For Arduino Workshops only. Not applicable for EG1311
Table of Contents
DS3232 Real-time Clock
- 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
- 16x2 display with blue backlight
- Contrast need to be adjust 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
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Sensor
- 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