You can only have one master device per Modbus.
If both Modbus channels are occupied, there is no other solution.
You can only have one master device per Modbus.
In a year I will get a Ecoforest EcoGeo heat pump. I would like to control it with HA, but let the heat pump control the output temperature itself (like it can do when you add temperature sensors.) Do you know if it is possible to emulate those sensors with the modbus (so I can use any sensor via HA)?
Or would it be sufficient to use the on/off inputs per zone and let the heat pump figure out the temperature without any indoor temperature sensors?
I would probably be able to figure it out by myself if I knew all the modbus registers. But I can’t find any information about them. Where did you get the information about the registers that you used?
I got this list from the importer in The Netherlands.
For reading the unit I use the BMS2 channel which is in read-only mode at this time for monitoring only.
BMSAddress 1 Brine temp. Out R Analog 2 Brine temp. In R Analog 3 Heating temp. Out R Analog 4 Heating temp. In R Analog 5 Compressor suction temperature R Analog 6 Compresor suction pressure R Analog 7 Compressor discharge pressure R Analog 8 DHW temperature R Analog 11 Outdoor temperature R Analog 13 Brine circuit pressure R Analog 14 Heating circuit pressure R Analog 29 Brine temp. Air Unit outlet R Analog 30 COP R Analog 31 PF R Analog 94 Condensation temperature R Analog 132 Superheat R Analog 133 Expansion valve position % R Analog 134 BUS DHW Setpoint R/W Analog 135 BUS Heating DG1 Setpoint R/W Analog 136 BUS Heating SG2 Setpoint R/W Analog 137 BUS Heating SG3 Setpoint R/W Analog 138 BUS Heating SG4 Setpoint R/W Analog 139 BUS Cooling DG1 Setpoint R/W Analog 140 BUS Cooling SG2 Setpoint R/W Analog 141 BUS Cooling SG3 Setpoint R/W Analog 142 BUS Cooling SG4 Setpoint R/W Analog 143 BUS Pool Setpoint R/W Analog 194 Supply temperature SG2 R Analog 195 Supply temperature SG3 R Analog 196 Supply temperature SG4 R Analog 198 Start temperature for DHW R Analog 199 Evaporation temperature R Analog 200 Heating buffer tank temperature R Analog 201 Cooling buffer tank temperature R Analog 202 EER R Analog 203 Compresor discharge temperature R Analog 1 Compressor RPM R Integer 3 Scroll Temp. R Integer 4 Inverter temperature R Integer 79 Working Hours L R Integer 80 Working Hours H R Integer 81 Power consumption R Integer 82 Condensation capacity R Integer 92 CURRENT_HOUR R Integer 93 CURRENT_MINUTE R Integer 94 CURRENT_DAY R Integer 95 CURRENT_MONTH R Integer 96 CURRENT_YEAR R Integer 143 Condensation energy January R Integer 144 Condensation energy February R Integer 145 Condensation energy March R Integer 146 Condensation energy April R Integer 147 Condensation energy may R Integer 148 Condensation energy June R Integer 149 Condensation energy July R Integer 150 Condensation energy August R Integer 151 Condensation energy September R Integer 152 Condensation energy October R Integer 153 Condensation energy November R Integer 154 Condensation energy December R Integer 155 Evaporation energy January R Integer 156 Evaporation energy February R Integer 157 Evaporation energy March R Integer 158 Evaporation energy April R Integer 159 Evaporation energy may R Integer 160 Evaporation energy June R Integer 161 Evaporation energy July R Integer 162 Evaporation energy August R Integer 163 Evaporation energy September R Integer 164 Evaporation energy October R Integer 165 Evaporation energy November R Integer 166 Evaporation energy December R Integer 167 Electrical consumption January R Integer 168 Electrical consumption February R Integer 169 Electrical consumption March R Integer 170 Electrical consumption April R Integer 171 Electrical consumption may R Integer 172 Electrical consumption June R Integer 173 Electrical consumption July R Integer 174 Electrical consumption August R Integer 175 Electrical consumption September R Integer 176 Electrical consumption October R Integer 177 Electrical consumption November R Integer 178 Electrical consumption December R Integer 184 Evaporation capacity R Integer 220 Working program by BUS R/W Integer 221 BUS DHW Demand R/W Integer 222 BUS Pool Demand R/W Integer 223 BUS DG1 Demand R/W Integer 224 BUS SG2 Demand R/W Integer 225 BUS SG3 Demand R/W Integer 226 BUS SG4 Demand R/W Integer 280 Number of Starts L R Integer 281 Number of Starts H R Integer 284 Software version 1 R Integer 285 Software version 2 R Integer 286 Software version 3 R Integer 50 Alarm: 1= No alarm; 0=Active alarm R Boolean 53 on/off control by BUS R/W Boolean 127 Summer R Boolean 128 Winter R Boolean I: Integer -->Register A: Analog--> Register/10 B Boolean -->Coil Data types Integer BMS address+5001 (Protocol: MB Extended)
I use on/off control for heating and cooling. Stepped off from the TH Therm units because this limited me to one sensor per group on the heatpump.
With on/off control I can control a group to turn on independently on a zone that requests heat or cool.
Do you mean th-tune? And if so, do you have any information about the modbus registers of that device?
And how does the heat pump determine the output temperature when you use on/off, only the outside temperature?
As mentioned I am using only on/off for heating and cooling.
The water temperature is determined by the outside temperature.
TH-tune is the right name. I removed this way of control because it is an expensive device with limitations for the way I wanted to control the zones.
Will have an Ecoforest 5-22 KW water heatpump installed after summer. The installer is recommending an expensive thermostat from which I think will be the Th-Tune…
Could you please confirm the logic below for controlling this:
Reading the installation manual I think I can just use input signals for heating/cooling through the J4 connector. Is that how you did it?
The manifold will have 1 actuator per valve which are controlled via home assistant via room-thermostats. When one of the thermostats deviates x value from target the actuator valve is opened and a signal is given through the J4 port to switch on the heat pump?
I am not sure what you mean with J4 (too long time ago and not having the manual around)
I ditched the expensive TH Tune and replaced it with a zonecontroller that measures temperature and humidity per room.
Inputs for heat and cool are respectively:
Group Heat Cool DG1 DI5 DI6 SG2 DI7 DI8 SG3 DI9 DI10 SG4 DI11 DI12
These inputs are simple on/off channels. There is a 24 volt and a input. If you connect these together, the group will be active then. Heat goes before cooling and hot water request is always overruling.
I am using SG3 and SG4 for 2 different groups (2 buildings)
My zonecontroller measures every room independently. If there is heat or cool request, the zone opens and after one minute the SG3 or SG4 group will be enabled for heating or cooling.
Which zone controller do you use @NielsS? When using Google I only find two mentions of the word zonecontroller in the manually. But can’t find any related device.
I have looked at Tech and Honeywell and both did not meet my expectations.
Integrating in HA was not possible at that time or was a too expensive system.
So I built one on a ESP32 to have a 8 channel heat and cool zone controller with temperature and humidity sensors. This unit can run standalone with a built in webserver and also connects with a REST-API interface and MQTT.
@NielsS would you mind sharing detailed info about this?
I am new to HA, but are looking for an alternative to the thTouch. I’m looking for two options, that I cannot get to work:
- anticipating low and high electricity prices (APX, using tibber)
- setting a slightly lower night temp (‘nacht verlaging’)
Any help how to do this through HA sould be very much appreciated! Can it be done with a Protoss PE11 or is more needed?
I have an ecogeo c3-12kw. My idea is to use this integration to monitorize the machine and also to fully shutdown/power on when I go holidays. Is it possible with this?. @NielsS pointed this should be read only, but at the same time he talks about he uses it to off certain groups. Also the addresses from the first list and the one he received from Netherland importer are different. I know, I didn’t understand anything
For the BMS adresses, just add 5001 to the number it has in the list. Example: if the list shows 2 as adress, the true address is 5002 (to make it difficult). Maybe they have changed the list to the true address for conventience. (also I have an older model that was released in 2018 and this have an older firmware/controller)
If you enable the full control by BMS, be aware that all the control needs to be via the BMS port. For example: cooling and heating per channel is then demanded via modbus only. External inputs for heat, cool, dhw and other controls do not work.
This is a personally designed pcb with dito software.
It is not yet publicly released due to some small issues in the pcb design.
Is there any way that I can power off/power on it remotely and in a safer way? Without disconnecting power meanwhile the compressor running.
There are external inputs which prohibit turning on the compressor. You can use these inputs for this feature.
The installation manual has these inputs described.
Thanks for your feedback and all the information provided in this thread. Really appreciated.
My concern with this is it’s not very “clean way”, I mean, inhibit powering the compressor sounds too messy and probably associated to rise other alarms in the systems. It’s also true that it doesn’t appear mapped in your list any address to power on/off the machine… so wouldn’t be a possibility although at anytime write would be enabled in the future.
By the way, how do you go with enabling write mode with BMS?.
The external controls inputs are part of the internal control unit. Using these inputs does not break the compressor.
The list of inputs:
|Control of electrical consumption (EVU)||Digital input||Voltage-free (0V)||DI1|
|WINTER / SUMMER program selection||Digital input||Voltage-free (0V)||DI2|
|Enable / disable DHW production||Digital input||Voltage-free (0V)||DI3|
|Pool production||Digital input||Voltage-free (0V)||DI4|
I did not enable the BMS external control due to limitations. The heatpump does not respond to other external thermostats when BMS external control is enabled.
Wow. This part "“heatpump does not respond to other external thermostats when BMS external control is enabled” has put me off from integrating my EcoGeo heatpump.
Anyhow, I may try monitoring just to play around with modbus on esphome, has anyone tried this instead of fancy hardware converters?