OK, issue reported: https://github.com/NodeBB/nodebb-theme-persona/issues/244

@Dwalt But if the idea is to run some actuator (like relay) on it, it must be on all the time.

8 MHz Arduinos absolutely need to use lower baud rate than 115200. The baud rate is generated from the internal clock, and at 8 MHz 38400 bps is the highest baud rate close enough to the standard.

Nice to see that my little HeatpumpIR library made it all the way here

I'm also quite new to MySensors, I actually just started today, I've had all the necessary hardware on my table for some weeks now... My goal is to power a (physically) small MySensors device directly from the Panasonic heatpump, and hide everything within the indoor unit's covers, and have it fully controlled by Domoticz. There's quite a bit of work to do, as for example Domoticz does not have a suitable devuce type yet.

And how about MySensors, I'm still quite a newbie on the messaging schema... Is there a schema which could be used to communicate all of these within the same message:

• ON/OFF information (0 or 1)
• Temperature information (integer from 8 to 30)
• Fan speed information (integer from 0 to 5)
• Mode information (COOL, HEAT etc. i.e. integer from 0 to 6)

What comes to Daikin, it would probably be quite easy to add it into the HeatpumpIR code, provided that I could borrow the remote controller for a while. Or, if somebody else could decode the protocol.

You need to connect it using a 3.3V USB to serial adapter.

Something like this: http://www.ebay.com/itm/3-3V-USB-to-TTL-Serial-Cable-FT232-Chipset-FTDI-USB-Cable-Adapter-Computer-Cable-/181870867906

Interesting... I took a look at mharizanov's work, and I think I might have a decoder for the protocol here: https://github.com/ToniA/Raw-IR-decoder-for-Arduino

Would you try if this correctly decodes the protocol? I would also appreciate some full outputs of successful decode, together with the explanation of the state the remote control shows after the button press.

If the decoder is correct, creating a Daikin module for the HeatpumpIR library will be a piece of cake

Really interesting, maybe I could build something cool around the Arduino HeatpumpIR (https://github.com/ToniA/arduino-heatpumpir) library I've been building. Right now I'm integrating it with Domoticz (http://www.domoticz.com/forum/viewtopic.php?f=34&t=7179#p69647).

I'm an ex-Microsoft employee from Finland (resigned about a month ago).

@riataman, have you looked at this: https://github.com/mysensors/Arduino/tree/development/libraries/MySensors/examples/HeatpumpIRController, it's based on the HeatpumpIR library I've written? I just added a few new heatpump models yesterday and today into the library...

Anyway, in my project I'm currently using Arduino Nano + NRF24. I placed this inside the indoor unit's covers, IR led next to the IR eye of the unit, and I even stole the power from the air conditioner, as its logic is running on +5V, which is conveniently the same as the operating voltage of the Nano Of course I can't recommend anybody to do that

I just got some Sensebenders this week, so I'm trying to build a way smaller device for the other A/C unit I have.

Just got my Sensebenders this week. I can confirm that the HeatpumpIR library works also on the Sensebender Nice...

This is what I'm using as the control interface: http://www.domoticz.com/forum/viewtopic.php?f=34&t=7179#p69647

It's still under work, but I should be able to have events running on Domoticz, like turn on the A/C if it gets too hot inside the house etc.

Take a look at this topic on the Domoticz forum: http://www.domoticz.com/forum/viewtopic.php?f=34&t=8751

Also the stock bootloader is broken so that in reboot, it sets the watchdog timer to a very small value (so that a reboot would happen before the sketch has done 'setup()'), but does not turn off the watchdog it it was enabled in the sketch -> eternal reset loop if you ever reboot from a watchdog-enabled sketch.

Optiboot, MYSBootLoader etc. would work fine.

For whatever strange reason, the Arduino stock bootloader is broken, so that it will not disable the watchdog on startup, causing just an infinite reset loop. I'd recommend updating the bootloader with something like MYSBootloader or Optiboot.

This is what I have done as a hobby so far: https://www.openhardware.io/view/41/Heatpump-airconditioner-controller

There's no Gree support in the HeatpumpIR library, though.

@dpressle said:

@ToniA can you elaborate?

Yes, on my AC IR decoder sketch I have decoder modules for different heatpumps. Like this:

https://github.com/ToniA/Raw-IR-decoder-for-Arduino/blob/master/MitsubishiElectric.cpp

So, write a new one, and add a call to it into https://github.com/ToniA/Raw-IR-decoder-for-Arduino/blob/master/rawirdecode.ino#L315. First you need to write a condition to recognize the protocol (like, from the first bytes + length etc). Then just start adding functionality, like decoding the temperature, then operating mode etc.

How about writing a new decode module into Raw-IR-decoder-for-Arduino? I find it very useful in trying to figure out how a certain A/C protocol works.

Would these help:

https://github.com/ToniA/arduino-heatpumpir
https://github.com/ToniA/Raw-IR-decoder-for-Arduino

The experience I have is from running the serial gateway on Sensebender (which is a 8MHz device, running on 3.3V). It just didn't work at all, and as soon as changed the serial speed to 38400 everything was just fine.

http://wormfood.net/avrbaudcalc.php?bitrate=300%2C600%2C1200%2C2400%2C4800%2C9600%2C14.4k%2C19.2k%2C28.8k%2C38.4k%2C57.6k%2C76.8k%2C115.2k%2C230.4k%2C250k%2C.5m%2C1m&clock=8&databits=8

It also doesn't matter whether you connect through USB or RS-232, it's still the same problem. Another 'nice' finding was that Arduino Nano has a hardware problem, it's not discovered as a USB device when Raspberry boots up. I had really interesting times when trying to use it as the serial gateway, works fine when plugged in when Raspberry is running, but it's lost on every boot.

https://ketturi.kapsi.fi/2014/04/how-to-fix-moody-arduino-nano/

It's the /dev/ttyAMA0. See this: https://www.raspberrypi.org/forums/viewtopic.php?p=139945

Domoticz runs as root (which is a really bad thing IMHO), so it has no problems with this.

I've done the same with SenseBender, so it should work with Pro as well. You only need 4 wires, GND, Vcc, RX, TX.

If it's a 3.3V model, it runs on 8 MHz, so you need to set the serial speed to 38400. At 115200 the serial speed is too much off to work reliably.