General Discussion

Good to see there are also MQTT client libraries for Arduino (Part 2) Parts 3 and 4 are about a controller / graphing solution. For sure nice, but I personally like to keep my data on my devices.

@hek Oh so those SPIs can be connected in parallel. The challenge is that the vias for MISO and MOSI are hidden under the screen so wiring is tight to say the least. I have two extra microviews without bootloader and flashing that requires using those internal vias https://learn.sparkfun.com/tutorials/installing-a-bootloader-on-the-microview But even doing that might be out of my league. I could give one micoview free to someone in return for flashing them with bootloader and solving the issue of soldering the wires for the radio (SPI) so that the display still works.

@Vodden I also am doing a Reno and have the option of putting in cabling throughout the house. As I already have POE camera's to install I have a POE switch. So was looking into options of at least powering the sensors with POE. I have based my sensors around the Nano so wanted to convert the POE output to USB voltage and ideally plug the sensor in using a USB cable. After some research this seems to give me the POE to 5V for $13 http://www.pccasegear.com/index.php?main_page=product_info&products_id=26091&cPath=1657&utm_source=googlebase&utm_medium=cse&utm_campaign=export_feed#googlebase The sensor package itself will still be cheapish as most of the arduinos will be running more than one sensor. It is also cheaper and easier than using an Ethernet shield and having to hack it onto the Nano's All I need now is to find a cable with a jack on one end to a USB mini. Anyone have any ideas?

@hek said: http://www.bitreactive.com/concurrency-in-iot/ If it is the same I used them when I programmed in Cocoa. At first a 'bit' difficult but once you understand quite nice. Don't know if it is the same though...

Some recent news: Combining OMRON’s electret energy harvester with a Holst Centre/imec power management IC, it can convert and store energy from vibrations in the μW range with high efficiency to the driving voltage of general sensors. μW .. say 10 μW then with 3 V you have a current of 1 μA and if you believe Power saving techniques for microprocessors that should be possible in sleep with the watchdog disabled (0.1 μA) but not with the watchdog enabled (4 μA) But .. just wondering why not using a battery? Is it because you think it saves energy? The embodied energy used to produce these devices is for sure larger than they ever will generate, see the articles on http://www.lowtechmagazine.com or http://www.lowtechmagazine.be, for instance The ugly side of solar panels. Is it fun? Yes! But do not foul yourself thinking this is saving energy. ;-)

@hazymat said: What's the maximum length of cable I should use to connect the sensors to the nodes? I'm thinking CAT6 cable for e.g. 3 sensors in a ceiling back to a nano. Then another CAT6 to another sensor in a different place back to the same nano. Approximate distances of a given run would be 5-10m. At this moment i have DHT22 connected by about 12m long wires from ethernet cable, and it's work ok, but before this i tried to connect ds18b20 by 1-wire protocol directly to Raspberry Pi, and Domoticz, and it didn't work.

@kolaf said: Why is this very difficult? It all depends on your (software) skills of course, but currently the MySensors sensor class is implemented as a derived class from the NRF24 class. Probably the easiest way to implement this for your radio would be to emulate the NRF24 interface in the driver for your radio. Only change required for MySensors would be to derive from your new class instead of NRF24. The NRF24 interface is quite stable while MySensors still changes now and then...

@epierre said: BLE http://en.wikipedia.org/wiki/Bluetooth_low_energy

I think you should go with Eagle and KICAD as these are free ware and a lot of tutorials are available to teach how to use these software and I personally recommend Eagle as PCB manufacturers accept the Eagle files to build the boards and for cheap PCB boards you should look at some manufacturers with manufacturing facility is in China. pcb fabrication

If I search ebay being based in Holland, I see you can get a boards with a W5100 from the UK, Germany and Italy for reasonable prices (13 Euro, 4 Euro shipping). What happens if you search ebay from Sweden and do not set Worldwide?

@clippermiami said: Is it possible I have to reinitialize the Gateway for some reason? No, you shouldn't need to reinitialize gateway in any way. Can you see the presentation message for the node device in Vera logs? Did you try restarting Vera to reveal any hidden devices (has happened before)?

@C4Vette Thank I will order one :)

Hello, I have tested the DHT11 for one day with a THGR810 from Oregon (assuming it is pretty calibrated). They were close together. There are some time the DHT11 moved but not the Oregon. Generally it was 1% below so pretty good. On Temperature there is more gap, it varies from 2°C+/-1°C below, it is more puzzling here. I have not yet DHT22 to do this check-up. Would one day adjustment values sent by the gateway to the sensors ;-)

I was playing around with this yesterday and noticed something peculiar, it consistently reports the compiled image as several hundred bytes less than the same sketch in the Windows IDE. I haven't tried executing the compiled sketch yet so I don't know if is just a counting anomaly or if it failed to compile properly. I have ro get a cable adapter for my Nexus before I can upload to a Arduino to find out.

@marceltrapman it will have grove compatible connectors Track will be both sides

For others: As written in another topic : http://forum.mysensors.org/topic/111/can-t-control-actuator#747 i also enabled "newline" in the serial monitor to sent commands, and now it works. Thanks Hek for help.

Yes, you can send data to and control a sensor/actuator.

@axillent I searched and searched before I posted the question and it turns out, it is in the arduino IDE already. shiftOut() thanks

Hmm mixing things up big time here :( I am going to take a break...