I need 2 433 Mhz Sender with pimatic because of distance. My Idea: use 2 Arduinos with Homeduino - is this possible? I don’t want to use 2 Raspi’s for this, so my idea is to use the second USB port with my second Arduino. Maybe it is possible to use 2 433 Mhz Sender with one Arduino Nano - but I don’t know how. I tried this - but it doesn’t work. Have someone an idea how to use 2 433 Mhz Sender with pimatic?
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Homeduino with 2 Arduinos
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…and I don’t want to use Rapis GPIO Pins for the second one because of cpu usage and I also intend to use a 3th 433 Mhz Module.
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@chris321 said:
Maybe it is possible to use 2 433 Mhz Sender with one Arduino Nano - but I don’t know how. I tried this - but it doesn’t work.
How did you try it? You can have two modules send the same thing if you wanted to but I don’t know about possible collision of the signal or other effects. If you wanted to do so, just make sure that both modules get power and connect both of their datapins to the arduino pin for sending.
Home automation is the model railway of this decade.
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@chris321 CPU usage wouldn’t be an issue when having only the sender in RasPi GPIO. Receiving is the part that stresses CPU.
Still, I don’t understand what you will achieve by using 2 senders from the same location. Care to explain?
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I use a longer cable for the second sender to another room, the first sender isn’t able to reach this room with it’s signal (with antenna). I used the same pins for the second sender - this doesn’t work, therefore my idea with the second arduiano nano. I don’t want to use batteries for the sender.
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Well, maybe there is an issue with the length difference and therefore the signals may collide.
What module and antenna do you use?Home automation is the model railway of this decade.
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I use Aukru 433 Mhz sender ( http://www.amazon.de/gp/product/B00R2U8OEU?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00 ) with 17 cm antenna. I have thick walls in my basement - I assume it’s not the quality of the sensor or the antenna.
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Why not batteries? It’s just that there are 433Mhz Repeaters working with batteries that you can buy. Nexa etc. They cost around 15EUR.
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The probably most successful solution would be to buy a good receiver we recommend to use the 3400rf kit, especially the receiver known as rxb6.
have a look here http://forum.pimatic.org/topic/487/hardware-tip-433-mhz-receiver-for-pimatic
all other methods for getting better reception won’t be of any use without proper hardware.
I think, this receiver will solve most of your problems.pimatic v0.9 has been released!
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Until yet I used already batteries with 433 Mhz Repeaters (just with my remote control - without Raspi) - changing batteries is annoying - I want a perfect solution without overhead. No idea how to use pimatic with two arduinos. You are right with CPU overload - with just the senders it should not be a problem, but again than I’m limited to two 433 Mhz senders. I’m also planning to have remote control for my light on my terrace outside of the building (with 433 Mhz remote control) - therefore I will need an additional (3th) sensor (I assume) - my raspi is in my basement. So my first choice is to use more than 1 sender without of batteries with pimatic. The sensors should be attached with longer cables to the Arduino (or GPIOs on the Raspi) - that’s my prefered scenario. Is there nobody out who use more then one 433 Mhz sender with pimatic on one raspi? Is there a wiring diagram available which should work with pimatic also with longer cables (appr. 10 meters)?
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@chris321 With such long wires betweend sender/receiver and arduino (or RasPi) you will definitely get into trouble with signal integrity. The signals betweend these are high speed, low voltage signals which are susceptive to interference. Don’t know which wiring you are using, but with straight wires you are basically adding a few 10m long antennae… Oh and then there is also a possible voltage drop. It is advised to keep the wires between uC and RF-RX/TX as short as possible. What I would advise is a pilight-kind of approach: setup several nodes throughout your house which are able to send and receive 433MHz signals and communicate via ethernet/wifi with pimatic.
Personally I have plans to setup a ESP8266 as a homeduino node which should be able to send and receive 433MHz signals and preferably communicate via MQTT (or maybe http) with pimatic. Off course it then should be possible as well to attach some sensors and/or actuators to the ESP, i.e. DHT22 or a relay. There are some great projects out there already, probably just need to combine some stuff to get this working
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@Rene-Arts - thank you. What do you mean with " setup several nodes throughout your house which are able to send and receive 433MHz signals and communicate via ethernet/wifi with pimatic." Does it mean one raspi for each node with pilight - with pimatic “central administration” from one raspi?
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@Rene-Arts
sounds very interesting your esp project.
Please keep us informed@chris321
I doubt that it is possible to have more then one homeduino instance running with pimatic. Maybe it needs some advanced core programming for that.pimatic v0.9 has been released!
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@chris321 said:
@Rene-Arts - thank you. What do you mean with " setup several nodes throughout your house which are able to send and receive 433MHz signals and communicate via ethernet/wifi with pimatic." Does it mean one raspi for each node with pilight - with pimatic “central administration” from one raspi?
Sorry for the late reply, had a busy weekend
What a node should/can do is just alike a Wifi repeater or (extra) accespoint; forward or broadcast 433MHz signals where the other (or first) nodes are out of reach. So it should at least contain a 433MHz transmitter/receiver, and optionally a means to connect to the LAN network. Be it via an ethernet shield or via Wifi (i.e. ESP8266). The uC can be an Arduino/AVR (nano/Uno/micro), ESP8266, RasPi, Onion Omega, PIC, etc.
It is off course also optionally possible to add a few sensors to a node, to be able to measure temperature, humidity, presence (PIR), light intensity. And naturally it should also be possible to put on some relays or other outputs to switch some lights or other devices.
Off course the latter are all optional and depend on your wishes/requirements.I have ordered an extra set of 433MHz RX/TX, I’ll keep you posted if I’m able to setup something soon, It will be ESP8266 based, probably programmed via the Arduino IDE. I saw a few nice projects already featuring a nice webbased interface with possibilities to setup external sensors/actuators. It shouldn’t be hard to include the RFcontrol library I guess.
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@Rene-Arts said:
Sorry for the late reply, had a busy weekend
What a node should/can do is just alike a Wifi repeater or (extra) accespoint; forward or broadcast 433MHz signals where the other (or first) nodes are out of reach. So it should at least contain a 433MHz transmitter/receiver, and optionally a means to connect to the LAN network. Be it via an ethernet shield or via Wifi (i.e. ESP8266). The uC can be an Arduino/AVR (nano/Uno/micro), ESP8266, RasPi, Onion Omega, PIC, etc.It’s already in development if you like to join in: https://github.com/pimatic/homeduino-esp8266-node
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@georg90 Yes I know, I was already following that repo, but still thanks for mentioning it. I also really like https://github.com/Okadesde/esp8266-pimatic-Arduino for its neat web-interface and I plan to include code for receiving P1 smartmeter data. I haven’t yet decided what to take as a starting point, but I don’t fancy reinventing the wheel so that is probably going to be one of these two. I’d love to contribute to projects like these.
I unfortunately don’t have too much spare time with a fulltime job and a masters-thesis to finish (oh wait, there’s a girlfriend as well), but we all have to slack off now and then
I’ll keep you posted!