diff --git a/setup.sh b/setup.sh
index 5f2fcac..e0d7e99 100755
--- a/setup.sh
+++ b/setup.sh
@@ -1,22 +1,34 @@
 #!/bin/bash
 
+# commented commands were not necessary for 1st setup, but necessary for future updates/upgrades
 #arduino-cli update
-
 #arduino-cli upgrade
 
-#arduino-cli core install esp32:esp32
-
 # arduino-cli core update-index --additional-urls https://dl.espressif.com/dl/package_esp32_index.json
 arduino-cli core update-index --config-file arduino-cli.yaml
 
+# install core (board / platform)
 arduino-cli core install esp32:esp32
 
+# show the list of installed platforms
 arduino-cli core list
 
+# install library 
 arduino-cli lib install M5StickCPlus
 
-#arduino-cli core update-index
+# Optional for IRsend samples
+arduino-cli lib install IRremoteESP8266
+arduino-cli lib install WiFi HttpClient
+arduino-cli lib install Regexp Dictionary
+arduino-cli lib install ArduinoJson
+#arduino-cli lib install WiFiMulti_Generic
 
+
+## You can find other libraries as follows.
+# arduino-cli lib search [keyword]
+## if you get too much candidates, use grep to filter 
+# arduino-cli lib search [keyword] | grep -e "^Name"
+
+
+# Finally, just show board list
 arduino-cli board list
-
-#arduino-cli upload -p /dev/cu.usbserial-3D529862AB --fqbn esp32:esp32:m5stick-c spiffs_playsound.ino