For Arduino Workshops only. Not applicable for EG1311
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Libraries
Install the libraries from this file - RTC_LCD_DHT.zip
DS3232 Real-time Clock
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Maintains time even when Arduino is not powered
Used in computers to maintain time
Time can be set from the Arduino
Uses I2C protocol
4 connections
SDA (Serial Data) – Connect to SDA pin of Arduino (2 pins away from pin 13)
SCL (Serial Clock) – Connect to SCL pin of Arduino (3 pins away from pin 13)
VCC – 5V of Arduino
GND – GND of Arduino
You can use the SetSerial program to set the time
Send 2019,10,19,16,10,00 from serial monitor to set the time to 4:10pm on 19/10/2019
I2C 16×2 Character LCD Module
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16x2 display with backlight
Contrast needs to be adjusted using a screw-driver
Uses I2C protocol
4 connections
SDA – SDA pin of Arduino
SCL – SCL pin of Arduino
VCC – 5V of Arduino
GND – GND of Arduino
Some modules may use a different address – use the I2Scanner program can find out
Can be connected in parallel to the DS3232 RTC and be operated simultaneously (the two are distinguished by their addresses)
DHT 11 Humidity Sensor
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Gives temperature and humidity readings
Uses a custom (non-standard) protocol
Data can be up to 2 seconds old
3 connections
DATA – Serial Data. Connect to any digital pin of Arduino
The supplied program is meant to use pin 12
Change #define DHTPIN <pin_number> if using any other pin
VCC – 5V of Arduino
GND – GND of Arduino