User:Haukur

Haukur Sölvason

Haukur Sölvason

Final project proposal - Warning system for monitoring freezers and coolers.

File:Final.png

Final unit

The aim is to build a unit that can monitor temperatures and precense of power to freezers and coolers and upon failure sound an 80 db alarm, if no one is present it will then send a sms to a mobile phone.

Embedded programming (November 25)

Assignment

 read an AVR data sheet
 make serial and programming cables
 add (at least) a button to the serial echo hello-world board
 modify the serial echo assembly program to respond to the button
 modify the serial echo C program to respond to the button

When making the Hello.Echo.44 board we did not have any of the newer connectors. So I deceided to use the Hello.echo.44.MTA board and modify it, add MTA power connector and another 5 pin MTA connector so I could connect it to a bread board and do some experimenting with the unused pins of Attiny44.

I opened Hello.echo.44.MTA.cad in Cad.py and there I worked on the modifications.Everything was working ok and I did rendering from time to time to see the changes. Then I took the modified file to the computer the Modela is connected to and set it up to make the board.

I went through the whole procedure and pressed send to maschine,it said it would take 30 min to complete but didn't start. I tried again and again but all of my efforts were to no avail,the Modela didn't start.

Back to the drawing board I opened the modified Hello.echo.44.MTA.cad in Cad.py and started to work on the file,however when I tried to save the file, Cad.py did not respond,so I closed Cad.py. The file was there on the desktop but Zero Byte. After many tries I finally managed to solve both problems and got it to work.

Well I'm not completely 100% sure what the problem or what the solution was,so I´m going to try to replicate it and post it here after I'm 100% sure.

Problem 1 the contents of the file vanishes ?? Problem 2 the Modela won't start ??

Here is a picture of Hello.echo.44.MTA board befor and after the modification.

Hello.echo.44.MTA.Mod.png

And no I did not forget to remove the excess copper,instead I want to try to add some circuit to the unused area.

Here is the board unpopulated,and here the residents have moved in.

The soldering went without any problems and the board worked ok after programming.