New #WidgetBoard boot loaders available for download

New boot loaders for the WidgetBoards have been uploaded to both SVN and to the downloads area.  The fuse settings have also been updated in the documentation.

I’ve also integrated the Atmega328P version of the WidgetBoard into the Arduino development environment so please update your boards.txt with the one from SVN.

#WidgetMesh Gateway continued…

I’ve had some mixed success with the serial port hack on the Airlive device since my previous post.

After setting up the uclib development environment I have now successfully compiled avrdude so I can program the RFM12WidgetBoard located inside the device, however I had a couple of issues when trying to talk to the WidgetBoard.
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Update;Yes I’m still here!

I’m still alive…… Its been awhile between blog entries, unfortunately this is the busiest time of the year for me at work, the few months after the Australian financial year, projects are kicking off due to funding etc. There is however light at the end of the tunnel and I’m hoping to get back to geeking very soon 😀
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Building Widgets – My SMD Build Process

Well, back from a short break away (kid free woohoo!) and onto some widget builds. I thought I’d document how I do my widget construction. I actually find building SMD devices much easier than the PTH variety.

I have all my components in some neat snap together containers, this allows me to have everything at hand for the build.
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Widget running on the smell of a single AA

For the next version of the widget, I’m planning to have an on board boost regulator. This design will allows the widget to run from just about any voltage source as low as 0.7v (so NiMh will be fine) and up to 5.5v, this boost regulator in conjunction with a standard LDO regulator will give me a nice input voltage range of 0.7v – 12V. Before I finalise the design I wanted to test things to see how well it’ll work.
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Widget Sensor Housings

I want to deploy widgets around the home, both inside and out, so I needed to find something that would allow some protection from the environment to the electronics, cheaply and easily.

On the weekend while doing some shopping I found the solution in the kitchen area of the local discount store, at $1.50 a piece it was the right fit for the job. They probably won’t like U/V in the long run, but will see how they go, at that price I can replace cheaply.
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Reading Widget Battery Voltage

In my previous blog entry I described adding a solar cell to the widget and how I could measure the voltage produced by the Solar Cell, however I still need to monitor actual battery voltage easily, and preferably with not a lot of additional hardware.
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Build Documentation

Strobit RFM12B PCB Layout

I’ve started to document the Wireless Widget Board in the wiki, documentation is currently all over the place, but slowly getting there.  Currently I’m working on the build instructions so those of you that I’ve sent PCBS to can at least have a parts list.  

I’ve also put up an initial bill of materials. But it would be great if someone can do a Octopart BOM and share it.

Initial building instructions can be found here: http://code.google.com/p/strobit/wiki/Rfm12BuildingInstructions with more to come.

Strobit Wireless Widget Photos

I had a chance to grab a few photos of the progress so far, also helps that most of my components that I had on order arrived today so the boards has been kitted out with all the headers. Now I can plug the prototype personality in, still waiting on my crystals, switches, and diodes.
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Preliminary RF Tests

Today I did some testing on the RF side of things,  nothing scientific, just walking around the house seeing if it would dropout or report bad checksums, I’m happy to reports all is working as expected (using the 915Mhz RFM12B module)

The tests are done by using the RFM12B Example sketch found in the JeeLab RFM12B library by Jean-Claude over at Jeelab (RFM12B Arduino Library)

This library runs unmodified on the wireless widget board, just follow the instructions in the README about setting up node ids.

From the preliminary testing using some compact 1/2 wave GSM 900MHZ/1800MHZ antennas (http://www.dealextreme.com/details.dx/sku.5237)  I’m easily getting all the way around the house with no dropouts, have yet to do outside tests.

And they multiply…

Today I constructed another 2 boards, very easy to do all done in around 30 minutes. This now brings the total to 3.

Applying the boards with solder paste by hand, manually placing the components, bake them in the toaster oven together. This time I got the LEDs the right way around and the right amount of solder paste on everything, no bridges on the CPU pins and looks like the right amount of fillet on the RFM12B module, very little cleanup work required, it’s amazing how little solder paste is required.

Add another 5 minutes to hand solder on the SMA connectors and program the boot loader on each, voila all done in around 30 minutes.

Now I have a potential “Network” I will start testing the RF side of things. Currently I’m using the 915MHz modules.