Open source

Problem with Jeenode V4

(Just to start with a bit of background - I've got 8 Jeenodes so far - 4 of these hand soldered without any real problems except for turning the radio the wrong way round for the first one)

I received my first 2 Jeenode V4's a couple of days ago - and soldered them together, and started them up.

Both displayed the same behaviour - where the prompt for the Demo sketch cam up as one line, with no further activity.

I have spent a bit of time trying to find out why - including using a magnifying glass to check my soldering etc.

In the end I had to start software debugging - and it all ended up with these lines in RF12.cpp

" // wait until RFM12B is out of power-up reset, this takes several *seconds*
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The software measure our gas usage in the house is coming along slowly - I have attached a LDR to one of the Jeenodes and found out the light level when just the pilot light is on, and the light level when the burner is on.

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so I can now detect the transitions when the boiler turns on and when it turns off, and from there calculate how long it was turned on for.

This all looks a bit strange at the moment :

IMG_5042
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Found this javascript based Twitter monitor that can be easily embedded in your own pages - and keeps on updating your Twitters.

I quickly changed a copy to fetch messages from a status.net based site

monitter? what is it?
Simple. It's a twitter monitor, it lets you "monitter" the twitter world for a set of keywords and watch what people are saying. Cool huh?

[From monitter : real time, live twitter monitor | free live twitter embed widget]

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For my home automation project I needed a general purpose protocol to send data (and text) from a server to a Jeenode:

- First to control a multi-line LCD display

- To control "things" connected to a Jeenode remotely (and wirelessly of course)

The first project is to control a set of fans mounted in a boiler cupboard that gets way too hot occasionally, and to control a display on top of the cupboard.

The temperature is already reported to the server from another Jeenode running a unmodified version of the "ROOMS" sketch reading from a temperature and humidity sensor (SHT11).
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I've created a page for sample code for accessing data from the Wattson energy meter.

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