Weekly Assignments Final Project About me

11. Networking and Communications

This is networking week. The object for the week is to design,
build and connect wired or wireless node(s) with network or bus
addresses and a local input and/or output devices


I decided to go with 2 Arduino Uno R3 boards to communicate via tx/rx serial communication.
It took me a little while to get the connection established. I tried several different boards
but kept on getting failed results. I experimented with Esp32 wroom32, rp2040 xaio, as well as
Arduino Uno R3 & R4. I figured out what was causing my issue.



The two issues that I kept running into were the "avrdude error" & the "upload failed exit 1 error".
I was able to fix the errors and move on with the assignment. The "avrdude error" was caused by
having the wrong programmer assigned. The error went away when I used the 'Arduino ISP' as the
programmer. As far as the upload failed error, there were 2 culprits. I was using a cheap usb-c
cable that didn't carry data well. I switched to a better usb-c cable that I also use for my VR
headset. In addition to switching cables, I also discovered by trial and error that I was running
the serial monitor before uploading the code or while trying to upload the code and I got an error
everytime until I stopped doing that. So when I wanted to see values in the serial monitor I waited
until after the code finished uploading then clicked on the serial monitor to see the data.
The last thing that I did to correct my errors mainly on the serial communication part, I made sure
that I uploaded the code to each board first (individually). After the code has been successfully
uploaded, I then wired the the to arduino boards together. I connected the 5v of board 1 to the vin,
the GND of board 1 to the identical GND on board 2, the tx on board 1 to the rx on board 2, and lastly
rx on board 1 to the tx on board 2.


Successful Serial Communication

Here are a few images of the devices & code




Below is the code files for each arduino uno r3 board

Arduino that sends the message

Arduino that recieves the message