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2720 posts

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Topic # 242369 24-Oct-2018 21:11
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Hi

 

Been doing a lot of home automation stuff around the house.

 

Currently my heat pump uses the following to interact with my home hub.

 

Broadlink RM Mini3 IR Blaster

 

Xiaomi door sensor - to sense whether the heat pump is on or off (via the vent opening)

 

Home automation via home assistant integrating the above with some automations to check the heat pump received the on / off signal and resend if it fails etc.

 

 

 

I know a few people are interfacing the mitsi heat pumps via a serial interface and a pi or esp8266 or similar.  Is anyone doing this with a panasonic heat pump.  I'd much prefer to control it via the serial interface.





HTPC: Intel i3-2100 / 12GB RAM / AMD HD7750 / 480 GB SSD / 58TB Storage / MediaPortal / MadVR / Win10
AVR: Pioneer Elite SC-LX87 220W 9.2 Ch AVR
Speakers: Wharfedale Jade 7 Fronts / Jade 2c Center / Jade 5 Rears
Subs: iNuke 3000dsp 3000W proamp with 4x 15" JBL Sealed Subs
Display: Samsung 60" UA60H6400 LCD TV
Accessories: Gefen HDMI Detective with splitter


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196 posts

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  Reply # 2113533 24-Oct-2018 22:38
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Interesting - Does your Panasonic Heat Pump have a standard RS232 serial port with a published command API?

 

I have a Panasonic 3D Projector which has a rear RS232 port and the commands are published in the operators manual.

 

I recently built myself an ESP8266 Wifi controllable RS232 port where the projector is now controlled by Wifi http commands that are converted into true RS232 commands.

 

Building the circuit board and writing the code for a Wifi controllable RS232 port is not quick job but can be done quite cheaply if you have the skills.

 

 


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Ultimate Geek
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  Reply # 2113554 24-Oct-2018 23:46
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datahawk:

 

Interesting - Does your Panasonic Heat Pump have a standard RS232 serial port with a published command API?

 

I have a Panasonic 3D Projector which has a rear RS232 port and the commands are published in the operators manual.

 

I recently built myself an ESP8266 Wifi controllable RS232 port where the projector is now controlled by Wifi http commands that are converted into true RS232 commands.

 

Building the circuit board and writing the code for a Wifi controllable RS232 port is not quick job but can be done quite cheaply if you have the skills.

 

Not wanting to take this off topic but wondering if you used any specific packages or firmware on your ESP8266 for your wifi > RS232? Or coded from scratch?

 

 

 

To the original post - I don't know for Panasonic but for Daikin I bought an additional Daikin box which connected internally to S21 (serial?) and gives wifi control. Their app is a bit naff but can be used over http - and works with Home Assistant.


 
 
 
 


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Master Geek
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  Reply # 2113565 25-Oct-2018 06:24
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I also have a couple of Panasonic heat pumps and was awaiting the Broadlink to arrive so that I could start communicating with them via Home Assistant. Interesting to hear the measures you have to take to check its status etc. Keen to hear if anyone else has had success with controlling or interfacing with Panasonic Heatpumps. Happy to chip in/sponsor a portion of the coding venture if someone has the skills or know how to build something like this.


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  Reply # 2113645 25-Oct-2018 10:19
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phrozenpenguin:

 

Not wanting to take this off topic but wondering if you used any specific packages or firmware on your ESP8266 for your wifi > RS232? Or coded from scratch?

 

 

I build a lot of ESP8266 devices and prefer to write all of my code, mostly Arduino based, for them where possible.

 

The code required for the ESP8266 Wifi-RS232 devices took a while to perfect with a lot of trial and error but I now have several of these Wifi-RS232 ports driving RS232 SMS Modems 24/7 in my office.

 

(I built these units to do away with having to use serial cables connected to a specific computer to control modems. Now most RS232 serial devices can be controlled by any server or workstation on the network just by sending http commands to their specific IP addresses.)

 

Regarding this topic - I am interested to know if anyone's heat pumps, (Panasonic, Mitsubishi or other) have serial ports hidden away and if anyone has a published specification of the commands?

 

I have 5 x Mitsubishi units (A large 4-Split unit and another single unit) that do have some sort of serial connector somewhere but I have yet to find any specification of how these operate. These pumps are all currently controlled with IR signals and some are again driven with custom built Wifi ESP8266 IR Sender units.


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Master Geek
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  Reply # 2113649 25-Oct-2018 10:24
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I will definitely have a look when I get home. I'm very curious to know if there is a service port.

 

I'd be keen to use one of my Particle Photons for this as they're tiny and would be perfect.




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  Reply # 2113653 25-Oct-2018 10:28
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Regarding serial control and mitsibishi.

https://nicegear.nz/blog/hacking-a-mitsubishi-heat-pump-air-conditioner/

And Google cn105 heat pump for some more results.

Not much information on Panasonic.




HTPC: Intel i3-2100 / 12GB RAM / AMD HD7750 / 480 GB SSD / 58TB Storage / MediaPortal / MadVR / Win10
AVR: Pioneer Elite SC-LX87 220W 9.2 Ch AVR
Speakers: Wharfedale Jade 7 Fronts / Jade 2c Center / Jade 5 Rears
Subs: iNuke 3000dsp 3000W proamp with 4x 15" JBL Sealed Subs
Display: Samsung 60" UA60H6400 LCD TV
Accessories: Gefen HDMI Detective with splitter


196 posts

Master Geek
+1 received by user: 11

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  Reply # 2113657 25-Oct-2018 10:33
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kiwijunglist: Regarding serial control and mitsibishi.

https://nicegear.nz/blog/hacking-a-mitsubishi-heat-pump-air-conditioner/

And Google cn105 heat pump for some more results.

Not much information on Panasonic.

 

Nice Find! - I'll be investigating those interfaces - Thanks.




2720 posts

Uber Geek
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  Reply # 2113672 25-Oct-2018 10:38
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Your WiFi serial interface sounds good.

Might be able to have someone hack/probe my Panasonic heat pump remotely as it's probably beyond my ability




HTPC: Intel i3-2100 / 12GB RAM / AMD HD7750 / 480 GB SSD / 58TB Storage / MediaPortal / MadVR / Win10
AVR: Pioneer Elite SC-LX87 220W 9.2 Ch AVR
Speakers: Wharfedale Jade 7 Fronts / Jade 2c Center / Jade 5 Rears
Subs: iNuke 3000dsp 3000W proamp with 4x 15" JBL Sealed Subs
Display: Samsung 60" UA60H6400 LCD TV
Accessories: Gefen HDMI Detective with splitter


196 posts

Master Geek
+1 received by user: 11

Lifetime subscriber

  Reply # 2113750 25-Oct-2018 12:11
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kiwijunglist: Your WiFi serial interface sounds good.

Might be able to have someone hack/probe my Panasonic heat pump remotely as it's probably beyond my ability

 

You could be lucky with your Panasonic A/C if it's a relatively recent model. Finding the interface connection and command specs will be the main problem.

 

Sadly, after some study (thanks to your very useful links), all of my Mitsubishi units are MSZ-FA 2006 models and they don't have the CN105 serial interface connector on board so I'm stuck with IR control only.

 

However, IR is not an issue because they have been automated that way for many years already with custom built temperature sensors integrated into my home/office automation systems that start, stop and set A/C units as required with 'learned' IR command strings.

 

It would have been nice to get settings feed back from a serial port.

 

(I run a Linux server 24/7 which is the central controller for most of my sensors and office/home/workshop automated systems.)

 

Best of luck with your quest.

 

Edit: Typos


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