Slow Button/Switch Reaction

On my last project– which still isn’t done yet- the buttons for changing the temp display are very unresponsive.

The reason of course is because the Arduino has to loop through all the main code before getting around to checking the button status.

I found the cure! Interrupts!

EngBlaze has a great write up on how to use this. Whew! One less I have to write! Read it here. I’ll be modifying the Tri-Temp code to use interrupts soon. Sweet!

Tri-Temp Project Intro

Description

This is the Tri-Temp project. It comes in two flavors- Standard and Ethernet. The Standard version outputs all readings on an LCD. The Ethernet adds output to HTML via a web browser. I did not design this to use an Ethernet shield- only the Arduino Ethernet- it’s more compact.So what’s this all about? Reading the Temp and Humidity! Nothing special going on here, just reading the digital data from three DHT22 sensors and displaying it.

Continue reading “Tri-Temp Project Intro”

Arduino board graphics

You’ve seen them. Those really nice graphic depictions of arduino boards and their wiring schematics. They’re all over arduino.cc and their examples.

I’ve looked for them. I thought they could be Visio templates or something.

Well I finally found them!! They come from a software program called Fritzing. It’s an electronic design automation program. Check it out!

http://fritzing.org/download/

It’s free too! Now I can make pretty schematics!! Thanks to fritzing.org!!

I’ll post a review soon.

Tri-Temp project

Coming soon- the mostly completed Tri-Temp box. Two editions- Standard and Ethernet. I’m still finishing it up and have lots of pictures.

  • Measure temperature and humidity from three locations via digital probes
  • Self contained in a small project box
  • Standard uses Arduino UNO
  • Ethernet uses Arduino Ethernet
  • Uses 16×2 LCD to display on Standard version
  • Ethernet uses LCD plus web interface!
  • LCD interfaces with Arduino via serial- no hogging all the digital lines!
  • It has its own logo!
  • Internal temp monitoring….just because
  • 3 wire External digital probes are pluggable and cheap!
  • Runs on 9v battery (don’t know how long yet….)
  • 4 interface buttons on project box to control the display

I should have it wrapped up and posted soon. The code will no doubt be a constant work in  progress but the hardware is almost complete.