You would now typically install the files but this is the part that made me stop for a while.
 
 ~~~console
@@ -136,6 +140,10 @@ $ sudo make install
 
 It will break, but at least it installs the binary files into `/usr/local/bin`. 
 
+{{< alert "circle-info" >}}
+**Update**: I did not have these problems on the Raspberry Pi 4 any more.
+{{< /alert >}}
+
 Whatever I was doing, it won't work automated. I'm not a developer, but to me this looks
 like as if `make -C` enters the directory before it runs the top-level Makefile so the
 `export ...` lines never get executed and the Makefiles in the sub-directories will never
@@ -157,6 +165,11 @@ $ sudo make newhostfiles
 
 Copy the systemd unit files to the right directory per hand:
 
+{{< alert "circle-info" >}}
+**Update**: Again, on the Pi 4 this was not needed. It looks like I messed something
+up on the Raspberry Pi 2. Yet I leave the hints, they may become useful hopefully.
+{{< /alert >}}
+
 ~~~console
 $ sudo cp debian/* /usr/lib/systemd/system/
 ~~~
@@ -232,6 +245,17 @@ Enable the UART in `/boot/config.txt`:
 enable_uart=1
 ~~~
 
+{{< alert "circle-info" >}}
+**Update**: On the Raspberry Pi 4 again, we would write something like
+
+~~~ini
+enable_uart=1
+dtoverlay=disable-bt
+~~~
+
+But we should not need to disable the serial console `serial-getty@ttyAMA0.service`.
+{{< /alert >}}
+
 Add this near the top or after `[All]`.
 
 We need to disable the serial console because we need the UART at the GPIO pins
@@ -243,8 +267,9 @@ Disable the serial console service:
 $ sudo systemctl disable serial-getty@ttyAMA0.service
 ~~~
 
-Open `/boot/cmdline.txt` and remove `console=serial0,115200` from the line. Save
-and reboot.
+Open `/boot/cmdline.txt` and remove `console=serial0,115200` from the line.
+
+Save and reboot.
 
 ## Configuration