diff --git a/docs/Installation.md b/docs/Installation.md
index 57d94cb8..2c3644d4 100644
--- a/docs/Installation.md
+++ b/docs/Installation.md
@@ -56,19 +56,41 @@ provided. Once configured, run:
 make
 ```
 
-Finally, for common micro-controllers, the code can be flashed with:
+It is necessary to determine the serial port connected to the
+micro-controller. For micro-controllers that connect via USB, run the
+following:
+
+```
+ls /dev/serial/by-id/*
+```
+
+It should report something similar to the following:
+
+```
+/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0
+```
+
+It's common for each printer to have its own unique serial port name.
+This unique name will be used when flashing the micro-controller. It's
+possible there may be multiple lines in the above output - if so,
+choose the line corresponding to the micro-controller (see the
+[FAQ](FAQ.md#wheres-my-serial-port) for more information).
+
+For common micro-controllers, the code can be flashed with something
+similar to:
 
 ```
 sudo service klipper stop
-make flash FLASH_DEVICE=/dev/ttyACM0
+make flash FLASH_DEVICE=/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0
 sudo service klipper start
 ```
 
+Be sure to update the FLASH_DEVICE with the printer's unique serial
+port name.
+
 When flashing for the first time, make sure that OctoPrint is not
 connected directly to the printer (from the OctoPrint web page, under
-the "Connection" section, click "Disconnect"). The most common
-communication device is **/dev/ttyACM0** - see the
-[FAQ](FAQ.md#wheres-my-serial-port) for other possibilities.
+the "Connection" section, click "Disconnect").
 
 Configuring OctoPrint to use Klipper
 ====================================
@@ -127,6 +149,17 @@ nano ~/printer.cfg
 Make sure to review and update each setting that is appropriate for
 the hardware.
 
+It's common for each printer to have its own unique name for the
+micro-controller. The name may change after flashing Klipper, so rerun
+the `ls /dev/serial/by-id/*` command and then update the config file
+with the unique name. For example, update the `[mcu]` section to look
+something similar to:
+
+```
+[mcu]
+serial: /dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0
+```
+
 After creating and editing the file it will be necessary to issue a
 "restart" command in the OctoPrint web terminal to load the config. A
 "status" command will report the printer is ready if the Klipper