diff --git a/readme.md b/readme.md
new file mode 100644
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--- /dev/null
+++ b/readme.md
@@ -0,0 +1,4 @@
+export ARDUINO_SKETCHBOOK_DIR=~/rgbled
+arduino-cli compile --debug --fqbn=esp8266:esp8266:nodemcu ~/rgbled/sketch
+
+