Instructables

Internet of Things

Picture of Internet of Things

Measure real world things, turn a knob and move a servo on the other side of the world. This has been possible with a PC but now it is possible using inexpensive boards and low or battery power. This project uses pre-made Arduino boards and no soldering is required.


This project was inspired by this Instructable http://www.instructables.com/id/ARDUINO-ENERGY-METER/

 
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Step 1: The internet of things - smaller, cheaper, less power

Picture of The internet of things - smaller, cheaper, less power

A standard Arduino board is now under $10. A W5100 Ethernet shield is also under $10. A LCD keypad display shield is under $6. Debugging Arduino can be done via the serial port, but for out in the field there are some advantages to having a display. Adding a display can be done in many ways, and for this project we are looking to use premade boards. There are two small catches - some pins clash with the Ethernet shield and the LCD shield, and also the display shield shorts out a few pins on the metal of the Ethernet plug, so it needs to be raised up higher.

To get a cheap board, search Arduino on ebay and sort on price+postage and “buy it now”. Then for the Ethernet board, search on Arduino Ethernet. For the display board, search Arduino LCD Keypad.

TheRafMan1 month ago

Hello James,

I like your Instructable, simple and straight to the point.

The one thing I would recommend is NOT to break pin 10 off the LCD shield.

Bend it on the stackable header instead: cheaper solution and it saves the integrity of the shield. By bending it, you will also have the option of soldering a wire to it and attach it to an unused pin.

BTW, I also use the TP-Link solution and there is an even cheaper and more versatile solution: TL-WR703N Mini Portable Wireless Router (US $24.50) which can be easily be upgraded to OpenWRT. Just make sure you get the English Firmware or you will have to learn Chinese like I had to do when I received mine...

James Moxham (author)  TheRafMan1 month ago
Excellent idea - bend it rather than breaking it off. Thanks++. And thanks for the router ideas - as time goes on these seem to get cheaper and use less power. Cheers.

Nice instructable - well written! Concerning the router idea - I've already used the WR703N as a wifi bridge for my Arduino projects. If you're interested - I wrote up a short tutorial how to prepare the WR703N.

http://en.code-bude.net/2013/01/29/how-to-build-a-20dollar-low-cost-openwrt-router-flash-openwrt-to-tp-link-wr703n/