This is the forum archive of Homey. For more information about Homey, visit the Official Homey website.
The Homey Community has been moved to https://community.athom.com.
This forum is now read-only for archive purposes.
The Homey Community has been moved to https://community.athom.com.
This forum is now read-only for archive purposes.
Comments
https://gathering.tweakers.net/forum/list_messages/1690945
If have asked for help there in the hope that they can provide the info to fill in the signal specifications homey needs to send and receive the itho signals .
So I really hope we can get some help there. The signal specification really is it my field of expertise . Writing an app is reasonably easy, but interpreting the data that they provided and getting the info needed for homey is not doable for me.
You need a special one. But please correct me if I'm wrong.
And if so, i don't now if homey has the correct one.
unit to control it with domotica/homey/zwave. Or Have an idea to control it?
What kind of article number does your RFT transmitter (see attached documents) have? If I am correct, there are at least 2 protocol versions and the software only supports the newer version.
An older version (used from 2003 - 2012)
Itho CVE Eco Fan series
Infineon TDK5110 ASK/FSK Transmitter 868/433 MHz
Carrier frequency: 868.260Mhz
data rate 8000bps
Modulation: FSK?
Newer version (used from 2011 - present)
Itho CVE ECO RFT series
Atmel MEGA 169PV microcontroller and a standard Texas Instruments CC1150 chip for RF
Carrier frequency: 868,299865 MHz
BaudRate: 4004,47845458984375
Modulation: 2-FSK
MANCHESTER_EN = Disable
Deviation of 25,390625 KHz
By the way: At the bottom of this https://developers.athom.com/library/signals/rf/ page it says the mentioned receiver configuration cannot be changed by a developer so this may be a futile excercise.
868 MHz configuration
kludon,
The Brink Renovent Excellent wtw is able to use Opentherm communication according to its manual. Parhaps you can experiment with an Opentherm Gateway http://otgw.tclcode.com/?
the start of the project can be found here: https://github.com/robertraaijmakers/nl.ithodaalderop
I still think it can be done since the Homey is using the same chip as the projects found on the internet. So the cop is capable. If the Homey API is I still have to find out. But saw that there is now also a HoemEasy app in the tire. So will see if there are some useful tips and tricks in there.
http://www.orcon.nl/wp-content/uploads/files/gebruiker_montage_handleiding_co2-bedieningssensor-15rf.pdf
Long story for those interested in a little project...
While it would be great (and the ultimate goal) to get Homey to control the Itho directly, the nodemcu (a small Arduino variant with WIFI) + CC01 RF chip combination described at https://www.maredana.nl/itho-mechanical-ventilation-with-esp8266/ works really well. The hardware can be bought for ~8 euro's on Ebay. The most difficult bit is to wait for the cheap components to arrive from China (free shipping, but it takes a month...
As mentioned above the nodemcu comes with a WIFI chip. After connecting (soldering) the C1101 RF transmitter chip and uploading the software through the Arduino IDE you can connect the unit to a USB power supply anywhere and control it through WIFI via a builtin webserver (see screenshot below).
The software includes support for a temperature / humidity sensor (another ~5 euro's or so, available in most electronic stores), so you can use it for instance to control the humidity in the bathroom by switching the Itho fan to 'high' when the humidity reaches a certain threshold (which is what I use it for). It can also receive RF commands sent by other Itho remotes in order to track the state of the Itho fan.
The author has made a neat web interface for controlling the Itho Fan, see below. I have the modified the code to update Homey with the temperature, humidity and state of the fan through http POST messages using the HTTP request flow cards and better logic app. The better logic app tracks the value of the temperature and humidity variables, resulting in nice graphs (see below, the green line is humidity, the darker line is the temperature). Homey can control the Itho unit through HTTP GET requests.
In the meantime I am planning to put together a second unit to experiment a bit with the RF to see if I can help figure out how to get Homey to control the Itho. I wouldn't hold my breath though... ;-)
api('POST', '/manager/microcontroller/record', { frequency: '868' }, console.log)Based on http://www.progz.nl/blog/index.php/2015/01/reverse-engineering-remote-itho-cve-eco-rft-part-3/ I think the 'words' in the 'signals' definition in app.json should be 254 (0) and 255 (1), corresponding to 0b 1111 1111 1111 1110 and 0b 1111 1111 1111 1111.
Right now I am only getting data when I press a button on the remote many 4-5 times in rapid succession, and the data doesn't make a lot of sense yet, but it's a start I guess...
Homey can send FSK and receive FSK two seconds after sending. In an upcoming release the possibility to enable Homey to receive FSK signals and display them on the console will be added. When that's the case I will probably have another look at the app.
Note that this also means that it will not be possible to have Homey track that state of the ventilator by receiving the signals when using the remote. Not a big deal, but it's nice that the Itho Wifi remote can do this.
BTW, I have published the Homey version of the Itho Wifi remote on github: https://github.com/abaretta/Itho-WIFI-remote-Homey.
I'm complete noob don't know where to start.
Or maybe you can sell a complete device to me
The best starting point is the following link which describes the process:
https://www.maredana.nl/itho-mechanical-ventilation-with-esp8266/
Instead of using the Arduino sketch linked from that page you can use the one I created for use in combination with Homey: https://github.com/abaretta/Itho-WIFI-remote-Homey.
About the hardware, you need to order a NodeMCU, preferrably a development version which is a bit bigger (but still quite small) and which has easily accessible pins. They are only 3-4 euro's, so I would buy a couple in case something breaks, you can always build another temp/humidity/whatever sensor with it ;-)
You also need the C1101 RF chip. Make sure you get the 868 MHz version. For instance: http://www.ebay.nl/itm/2PCS-CC1101-wireless-module-Long-Distance-Transmission-Antenna-868MHZ-/172009556160?hash=item280c9188c0 (2 pc for USD 6.16).
I bought both at Ebay from http://stores.ebay.nl/satisfyelectronics/.
I also have good experiences with banggood.com, see https://www.banggood.com/search/nodemcu.html, however they don't appear to have the CC1101 at the moment. I did buy a small enclosure for the unit there: https://www.banggood.com/search/948279.html (I think the smallest, not 100% sure).
You will need a small breadboard for the NodeMCU, and some wires with connectors to connect to the NodeMCU pins (all items can be bought in the eBay store above). I soldered the wires to the CC1101 chip, but used connectors to connect them to the NodeMCU. A glue gun will come in handy as well, I glued the CC1101 straight to the NodeMCU and used it to to support the antenna as well.
I bought the temperature/humidity sensor 'ready made' with a cable and a small enclosure around the sensor, it was actually the most expensive part. I bought it in a Dutch electronics webshop, can't remember which one.
...
Once you have the hardware, follow the instructions to connect the CC1101 to the NodeMCU. I found the trickiest bit to solder the antenna to the CC1101, the chips I received only had a very small area to attach the antenna (and other wires) to. My version looked like this:
Next connect the unit to a PC via USB so you can load the Arduino sketch. You need to edit the sketch to include the credentials for your wireless network as well as the Homey bearer token (assuming you want to upload humidity/temperature data to Homey ;-)
Once done (hardware assembled and Arduino sketch loaded), you will need to power off the Itho unit (pull the plug ;-) ), and after powering it back on start the NodeMCU. If the Itho goes to full power mode you are done. You can now control it via the web interface and via Homey.
I trimmed the breadboard and crammed everything in the plastic enclosure (see picture in previous post), it looks nice with just the USB cable and the cable for the sensor sticking out.
It works great, one nice detail is that it also receives the signals sent by Itho remotes, so it can update Homey with the actual state. An eventual Homey app will not be able to do this, as it can only listen for Itho signals 2 seconds after sending.
I hope it is the right one
I saw the temperature sensor on your photo, I guess it is this one
https://www.kiwi-electronics.nl/AM2302-bedrade-DHT22-temperatuur-vochtigheidssensor?gclid=CjwKEAjwsLTJBRCvibaW9bGLtUESJAC4wKw14jNVLu7B0DBOgDpcWrkUTi_4AFqECI0bw4oVHjX1tRoC1nbw_wcB
But didn't order that one. I saw that someone working on Xiaomi sensors and want that one in de bathroom so that I can place the NodeMCU can be placed on a safer place.
I have never build some thing like this so I hope it's all gonna work.
Thanks for your post.
And yes, that's the one! A bit ridiculous to think that the simple sensor is 4 times as expensive as the entire NodeMCU. I didn't want to wait for another shipment from China, and liked the finished product. I only put some heat-shrink tubing around the leads of the sensor. DHT22 sensors can be found much cheaper, but then you need to do something to make it more rugged/presentable.
@Athom should make an app for it, mostly because the needed information to make an app is available (see all the links to Git). It's not like a Tweakers app would add more to homey
It is not clear when this functionality will be released. Possibly it will be made available as part of the developer tools (at some point).