Master Slave

Control several devices through I2C.

Upload code to slaves with slave.ino. Make sure to change the address (SLAVE_ADDRESS). The slave will read values from 2 sensors: Temperature, humidity, voltage and send them to master every second.

To upload code to master, there are 2 options:

• Without timestamp: Use the MasterWithoutTimestamp.ino file to upload to master. DS3231 can be skipped.
• With timestamp: Use the MasterTimestamp.ino file to upload to master. Add timestamp to each measurement.

Both codes request data from slaves each second.

The breadboard planes and schematics are made with Fritzing.

Components:

• 3 Arduinos (UNO or Nano)
• 2 DHT11 (1 for each slave)
• 2 Potentiometers (1 for each slave)
• 1 DS3231 (RTC module)