The first thing I learned was that I had two problems. the gauge of solder I was using was too thick. I needed about a 23 gauge solder, but what I had was about 16 gauge solder. The second thing I learned was that the point on my soldering iron was too big, however a little work with a file, and I was able to take the size of the soldering tip down to what I needed.
As you can see in this picture, because the gauge of sodder I had was too thick, I ended up with these big ugly clumps of sodder at the top of the unit, and because the iron wasn't sharp enough, I was melting the silicon on the board when I soddered each point.
When I got to the 14 pins in the middle, and the 7 pins on each side, I had sharpened my soldering iron and gotten a smaller gauge solder. So there I didn't have the huge clumps of useless metal. I have a strange feeling that once I get around to testing this thing, the extra solder will need to be removed, but my friend didn't come over with his multimeter, so I haven't done that yet.
However, at the very least, I must have done something right, because when all was done, the XBee chip slid right into place, and the USB adapter worked fine.
Now, I guess the next step will be to get some form of software to work with the module. Then I will be able to flash the firmware, and start transmitting some data.
My next step is to get my second module in the mail (I know, I was stupid and only ordered one module so it doesn't really do anything yet.)
However, I do have my Kill-A-Watt, so that means I am one step closer to my goal of having a way to log my power usage into a database! The original project was called a Twit-A-Watt (post power usage to twitter, but I really didn't care about the twitter part. Just a way for me to see how much power I am using.
The cool part is that right now, I know that my DSL bridge and wireless router have used .02 Watts in the past 2 hours (.01 Watts/Hour.) I guess it's not as cool as sa hooking it up to my TV, but it is something.
Actually, I should probably just hook it to my TV and see what happens. OK, that's what I'm going to do now.
Oh, BTW, I have a few web pages that I want to note here so other people can do what I have done:
The web page for the original Tweet-A-Watt project
The general steps I have taken so far are:
- Buy a P3 4400 Kill-A-Watt I chosse newegg.com because they had the right price.
- Buy 2 Xbee modules, and 2 Xbee Adapters and a FTDI (USB) cable.
- Assemble the XBee adapter kit
So, yea, that's what I've done so far, and now I have to work on the software aspect of getting the Xbee to do something (anything!)
So, that's all for now, and I'll keep updating as things move along.
Later,
SteveO
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