Hardware

@punter9 Given it's a 5 volt module, powering it with 9V is not a good idea. The specs on the Songle relay indicate that it draws about 90mA. The official Nano has a 500mA 5V regulator so if you don't have too much else connected, that should be fine. If you are using a Nano clone, then take a look at the specs for the regulator it uses. Cheers Al

@BartE Thanks for that. My issue ended up being with the signal lead from the sensor to the arduino. A bad connector. Your advice on the pull-up resistor was very useful. Thanks

@Anticimex said: @Oitzu it should work just fine. Thanks. Ordered this. :+1:

thanks for the clarification. I'm not going to use the regulator at all, as I'm powering the whole setup with a HLK-PM01 (when it finally arrives).

@twosh any update on your project? I have exact the same setup, would love to see your code :-)

@MikeF Well not limiting, but reducing. Connect one or two ordinary diodes in series with the input, and you will reduce the voltage for 0.7V for every diode.

@Cliff-Karlsson Hi Cliff, I ordered one a few days ago and as far as I understand, the only other thing you need is an sd card to transfer the design from the editor/pc to the display. You can connect with an ftdi adapter, but it's much faster using the sd card. The cable to connect it to an arduino is included. Cheers Al

The library which @tomkxy posted works great for 8mhz processors. I have let it run for more than 24 hours without receiving a single timeout or checksum failure.

@ahhk said: Hi, i searched a lot and read a lot about step-up and step-down converters in the last days, but i didnt find a really "good one" - and already soldered on pcb. Soldering is in general not a problem for me, except smd (i hate smd soldering). Has anyone a hint for a good booster (2xAA => 3.3V) or a step-down-regulator (3xAA => 3.3V) ? Greetings Andreas How about this? http://www.ti.com/product/TPS82740B/description&lpos=Middle_Container&lid=Alternative_Devices

Hi guyz, i just wanted to ask if I would need to make any modification to the code if i were to switch my current Ethernet gateway and my sensors from NRF24 to RFM69

Use the + version on the gateway ;-)

I use http://forum.mysensors.org/topic/838/windows-gui-controller-for-mysensors for logging the communication between the controller and the nodes.

is there a way to display these things (temp sensor readings) on to a web page?

i use 2cell 7.4 volt recycled laptop battery packs for my projects thay have a natural discharge of 5% a month but do some reading and research on how to handle and charge them...and you should be fine..plus recycleing lappy batterys is good for the enviroment..and you also learn about the new breed of batterys and cells :)

Network topology is the bargain of the assorted rudiments (links, nodes) of a computer network. Fundamentally, it is the topological arrangement of a complex & may represent actually or reasonably. link text

@DNKROZ said: Hi. I recommend you to check the relay example, the sketch includes support for multiple relays and you'll understand what do do in that scenario, but answering you initial question, no, I'm afraid you can't do gw.present(CHILD_ID, S_DISTANCE1, S_DISTANCE2, XXXX); but you can do gw.present(CHILD_ID1, S_DISTANCE); and gw.present(CHILD_ID2, S_DISTANCE); after that one... and... so on, you'll see better reading the relay sketch. Interesting, where is this Relay sketch? Regards

@rvendrame said: Even being the RFM69x demanding for more power? I guess it makes the diference for battery operated nodes. Jeenodes says "The conclusion here is: for these types of uses, with occasional brief wireless sensor data transmissions, the power consumption of the wireless module is not the main issue. It’s far more important to keep the idle (i.e. sleep mode) of the entire circuit under control." http://jeelabs.org/tag/lowpower/ So, taking that literally, hopefully the RFM69HW high Tx current consumption won't be an issue.