installing micropython on esp32 in resources

sept4_reactive_light/README.md

@@ -18,6 +18,7 @@ Outputs:
 
 * Neopixels (light)
 * Mini speaker
+* GPIO
 
 Communications:
 
@@ -33,6 +34,7 @@ Sensors:
 * infra-red proximity
 * slide switch
 * 2 x push buttons
+* ADC
 
 Controller:
 
@@ -50,3 +52,10 @@ Power:
 The CPX provides a great introduction into planning and trying out systems, because it has a lot packed into it, with one exception. It is not good at communications/networking, as it has no buil-in radio or ethernet connection.
 
 In this scenario, it is most common to team up the controller with another device that does have communications capability, such as a single-board computer. The CPX can communicate by serial through the USB port, and the SBC can then handle networking and communications (as we did with our MQTT experiments the previous month.)
+
+Resources:
+
+CPX Guided Tour
+https://learn.adafruit.com/adafruit-circuit-playground-express/guided-tour
+
+