heater

Introduction

Nearly all auxiliary heaters on the market use a serial communication between the control panel and the heater. Our goal was to integrate these communication protocols. There are some major differences between each system. The protocols and the used communication hardware had to be reverse engineered for each heater.

The heaters are controlled by Node-Red directly. Each Heater has is own flow and on top of set is a heatercontroll flow to compine the controllinputs (touchscreen, webinterface, api). The communication setup and routing is done in the Node-Red communications flow.

Autoterm

normal uart 5v ttl with a baudrate of 19200 8N1. Be careful: on the red wire are 12v output for the control panel so only connect tx,rx & gnd. We provide a ready to use cable in our shop.

Supported devices so far:

Autoterm 2d (Tempmode & Powermode)
Autoterm 4d (Tempode & Powermode, the heater do not deliver a lot of status information in the protocol)

Twin Autoterm setup is not supported now, but should not be an big issue.

Websto - W-bus devices

k bus baudrate 2400 8E1 - OBD K-bus cable supported devices:

thermo top v (water heater)

the system activate the heater and set the runtime do 255min (max runtime). The temperature and power is then adjusted by the heater itself. When the water Temperature reaches 90°C the heater will shutdown. So you have to get enough heat out of the circuit to prevent this. The heater has two modes fullload 5KW and partlyload 3.2KW.