Panasonic H Series Aquarea air-water heat pump protocol

Eine deutschsprachige README_DE.md findest du hier.
Een nederlandse vertaling README_NL.md vind je hier.

Help on translation to other languages are welcome.

Current releases

Current beta release is version 0.2b. The compiled binary can be installed on a Wemos D1 mini. Or download the code compile it yourself (see required libraries below).

Connection details:

CN-CNT TTL UART 9600,8,E,1
Pin-out (from top to bottom)
1 - +5V (250mA)
2 - 0-5V TX
3 - 0-5 RX
4 - +12V (250mA)
5 - GND

Where to get connectors

RS-Online orders

Conrad orders

Use some 24 AWG shielded 4-conductors cable.

How to connect

Currently the PCB's are in (beta) production. We suggest to wait a while for them to be tested.
Soon you will be cable to order one of the PCB design directly from the project owners but ofcourse
we will share the schematics also. For now these are some schematics we are testing or have tested.
PCD Designs from the project members
Picture Wemos D1 beta

Using the test arduino image

The current arduino test image is able to read from the Panasonic Aquarea H-series CN-CNT connector.
You need to build this image with support for a filesystem on the esp8266 so select the correct flash option in arduino ide for that.
When starting for the first time a open-wifi-hotspot will be visible allowing you to config your wifi network and your mqtt server.
If you ever want to factory reset, just double reset the esp8266 within 0.1 second. It will then format the filesystem and remove the wifi setting and start the wifi hotspot again.
After configuring and booting the image will be able to read and talk to your heatpump. The GPIO13/GPIO15 connection will be used for communications so you can keep your computer/uploader connected to the board if you want.
Serial 1 (GPIO2) can be used to connect another serial line (GND and TX from the board only) to read some debugging data.

Building the test arduino image

boards:
esp8266 by esp8266 community version 2.6.3 Arduino

libs we use

MQTT topics

Current list of documented MQTT topics can be found here

Protocol info packet:

To get information from heat pump, "magic" packet should be send to CN-CNT:

71 6c 01 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 12

Protocol byte decrypt info:

Current list of documented bytes decrypted can be found here

Integration Examples for Opensource automation systems

Openhab2

Home Assistant

ManfredHerrmann / HeishaMon