diff --git a/justfile b/justfile
index e8454c8..79ca0f9 100644
--- a/justfile
+++ b/justfile
@@ -368,22 +368,8 @@ midi-log:
 
 # Reset MCU via router RPC and reopen serial
 reset-mcu:
-    @ssh {{SSH_OPTS}} "{{BOARD_USER}}@{{BOARD_HOST}}" "\
-        python3 -c '
-import socket, msgpack, time
-s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-s.settimeout(5)
-s.connect(\"/var/run/arduino-router.sock\")
-p = msgpack.Packer()
-req = p.pack([0, 1, \"mon/reset\", []])
-s.sendall(req); s.recv(4096)
-req = p.pack([0, 2, \"\$/serial/close\", [\"/dev/ttyHS1\"]])
-s.sendall(req); s.recv(4096)
-req = p.pack([0, 3, \"\$/serial/open\", [\"/dev/ttyHS1\"]])
-s.sendall(req); s.recv(4096)
-s.close()
-print(\"MCU reset, serial reopened. Wait 20s for Bridge.begin()...\")
-'"
+    @scp {{SSH_OPTS}} scripts/reset-mcu.py "{{BOARD_USER}}@{{BOARD_HOST}}:{{REPO_DIR}}/scripts/reset-mcu.py"
+    @ssh {{SSH_OPTS}} "{{BOARD_USER}}@{{BOARD_HOST}}" "python3 {{REPO_DIR}}/scripts/reset-mcu.py"
 
 # Check viz stats live
 viz-stats:
diff --git a/scripts/reset-mcu.py b/scripts/reset-mcu.py
new file mode 100644
index 0000000..966cfc4
--- /dev/null
+++ b/scripts/reset-mcu.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+import socket, msgpack, time, sys
+
+ROUTER_SOCK = sys.argv[1] if len(sys.argv) > 1 else "/var/run/arduino-router.sock"
+SERIAL_DEV = sys.argv[2] if len(sys.argv) > 2 else "/dev/ttyHS1"
+
+s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+s.settimeout(5)
+s.connect(ROUTER_SOCK)
+p = msgpack.Packer()
+
+req = p.pack([0, 1, "mon/reset", []])
+s.sendall(req); s.recv(4096)
+
+req = p.pack([0, 2, "$/serial/close", [SERIAL_DEV]])
+s.sendall(req); s.recv(4096)
+
+req = p.pack([0, 3, "$/serial/open", [SERIAL_DEV]])
+s.sendall(req); s.recv(4096)
+
+s.close()
+print("MCU reset, serial reopened. Wait 20s for Bridge.begin()...")