explain lcd wiring

Author: isbkch

README.md

@@ -36,18 +36,25 @@ Humidity is the water vapor around you mixed with air. It is measured in %. So,
 
 (2) The air in a desert does contain some water but it is a very little amount compared to a normal place. The Sahara Desert has a mean humidity of 25%.</p>
 
+<img align="right" src="https://github.com/MecaHumArduino/arduino-uno-aws-weather-station/blob/master/docs/dht11.jpeg?raw=true" style="max-width:100%;" height="350">
 
 How to measure Temperature & Humidity
 -------------------------------------
 
-<img align="center" src="https://github.com/MecaHumArduino/arduino-uno-aws-weather-station/blob/master/docs/dht11.jpeg?raw=true">
+To the right, is a [DHT11](https://amzn.to/2Qs9fcV) sensor, it is a temperature and humidity combined sensor with calibrated digital signal output. It's is a reliable sensor for determining temperature and humidity. There is a newer and more accurate module on the market called DHT22 but we will stick with the DHT11 for this demo
 
-This is a [DHT11](https://amzn.to/2Qs9fcV) sensor, it is a temperature and humidity combined sensor with calibrated digital signal output. It's is a reliable sensor for determining temperature and humidity. There is a newer and more accurate module on the market called DHT22 but we will stick with the DHT11 for this demo
+DHT11 - Schematic Diagram
+-------------------------
 
-Schematic Diagram
------------------
+Wire the [DHT11](https://amzn.to/2Qs9fcV) sensor to the [Arduino Uno](https://amzn.to/2RnHhPY) development board as shown in the following schematic diagram.
+
+<img align="center" src="https://github.com/MecaHumArduino/arduino-uno-aws-weather-station/blob/master/docs/dht11-wiring.png?raw=true" style="max-width:100%;" height="600">
+
+LCD Screen - Schematic Diagram
+------------------------------
 
-Wire the [DHT11](https://amzn.to/2Qs9fcV) or [DHT22](https://amzn.to/31t7P8l) sensor to the [Arduino Uno](https://amzn.to/2RnHhPY) development board as shown in the following schematic diagram.
+The LCD display needs six Arduino pins, all set to be digital outputs. It also needs 5V and GND connections.
 
-<img align="center" src="https://github.com/isbkch/esp32-aws-weather-station/blob/master/docs/schematic.png?raw=true" style="max-width:100%;" height="600">
+There are a number of connections to be made. Lining up the display with the top of the breadboard helps to identify its pins without too much counting, especially if the breadboard has its rows numbered with row 1 as the top row of the board. Do not forget, the long yellow lead that links the slider of the pot to pin 3 of the display. The potentiometer is used to control the contrast of the display.
 
+<img align="center" src="https://github.com/MecaHumArduino/arduino-uno-aws-weather-station/blob/master/docs/lcd-schema.png?raw=true" style="max-width:100%;" height="600">