Older type of Panasonic Aquarea heat pump with ESPHome
Hello,
I would like to monitor and control my heat pump using Home Assistant.
I have read a lot of titles about Heishamon, which uses a free connector on the heat pump motherboard or connects between the motherboard and the internet converter.
Unfortunately, my heat pump is an older type, the WH-SXF12D9E8 series, and in this series the internet converter connects between the motherboard and the display controller.
So far I have built (before I run out of materials) such a converter that contains 2 boards with a UART to RS 485 converter (which are connected between the motherboard and the display controller), and a TTL to RS 485 converter (with manual control of transmission / reception) so that I can at least clear some data from the communication between the motherboard and the display controller.
I have an unused ESP32-S3 at home so I could try to program the Heishamon software into it but I couldn’t find a schematic that is labeled as a “big board” (there are 2 relays on it) so I would know which pins are used for what.
So please help with this project.
Thank you in advance and sorry for the translation.