add embedded tooling

Author: brittonr

inventory/core/roster.nix

@@ -30,6 +30,7 @@ let
         "input"
         "kvm"
         "docker"
+        "dialout"
       ];
       sshAuthorizedKeys = [
         "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILYzh3yIsSTOYXkJMFHBKzkakoDfonm3/RED5rqMqhIO britton@framework"

inventory/home-profiles/brittonr/dev/embedded.nix

@@ -10,5 +10,23 @@
     # USB debugging and flashing tools
     usbutils # provides lsusb
     dfu-util # for DFU mode flashing
+
+    # Serial communication tools
+    screen # for serial terminal
+    minicom # alternative serial terminal
+    picocom # lightweight serial terminal
+
+    # Additional debug probe support
+    openocd # open on-chip debugger
+
+    # Logic analyzer and protocol analysis
+    sigrok-cli # command line logic analyzer
+    pulseview # GUI logic analyzer and oscilloscope
+
+    # Oscilloscope software
+    openhantek6022 # USB oscilloscope software
+
+    # PCB design tools
+    kicad # electronic design automation suite
   ];
 }

inventory/tags/udev-rules.nix

@@ -28,6 +28,7 @@ _: {
     ATTRS{idVendor}=="0483", ATTRS{idProduct}=="df11", MODE="0666", GROUP="plugdev", TAG+="uaccess"
   '';
 
-  # Ensure plugdev group exists
+  # Ensure groups exist and add users to dialout for serial access
   users.groups.plugdev = { };
+  users.groups.dialout = { };
 }