updated readme

README.md

@@ -1,3 +1,52 @@
 # pi_gpiozero_examples
 
 A collection of examples for using the gpiozero library for reading sensors and activating actuators
+
+
+# First steps
+
+Install python3-gpiozero
+
+`$ sudo apt update && sudo apt install python3-gpiozero`
+
+##analogSensor.py
+
+How to read analog values using a MCP3008 ADC (analog to digital converter)
+
+##distanceSensor.py
+
+Using HC-SRO4 distance sensor
+
+Hardware required: 
+	
+	* 330 & 470 ohm resistors
+	* HC-SRO4 Distance sensor
+
+##ldrLed.py
+
+Using an LDR to set the values of an LED, also smoothing and constraining sensor values in the process
+
+Hardware required:
+	* LDR
+	* LED
+	* 330 ohm resistor
+
+## servo.py
+
+Operate a servo
+
+## webLed.py
+
+Turn an LED on or off based on the input from a web page
+
+Requires `flask` (`$ sudo apt install python3-flask`)
+
+To change the look of the HTML page, have a look at the folder `template`
+
+## remoteGpioFromHome.py
+
+Interact with an LED using remote-gpio. 
+
+## remoteGpioFromPi.py
+
+Read buttons on different Pis in the VPN to trigger an LED