Hardware

For the 2.4 GHz part, the nRF is a transceiver meaning it does both TX and RX. For the 433 mhz part, the PCB referenced in the first post has an "Aurel RTX-MID" which is a transceiver and thus both TX and RX so you can receive RF signals from 433mhz devices and also send commands via RF to 433mhz switches, doorbells etc. The software provides state switching signals to control the transceiver mode if one is used. Of course you do not need to use a transceiver, seperate TX and RX modules works just as well. You can use almost any a separate receiver and transmitter module like mentioned before.. For sending you can use a cheap Chinese transmitter (like the FS1000A XY-FST from the XY-M5-5V set) which can be nice as many people have these lying around.. The receiver from such a set is in most cases pretty poor because it receives a lot of noise. (Btw, these Chinese sets seem to perform a little bit better at higher voltages.)

[image: 1437383494920-img_3349.jpg] Here with installed HML5883 Magnetometer, but sadly doesn't work. Don't know why, but i decided to rework the design and replace all I2C sensors with a Solarcharger/Supercap-PowerSupply and add a voltage booster for 5V.

@Yveaux no no no.... I didn't explain myself well I guess. The mysensors node "press" buttons on a universal remote control, see http://forum.mysensors.org/topic/1662/air-conditioning-hvac-control-work-in-progress The universal remote is powered from the arduino as well. As long as it is powered it remembers the settings for the aircon. once I power down the node the remote powers down as well and has to scan to find the right settings.

@gregl , why didn't I think about that! Great tip! I might buy the joint I linked to in my first post but then use a standard bolt and drill it open for a standard DS18B20 water proof temp sensor which I allready have laying around is really simple solution. Thanks! Will try to get back with pictures when this is done... ☺ Henrik

:thumbsup:

@Viper_Scull Domoticz supports V_VARs, just not as a viewable or modifiable value on the controller. It will store and return the V_VARs values for the sketch, nothing more.

@Sparkman thanks man, i finally got 2 nrf24l01 just for testing and now i would like to test an example for a dht11 and 2 relay, can you help me? do i still need something else? i'm trying to follow TimO example but without luck. I have an arduino mega and uno too, an ethernet shield and 2 nrf, a few sensors. I would like to make a serial gateway or a ethernetgateway and to connect dht11, 2 relays and a sct-013-00. can anyone help me? any help would be kindly appreciated. thanks all.

@blacey oh i see. My pro mini has vin written on the raw pin so i mixed it up. Thanks!

@Moshe-Livne Sweet. thanks.

@Moshe-Livne said: In what way is it better? The datasheet states that to wake an ATMega from sleep from a PIN0/1 interrupt it should be configured as LEVEL interrupt, not CHANGE (second parameter to gw.sleep() ) It is likely to work when configured for CHANGE, but under certain conditions the interrupt may not be detected correctly by the ATMega.

Please send an email to info@mysensors.org with your ideas and questions..

@Ivan-Z Thanks. I have seen this in another thread. Decided against it for several reasons. This sensor should be asleep 99.9999% of the time. According to the legends this battery should power my sensor for years.

Thanks. I tried it now and it is working without any problems.

I think the trick here is that they just announced a $40 4.3" monitor and you’ll have to spend additional cash for the VGA or HDMI adapters. http://ardevon.com/2015/07/chip-the-worlds-first-9-computer/

@tbowmo nope, still no go. strangely, when i disconnect the arduino from the computer (so it is not powered), it creates a short after a few seconds and the bell starts ringing continuously.

@Moshe-Livne said: @Sparkman would have been nice if they could charge from motion, wouldn't it? :laughing: That would be great:smirk:

@AWI Yes i am. but there is mistake in the picture the R3 is connected between Pin 3 and VCC, not ground (pull up resistor). Then that leaves me hanging a bit because that is way more than I will be comfortable with in terms off battery changes. Any suggestion what to do?

My unmodified iBoard is working for months now as a gateway without problems. Initially I had some problems with hanging connections. But these problems disappeared after replacing my 1$ power supply with a 3$ one. The iBoard needs a decent power supply.

@Moshe-Livne there already is a 4u7 capacitor for the radio, on the sensebender. in theory, it could be used with cr2032 battery, but I doubt that it would last long..