Tiemme technical manual in Italian for the NG21 board.
The smoke fan speed can be set by Volt or r.p.m. If you choose Volt, the display will show Vol, and if you select r.p.m, it will show r.p.m, the same as in 30025.
To find the water pump status and airflow data points on your stove and setup, see my post 181 from May 2023, which shows what I did to find them on my test. you also needs a dattalogger for instance Leoshusar dattalogger
Hallo everybody, I have a normal esp32board (esp32dev)
I cannot have this project working. I donât know if it is my board, the small ttl to rs232 module or the configuration. Dos somebody have the same espboard and can share the configuraion with me? Thanks
I accidentally found at first try that I can get it at J40016 where there are binary sensors from outputs. 0 is off, 1 is on. This is on KEPO stove. Might be also other positions of the J40016 mean some outputs.
- id: water_pump_state
platform: fourheat
name: Water pump
datapoint: J40016
parser: return data[data.size() - 8] == '1';
I wonder that my stove might not have an air flow meter, because there is no reading nowhere on the display unit. Thanks for the advice tho! 
Can you please post your Yaml File? Thanks
@ebagnoli
I donât think thereâs a universal yaml, but you have to customize it for your stove/board, and the datapoints you can use are those you can see on the display.
For instance, the Leoshusar datapoint has airflow, not rpm, while the Kellerman datapoint has rpm, not airflow.
Also, very important parameters like the set room temperature: on some boards itâs 20493 and on others itâs 21700, while on others the boiler target temperature is 20180 and on others itâs 20199
Edit
An example of the latter in Spanish
I couldnât send you a PM, so Iâm gonna reply here in English.
Pretty much everything is explained here. Also the fact that 4heat integration is a crap for 200⏠and only useful to find the datapoints for specific stove.
About the devices, I use one ESP32 relayboard at the stove end, like this:
The other part is my indoor thermostat on another ESP32 which uses AHT20 for temperature input, this toggles the other ESP32. I use HTTP GET requests for toggling the other ESP32 (so it works even without HA) and a simple thermostat configuration.
I used @catdogmaus yaml file, pretty much every datapoint is found here in this topic, except for the Pump status, which I luckily found myself.
Hi All,
I recently bought and installed a Teba TP30-F. Now Iâm trying to get the stove connected to HomeAssistant using ESPHome. Some things are working, some arenât. Not all the datapoints seem to match my stove. I Can anyone help me?
Attached is also a photo of the motherboard; I suspect itâs a Tiemme MB100.
This is a great manual and can be used to understand all the parameters on the board. Also NG01, MB250 and SY250 manuals can be used to understand things. But is there available the specific manual for the NG21 (non-AIR) version?
I have the MB100 manual and found some information there.
After reading this forum and another one about the 4Heat app, I discovered that the âpowerâ is in register âB20816â instead of âB20364.â
Now Iâm still looking for the correct data point for the water pressure sensor; âJ30020â doesnât work for me.
20119: remaining time for cleaning (hour)
20225: puffer target
Regards,
Franco
I donât have the NG21 hydro manual, but if you like the wiring diagram,
I think the board most similar to the NG21 is the MB100 Hydro, which can use the remote control with a display, but the NB100 has two firmware versions: one for use with the radio control display and one without as Ng21.
MB100 Hydro Manual in edit 7 my post 229
To use the manual, you need the password. If you donât have it, send the datapoint:
A20182000000000000
The board responds with
B2018200000000VXYZ
VXYZ is the password
Hello, good afternoon. Iâm trying to integrate my Dielle hydrostove. After several attempts, I managed to add the integration.
Unfortunately, once installed, when I configure it, the following error appears in the log.
Registrador: homeassistant.config_entries
Fuente: config_entries.py:749
OcurriĂł por primera vez: 14:30:23 (1 ocurrencia)
Ăltima vez registrado: 14:30:23
Traceback (most recent call last):
File â/usr/src/homeassistant/homeassistant/config_entries.pyâ, line 749, in __async_setup_with_context
result = await component.async_setup_entry(hass, self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File â/config/custom_components/4heat/init.pyâ, line 100, in async_setup_entry
hass.config_entries.async_forward_entry_setup(entry, âsensorâ)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: âConfigEntriesâ object has no attribute âasync_forward_entry_setupâ. Did you mean: âasync_forward_entry_setupsâ?
ÂżCan you help me?
I have homeasistatn 16
Supervisor 2025.08.3
Core 2025.8.3
I wanted to know the datapoints that work for my stove and setup. To solve this, made a procedure my post 186, final result is the Excel file.
The hardware is the same as for the esphome integration plus a datalogger.
The software is one I made using the Arduino IDE and dattalogger. For instance you can use leoshussar dattalogger (post 207) without the TTL-RS232 converter.
In your case, if you run the program first on Power 2 with the stove off, youâll see a datapoint ending in 2 and the water pressure. If you run it again on Power 5, youâll see a datapoint ending in 5 and another ending with the new water pressure value.
These are the datapoints you are looking for.
Hi all,
Iâm connected to a Tiemme SY400 controller via RS-232 (RJ11) and I can read values from the stove and puffer successfully.
Transport/frame Iâm using (serial 9600 8N1):
0x08 + <18-char ASCII CMD> + \r
I<DP>000000000000 â response J<DP>⌠(or B<DP>âŚ)I30001000000000000I30002000000000000I30017000000000000I30018000000000000, I30019000000000000A<DP>000000000000 â response B<DP>âŚWhen I set the target to 69°C on the display, these datapoints reflect the change (mirrors/slots; some are Ă100):
DP 20128 = 69
DP 20384 = 6900
DP 20640 = 69
DP 20896 = 69
DP 21152 = 6900
DP 21408 = 6900
DP 21664 = 69
DP 21920 = 6900
DP 30128 = 69
DP 30384 = 6900
DP 50128 = 6900
(So there are multiple mirrors at +256 offsets and also a 50xxx bank that looks like valueĂ100.)
B<DP><12-digit right-justified payload> (e.g., 69 â ...000000000069, 690 â ...000000000690, 6900 â ...000000006900)A<DP>⌠right after the write, and I also watch all the mirrors for a few seconds.Result:
A20128âŚ69) after B20128âŚ69, but the actual value quickly reverts to the previous target (73 in my case), and the mirrors remain at 73.If anyone has a confirmed write example for SY400 (the exact Bxxxxx⌠that persists and the corresponding Axxxxx⌠readback that shows the new value) Iâd really appreciate it.
Thanks!
******** UPDATE *******
now I can read and write the stove setpoint and its min/max range reliably.
write
TX: B20076000000000069
RX: A20076000000000069
After updating esphome from 2025.5.0 to 2025.9.0 it no longer works and I can no longer see the sensors.
HELPME
Good morning, I wanted to share my misadventure with you. I have a boiler with an NG21 board. For the configuration, I used the catdogmaus yaml file and the hardware was a D1 Mini and an RS232-TTL converter. Once connected, everything worked right away, but only for a day. After that, the RS232 port on the NG21 board went offline. The boiler board port burned out. Now Iâm forced to replace the entire boiler board. I donât understand what I did wrong. Could you please explain my error? Hereâs the diagram of my configuration. Thanks for your help
Hard to tell, I would say there are 2 possible options.
In your diagram there is data not from TTL to RS232 but to rj11 socket. rj11 should actually connect NG21 board to RS232 outside. I personally would not trust that this manufacturers rj11 wiring follows any standard. RS232, if present should however be standardized. We use for connection only rx, tx and GND. However in RS232 side also vcc is present! Error here could end badly.
However, considering that it actually worked, I would lean to faulty board. I have never used that particular board so it is impossible to say for sure.
Both versions are plausible.
