Hardware

Depending on what gateway you use, another solution could be to implement an MQTT client on Arduino, see http://knolleary.net/arduino-client-for-mqtt/

this is a HopeRf chipset, there is a post on supporting RFM12b already

@BulldogLowell That's exactly right. You stated it more clearly than I did. It's not a problem if you're careful in how you set up your if test but its does warrant a warning to be careful in that regard to anyone using mills() for timing their sensor reads.

@axillent Awesome!

Just got some parts and did some more testing on this so I thought I'd post a reply. The good news is there appears to be a cheap fix. As @Hoffan suggested I did some research on LED drivers. I found this one to work in my testing so far: http://www.ebay.com/itm/181113937482. I have plugged it in directly to the 12V source for 3 hours and it gets warm (maybe 100 degrees Fahrenheit) but by no means hot. I still need to connect it into my sensor and get it working with PWM. My plan is to limit the current before the MOSFET. I hope it works! Thanks again for all the help and suggestions!

ATmega328 is 8 bit.

Cool :) This is my initial sketch, but i'm still tuning it. http://forum.mysensors.org/topic/597/motion-relay-sensor-sketch-help I need to figure out only to send GW messages on an update.

Search for SoftSPI.

Hi.... hehe... I must decode it from source code?? hmmmm... interesting... where I need to write my question? power down mode .. every 1 sec wake up .. using timer2 32kHy crystal 2.make sensor with more sensor type in one device .. for example .. temperature , energy meter, bin input state.. etc..

Hmm.. it's microchip processors.. Almost a naughty word in my surroundings (I'm a member of a small group of atmel geeks :))

I have some 50pcs sample 1206 10uF ceramic caps that I got from AliExpress the other day. Purported to be X7R. I measured them (7 of them at least, it's tiresome to pick them up with pincers from the reel and put them back) with my DMM and they all checked in at between 9.5 and 10.1 uF or so. After having soldered two of them for prototyping, and heated them somewhat obviously, they measured at about 10.5 uF so not much of a change either. Is this information enough to say that the rating for these caps is good enough? Can't prove that is is X7R or whatever I mean, but that they at least can't be bottom of the barrel so to speak ...

Unfortunately I think that the memory is to small on that device. It only has 8Kb of flash, whereas the 328 has 32Kb. Actually the 328 is (more or less) a atmega8 with 32Kb flash instead of 8 (same pinout, if my memory is correct) / Thomas

@gregl said: i think on mine the solder pads are bridged... but i will check. I am pretty sure it's the same (5V as default) for me but will double check.

The Radiohead Library should have support for multiple types of RF modules BTW- http://www.airspayce.com/mikem/arduino/RadioHead/index.html

@soward said: these were covered to some extent in another topic FYI: http://forum.mysensors.org/topic/479/the-new-esp8266-wifi-models