diff --git a/99-rylr998.rules b/99-rylr998.rules
new file mode 100644
index 0000000..2f42066
--- /dev/null
+++ b/99-rylr998.rules
@@ -0,0 +1,6 @@
+# RYLR998 LoRa modules — stable symlinks by EUI
+# Install: sudo cp 99-rylr998.rules /usr/lib/udev/rules.d/
+# Reload:  sudo udevadm control --reload-rules && sudo udevadm trigger
+
+SUBSYSTEM=="tty", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", ATTRS{product}=="RYLR998*1130", SYMLINK+="rylr998-1130"
+SUBSYSTEM=="tty", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", ATTRS{product}=="RYLR998*0D27", SYMLINK+="rylr998-0D27"