Update readme

diff --git a/keyboards/lets_split/readme.md b/keyboards/lets_split/readme.md
index 6e296737a23c350f44a94857248ecf32c5493ecb..a63ce5907036d9234b7f5f260f9bd156f8bf4e55 100644 (file)
--- a/keyboards/lets_split/readme.md
+++ b/keyboards/lets_split/readme.md
@@ -74,6 +74,10 @@ not be very difficult to adapt it to support more if required.
 Flashing
 --------
 
+From the keymap directory run `make SUBPROJECT-KEYMAP-avrdude` for automatic serial port resolution and flashing.
+
+Example: `make rev2-serial-avrdude`
+
 If you define `EE_HANDS` in your `config.h`, you will need to set the
 EEPROM for the left and right halves. The EEPROM is used to store whether the
 half is left handed or right handed. This makes it so that the same firmware