Networking and Communications




Week Thirteen.

Group assignment:

  • Send a message between two projects.

    • Individual assignment:

  • connect, build and design wired or wireless node(s) with network.

    • Learning outcomes

  • Establish workflows used in network design.
  • Implement and understand networking protocols and/or communication protocols

    • ________________________________________
  • This week task is I to communicate between two microcontrollers using I2C protocol.
  • The master will relate to a push button.
  • To light up the LED the signal will be transferred throw the slave Arduino.

    • I2C protocol

  • One of the important things that I do every week before I start working on documentation, I must make my own research to understand about it.
  • To know more about electronics, I referred to the Arduino Community.
  • The following Tutorial was good.
  • I2C https://i2c.info/ is a serial protocol for two-wire interface to connect low-speed devices like microcontrollers, EEPROMs, A/D and D/A converters, I/O interfaces and other similar peripherals in embedded systems.
  • I2C uses only two wires: SCL (serial clock) and SDA (serial data).
  • Both need to be pulled up with a resistor to +Vdd.
  • There are also I2C level shifters which can be used to connect to two I2C buses with different voltages.

    • Arduino Communications

  • I communicate between two Arduinos using I2C protocol.
  • The master will be linked with a push button.
  • The signal will be transferred to the slave Arduino that will light up the LED.

    • The code as following:

  • #include : this will call the library so that will allows to communicate with I2C devices.
  • Wire.begin(); this will launch the Wire library and join the I2C bus as a master or slave. That will normally be contacted only once.
  • Wire.beginTransmission(); that will begin a transmission to the I2C slave device through the given address.
  • Wire.write() that will send data from a master to slave device.
  • Wire.endTransmission(); that will end the transmission to a slave device.
  • Wire.onReceive(); that will register a function to be called when a slave device receives a transmission from a master.
  • Wire.read(); that will read data which was transmitted from a master to a slave.

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