No. For any setpoint other than 20 degrees.
N is a coefficient for calculating the heat carrier temperature to maintain 20 degrees in the house. For the algorithm to work correctly, you must first select the coefficient N. During testing, set K and T to 0.
Hi, is this the page you are referring to? Sorry for sending them in several photos, but it won’t let me send them together since I’m not an old member.
For me is not correct, because N is for angle of curve to have the same indoor temperature at always outdoor temperature.
With K I move the curve up or down to reach temperature target.
With T I control the speed to reach the target temperature from the indoor temperature.
thanks. It’s strange if modulation is displayed correctly on the web portal. Before looking via mqtt explorer, can you try to remove the device from home assistant, reboot ESP and check again?
Perfect, when I have it I’ll let you know if it worked.
Great!!! It worked. I deleted it from mqtt and when I found it again it works now. Thanks a lot.
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Why not? With K=0 and T=0, the algorithm calculates the heat carrier temperature based only on the outside temperature, just like factory thermostats and boilers do. The offset of the curve is determined by the coefficient K.
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I see that with Ferroli Bluehelix 25 k 50 I have to set Sync max heating temp with target temp. If I don’t check this option the heating temperature don’t go up 51 °C.
This option is enabled by default
Which option is enabled by default? Because after last update I lost it.
Is it possible to read the log file, if I set it to verbose? Is it possible to see it in HA?
How many temperature sensor ds18b20 is it posible to connect?
In my bolier is it possible to read circulator speed, but this is not in rpm but in % some suggestion to put the correct unit?
By default:
struct {
bool dhwSupport = true;
bool coolingSupport = false;
bool summerWinterMode = false;
bool heatingStateToSummerWinterMode = false;
bool ch2AlwaysEnabled = true;
bool heatingToCh2 = false;
bool dhwToCh2 = false;
bool dhwBlocking = false;
bool modulationSyncWithHeating = false;
bool maxTempSyncWithTargetTemp = true;
bool getMinMaxTemp = true;
bool nativeHeatingControl = false;
bool immergasFix = false;
} options;
Yes, via telnet.
No, only via telnet.
The total sensors limit is 20.
Set Purpose to Power in sensor settings
I try but it scrool and I don’t read. How can I read it?
Thanks
The modulation level returned to HA by the OpenTherm thermostat goes up an down by a 2% step.
On the other hand on the heater display the modulation level goes up and down by a a 1% step.
For instance when I get 14% on the heater on HA I read 15% or 13%.
This difference comes from your firmware or is a limit of the boiler OpenTherm interface?
I have a Honeywell CM737 connected to my heating unit (boiler?) and it works perfectly. I would however like to add an esp32 device to read the values it produces. Do you think it’s possible to have 2 control units to the same boiler using the same 2 connectors on the boiler?
Master: The existing unit I have today that controls the boiler.
Slave: The new one, built on ESP32, connected to the same connectors on the boiler and only reading data.
Do you think that would work?
Like this:
I don’t know… Upload a screenshot of System settings from the settings page. Try using Putty to connect to the ESP, port 23.
@lucapretti probably such values were received from the boiler, in the firmware the modulation level is not correcting, if the correction is not enabled in the sensor settings. To verify this, you can look at the logs with log level = verbose
@mrscoville nope, OpenTherm does not allow multiple devices to be connected to a bus.
I don’t know how to use Putty.
Which is the best mode to setting PID parameter? Is better to disactive Equiterm during calibration?
What mode are you talking about?
Of course.
I did get the Diyless master+slave boards to be able to monitor my hybrid heating system. I am able to run and config OTgateway, but I cannot manage to let OTgateway talk with Home Assistant/MQTT.
It would be nice to have instructions on how to config MQTT/HA
Configure MQTT credentials in the MQTT settings section on the Settings page. Required for integration with Home Assistant.
The OTGateway device will be automatically added to Home Assistant if MQTT credentials are correct.