It is important to notice that difference between ATTiny Pin number and the board Pin number. RX : ATTiny412 Pin 4 - Board Pin 5 - UNO 0 (RX).TX : ATTiny412 Pin 3 - Board Pin 4 - UNO 1(TX).

VCC: ATTiny412 Pin 0 - Board Pin 3 - UNO 5V.

GND: ATTiny412 Pin 8 - Board Pin 1 -UNO GND.

Thus, both the ATTiny chip pin structure and how it is connected to the board need to be specified.īased on the structures, in my case, the mapping between the Pins should be: In my case, there are two sets of pincode mapping: (1) between ATTiny and the board and (2) between the board and UNO. This board will be connected to the computer via the Arduino Board, so determining the right Pins to wire is an important procedure. The second step is to program the microcontroller with an ATTiny412. Tool>Board: Arduino UNO >Port: >Programmer: AVRISP mkll>UploadĪrduino UNO board Node 2. In my case, I used the USB cable to connect the Arduino UNO board to the computer. The code are shown as below, which refered to Jari's archive.Ĭonst char node = '1' // network addressĬonst int ledPin = 13 // the number of the LED pin, which is 13 for UNO board The first step is to program the Arduino Uno board to response to input node number. Serial Communication Mechanism Node 1.Arduino Uno board The core mechanism of this type of serial connection is to let the devices share the Tx and Rx input.

This assignment has referred to Jari's archive about this topic. In this week, I decided to simply connect my Arduino UNO board and the microcontroller with an ATTiny412 chip that I made in week 6.

Attiny85 serial port