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Internet module ecoNet 300 and ecoLINK2

jamrjan 184752 679
Best answers

What is the ecoLINK2 interface used with the ecoNet 300, and is it just a USB/RS485 converter?

ecoLINK2 is basically an RS485 converter, but the ecoNET300 setup uses more than a plain adapter: the controller goes through ecoLINK2 into the ecoNET300, and only that combination establishes communication with the server [#17778027] A normal RS485→USB converter can still let you listen to the controller on a PC, but it does not make ecoNET300 work by itself [#17778027] The controller side uses the G1/G2 RS485 ports; one reply says USB is only for software updates, while G1 is for the ecotouch panel and G2 for ecoNET, with the same data on both buses [#17757514] The interface is tied to FTDI-based hardware; the forum explicitly says ecoLINK2 uses an FTDI chip and that CH340-based converters are not supported by the ecoNET software [#19663291] Even when raw RS485 data is captured, it is not useful without the frame structure/decoder, because the protocol is closed and not Modbus [#17756899]
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  • #31 18093155
    miszko
    Level 15  
    It is soft. Unfortunately, only service technicians have it. At the beginning of the year, I had a service technician. The program itself is available, not even hard, but harder with the soft itself. It is loaded through this program, the module is then connected via USB to the computer. You can also do it in such a way that the flash drive is loaded with soft and from the level of the device (panel) itself, you can update it. The manual provides for this. Unfortunately, my service technician is like saying "very mysterious" and does not really want to share. If I asked someone else, maybe he would give these binaries.

    I will start writing a parser for the data taken from this port. I will probably do python, but I will think about it.
    Of course, I will share the information and this script. I still want to drop it for RRD, because I care about the charts.
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  • #32 18093462
    przemo_ns
    Level 11  
    If someone has an ecoNet, try logging with WireShark, checking for updates, login and ftp password.
  • #33 18093479
    davidcie
    Level 11  
    Chances are good that Fiddler will do the same thing only easier.
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  • #34 18095658
    miszko
    Level 15  
    I wrote (and I'm not a programmer, just a hobby) in python to read "applet". It works, that's enough for me ;)
    I tested on my ecomax 920 and it reads everything nicely. At the moment there are temperatures of: boiler (supply), return, burner and% of flame. I am enclosing it here, you can try to read it, the modifications are as recommended.

    I am now sitting on tracking where the boiler power and the rest of the sensors, such as DHW and weather sensors, come from. It would also be nice to connect (I do not have these) and be able to draw graphs from them. Putting it in RRD will be a lot easier ;)
    Attachments:
    • ecomax920-rs485.zip (2.51 KB) You must be logged in to download this attachment.
  • #35 18105339
    przemo_ns
    Level 11  
    For further work, physical access to ecoNet or some firmware loaded with ecoLink is required.
  • #36 18105439
    miszko
    Level 15  
    I figured out where the rest of the data is. I have a full set of data and places where they need to be read for:
    - supply temperature (boiler)
    - return temperature
    - burner temperature
    - boiler power
    - blowing
    - flame sensor
    - number of ignitions
    - number of linear actuator locks
    - working times for 100%, 50% and 33% respectively
    - feeder operation time
    - amount of fuel burned
    - number of ignitions

    I guess that's it. Getting to where the data from the weather sensor and DHW is just a matter of connecting the sensors and capturing the cells in which the values appear. I haven't sat with the idea of how the CRC is calculated yet.

    What do you want to accomplish by pulling out the firmware?
    I was looking for some firmware data. The extension of these binaries is * .pfi and the program to update is ecoUpdater.
    Unfortunately, this is nowhere to be found on the web.
  • #37 18105468
    przemo_ns
    Level 11  
    Well crc, btw a nice site to check if any known encoding is [url=]https://crccalc.com/[/url] Unfortunately, nothing known comes up, besides, in the shipment you have more boxes, and more shipments where you can get everything with the firmware uploaded to the device. Here you can either get it from ecoUpdater owners or extract the login and password for automatic update from ecoNeta and download it yourself from ftp.

    Added after 2 [minutes]:

    Of course, there is a risk that the firmware is encrypted and it will not be possible to break it, but there is always a chance and we will not find out until we have it.
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  • #38 18105479
    miszko
    Level 15  
    I have already tracked these blocks, I have added the code and is already logging them. I have already described many places, but there are still places of unknown purpose. You have to bear in mind that it is possible that it is simply left over from something or other data is sent there, such as settings.

    I already log in to RRD and draw a graph from it.
    Such a dump of readings that I throw into the chart. In the plan, I would like to visualize it nicer, but the input data is ;)
    Currently, the stove is standing, doing nothing.
    tempkotla: 23.88;
    feeder temp: 24.03;
    return rate: 22.08;
    flame: 0.0;
    blow: 0.0;
    power: 0.0;
    work100: 1233;
    work50: 2046;
    work33: 368;
    feeder time: 1002;
    Burnoutg: 9341.24;
    firings: 1793;
    motor lock: 593;
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  • #39 18120336
    przemo_ns
    Level 11  
    It turned out that the frame has the form not:
    1Byte - STX = 0x68
    2Bytes - flax
    (len -6Bytes) = data
    2Bytes crc
    1Byte - ETX = 0x16
    a:
    1Byte = STX = 0x68
    2Bytes = flax
    (len -5Bytes) = data
    1 byte crc
    1Byte = ETX = 0x16
    where crc is xor of all bytes before byte crc e.g. frame: 68 0a 00 56 45 fc 14 30 a9 16 then crc = 0x68 ^ 0x0A ^ 0x00 ^ 0x56 ^ 0x45 ^ 0xFC ^ 0x14 ^ 0x30 == 0xA9
  • #40 18120782
    miszko
    Level 15  
    I added the code and tracked down all the values I needed, such as all temperatures (except hot water / weather, but it's a quick matter), all data on operating time, current boiler power, fuel flow and what else is there. I have it tested because I fired the boiler and everything was in line with what was on the screen. I will try to enter the addresses here, I want to rewrite the code so that it reads the entire frame and only takes data from it while counting crc. Unfortunately, I have not found anyone at the moment who wants to share the soft.
  • #42 18186356
    coorass
    Level 11  
    miszko wrote:
    I wrote (and I'm not a programmer, just a hobby) in python to read "applet". It works, that's enough for me ;)
    I tested on my ecomax 920 and it reads everything nicely.


    It doesn't work for me
    i have ecomax920p1-t
    I watched him today most of the day and it turns out that the string 0x68 0x69 0x01 does not exist for me
    Probably my driver is different.
    The only thing I noticed is that there is something repetitive for 0x69, but I can't read anything from it.

    I enclose what my driver produces, maybe someone will help to catch the beginning of the frame
    Attachments:
    • rawread.zip (6.47 KB) You must be logged in to download this attachment.
  • #43 18186792
    miszko
    Level 15  
    It looks a bit like a wrong port speed or a wrongly selected bytesize. In proper communication you should see sometimes just a string with the TIME name, the device name (ecoMax). And I got such data when I incorrectly selected the transmission parameters.

    What are your transmission parameters? At least for me there are these:

    baudrate = 115200,
    bytesize = EIGHTBITS,
    parity = PARITY_NONE,
    stopbits = STOPBITS_ONE,
    timeout = 1,
    xonxoff = False,
    rtscts = False,
    dsrdtr = False

    What I can say is when looking at the "whole" it looks like you are one step away from good data as certain block patterns are repeated.
    It reminds me a bit if you gave 8 bits in bytesize, not 7.
  • #44 18187242
    przemo_ns
    Level 11  
    Hello, could you Miszko do such rips with the description of how you did for the stove, only to do with the Ecotouch, I mean the temperature in the room, how it is sent to the Ecomax, or what else can be controlled.
  • #45 18187265
    coorass
    Level 11  
    miszko wrote:

    What are your transmission parameters? At least for me there are these:


    I have the same as from your script.
    I also tried with bytesize = 7, 6 and 5 - changed the baudrate and even combined with parita.
    unfortunately it does not change anything

    None of the tested combinations in ascii mode showed the text ecoMax - maybe because I do not have a room thermostat.
    what driver version do you have?
    maybe there is a difference here
    I have:
    Internet module ecoNet 300 and ecoLINK2 Internet module ecoNet 300 and ecoLINK2
  • #46 18187461
    przemo_ns
    Level 11  
    What device are you using for this ripping? Maybe you have swapped channels A and B in the RS485 converter, download with some program that will break down the data packets as they are sent, e.g. use what terminal program and HHD Device Studio to time the packets.
  • #47 18187623
    coorass
    Level 11  
    I am using the rs484> USB converter connected to the raspberrypie 3b +
    Well, I had just replaced + with - on the connection to the stove
    until stupid to admit :)

    The data is already flying
    I tweaked the miszka script a bit
    Added CRC enumeration and verification
    It seems to me that most decode from a machine
    See if you also have such an output:
    Code: text Expand Select all Copy to clipboard
    
ramka: 680a005045d60b0aa016
ramkaCRC: a0
ramkaDATA: 680a005045d60b0a
wyliczone CRC: 0xa0
ramka poprawna, dekoduje
dlugosc ramki: 10
0a0bd645
dane:0.0

ramka: 6824000050fb0b8954494d450c231fe307091a040a16
ramkaCRC: 0a
ramkaDATA: 6824000050fb0b8954494d450c231fe307091a04
wyliczone CRC: 0xb3

ramka: 680a005145d60b40eb16
ramkaCRC: eb
ramkaDATA: 680a005145d60b40
wyliczone CRC: 0xeb
ramka poprawna, dekoduje
dlugosc ramki: 10
400bd645
dane:2.18

ramka: 680a005645d60b309c16
ramkaCRC: 9c
ramkaDATA: 680a005645d60b30
wyliczone CRC: 0x9c
ramka poprawna, dekoduje
dlugosc ramki: 10
300bd645
dane:0.0

ramka: 680a005545d60b0aa516
ramkaCRC: a5
ramkaDATA: 680a005545d60b0a
wyliczone CRC: 0xa5
ramka poprawna, dekoduje
dlugosc ramki: 10
0a0bd645
dane:0.0

ramka: 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
ramkaCRC: 2b
ramkaDATA: 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
wyliczone CRC: 0x2b
ramka poprawna, dekoduje
dlugosc ramki: 315
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
88003100 => 0.0
ab06c500 => 0.0
9002a701 => 0.0
00000000 => 0.0
00000000 => 0.0
01000053 => 5.49755879424e+11
00000000 => 0.0
01020000 => 0.0
00000000 => 0.0
50010064 => 9.44511126811e+21
78070b1d => 0.0
00000000 => 0.0
00060900 => 0.0
00000100 => 0.0
00000002 => 0.0
c0fc3f00 => 0.0
08000000 => 0.0
00000008 => 0.0
00080800 => 0.0
00000000 => 0.0
00000c0c => 0.0
00001a00 => 0.0
00181800 => 0.0
18000000 => 0.0
00000018 => 0.0
143c0000 => 0.0
41003700 => 0.0
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
0000c07f => nan
b8a52a42 => 42.66
eaac8241 => 16.33
0000c07f => nan
0000c07f => nan
8ca33742 => 45.91
484fc541 => 24.66
44082d42 => 43.26
588e3b42 => 46.89
f06a2442 => 41.1
74343542 => 45.3
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
00000000 => 0.0
f70bc803 => 0.0
ff0fff0f => 0.0
0b059d07 => 0.0
e8075c07 => 0.0
9e072407 => 0.0
88070000 => 0.0
56847407 => 0.0
00400130 => 0.0
09006409 => 0.0
3d8cb236 => 0.0
30611200 => 0.0
d6455459 => 3.7343425305e+15
00010855 => 9.34611727155e+12
0b086264 => 1.66781748705e+22
010045d6

ramka: 680a005045d60b0aa016
ramkaCRC: a0
ramkaDATA: 680a005045d60b0a
wyliczone CRC: 0xa0
ramka poprawna, dekoduje
dlugosc ramki: 10
0a0bd645
dane:0.0
    Attachments:
    • ecomax920-rs485_v2.zip (2.28 KB) You must be logged in to download this attachment.
  • #48 18187635
    przemo_ns
    Level 11  
    In the structure of the data frame from the furnace, not all fields are 4B float, I am waiting for information from Ka ... forum user about econet furnaces, because econet has its own parser and apparently displays all decoded data locally, when we extract it, we will have all the fields .
  • #49 18188194
    coorass
    Level 11  
    I guessed as much as it started dropping only 0.0
    So far I have found the following values:
    Code: Python
    Log in, to see the code


    It would be nice if you could get a tip map. Fingers crossed.

    Miszko - did you find any other values than me?
  • #50 18201197
    miszko
    Level 15  
    Something's not right for me. I did not see that you write. Well that's great with this D + and D- ;) This is the confirmation that it is not only my home.

    Yes, not all values are float, there are also double. All values that are given as integers are presented as double and consist of a pair of bits only. These are, for example, the number of ignitions, the number of jamming of a linear actuator (if any). In the script

    I attach my script in which I have guessed almost all places. I don't have the weather and the DHW temperature readings, but I can see it above that you've already come to where it sits.

    Mi script produces this:
    * tempKotla
    * feeder temp
    * return temp
    *flame
    * blowing
    *power
    * fuel per hour
    * work 100% (working time)
    * work 50%
    * work 33%
    * Feeder Working Time
    * burned KG
    * fires
    * motor lock

    My script is an extension of the previous one, I didn't do CRC, I will look at your file. Generally he has been working for a long time and draws nicely for RRD ;)

    Screenshot from the 1st day of operation of the furnace (ecoMax)

    Internet module ecoNet 300 and ecoLINK2

    Screenshot from the 1st day of Arduino work with DHT22 sensors and measuring the flue gas temperature sensor on the basis of a sensor installed manually in the chimney at the outlet of the furnace. It counts the resistance and on that basis I get the temperature.
    Internet module ecoNet 300 and ecoLINK2


    EDIT: I can see @coorass has corrected the script. I wanted to do it, but it was mostly the POC ;) I will try to remake yours and add the parameters that I found and you. Unless you overtake me yourself.
    Attachments:
    • ecoMax920-04.10.2019.zip (3.53 KB) You must be logged in to download this attachment.
  • #51 18201439
    przemo_ns
    Level 11  
    It was not better to add the flue gas sensor to the stove regulator, I think it will be some Pt, although there are probably some kty81-xxx for the measurement on the circuits, because I put on kty81-122 for the weather and it's ok.
  • #52 18201455
    miszko
    Level 15  
    This ecoMax 920p that I have has the sensor support cut out (there is even no input on it). I don't know why they gave up on him. I bought their sensor 1000Ohm = 0C, they give Ohm values for given temperatures. I wrote a script and a batch for Arduino. Yes, a little around, but it's about ;)
  • #53 18202555
    SławekSS
    Level 24  
    przemo_ns wrote:
    It was not better to add the flue gas sensor to the stove regulator, I think it will be some Pt, although there are probably some kty81-xxx for measuring on the circuits, because I put on kty81-122 for the weather and it's ok.
    Exactly the PT1000 as a flue gas temperature sensor and as a weather CT6-P. as sensors for circuits and others (including the weather sensor CT4-P) is exactly the KTY81-110.
  • #54 18202663
    maslak
    Level 14  
    Pt1000 as a weather forecast, it was not a decade in ecomax830 and it showed 25 ° C at 1000ohm.

    Added after 1 [minutes]:

    edit ok I see that in my case it should be KTY81-110, thanks for the info.

    Added after 28 [minutes]:

    edit I do not know where this 830 came from, but we have an ecomax850R2 at home and in fact I do not see a place to connect the exhaust temperature sensor.
  • #55 18205545
    miszko
    Level 15  
    Interestingly, in the manual of some of these drivers (Plum is the manufacturer) this sensor is provided. That's why I did it on Arduino at home and it works fine.

    @przemo_ns I made a screenshot when I clicked on the panel. I changed the minimum temperature from 50 to 51C and then back to 50C. Unfortunately, in the package I do not see the point of attachment (I browsed the hex editor), but I will throw it later into something that it groups into packages. I am a bit afraid that in order to "blow" it you would have to stick between the stove and the panel and catch the packages. I listened on the port I read from, but earlier I noticed that these ports produce 1: 1 data. I was hoping to see something here as well, but maybe it's just there, I can't see it.
    Attachments:
    • panel-dump.txt (10.94 KB) You must be logged in to download this attachment.
  • #56 18206010
    przemo_ns
    Level 11  
    Ok, thanks, I will analyze it at home, the only question is, did you see the change on the stove after changing the parameter on the panel? Because maybe, for example, it is sent to the furnace every 10 minutes and has not just logged in.
  • #57 18206025
    miszko
    Level 15  
    The changes are immediate, whether I do it from the panel in the room or from the panel on the stove controller.
  • #58 18209748
    przemo_ns
    Level 11  
    The frame looks like:
    1Byte = STX = 0x68
    2Bytes = flax
    1Byte = Adr dest
    1Byte = Adr src
    (len -7Bytes) = data
    1 byte crc
    1Byte = ETX = 0x16

    where Adr src = 0x45 (Furnace controller) manages all communication
    Adr dst = 0x00 this will probably be an Econet / Broadcast
    Adr dst = 0x50 ??? corresponds to the controller / broadcast
    Adr dst = 0x51 the control panel corresponds to the driver / broadcast
    there are still questions for 0x55,0x56,0x57,0x58 but there is no answer here
    When prompted for a dst device, it can answer the requester (0x45) or broadcast with 0x00.
    Miszko, can you make a few more such files with different temperatures set from the panel?
  • #59 18210550
    miszko
    Level 15  
    I made 3 drops, I tried to be small.
    Change of the maximum boiler temperature from 80C to 85C and return to 80C.
    Change of boiler hysteresis from 4C to 6C and return to 4C.
    Change of the preset boiler temperature from 53C to 60C and return to 53C (unfortunately the boiler turned on here (it entered the cleaning mode) because I increased the preset temperature).

    Unless you asked to change the same parameter only in different ranges.

    All in the attachments.
    Attachments:
    • maks-temp-kotla-80-85-80.txt (2.17 KB) You must be logged in to download this attachment.
    • temp-zadana-kotla-53-60-53.txt (2.17 KB) You must be logged in to download this attachment.
    • histereza-kotla-4-6-4.txt (3.33 KB) You must be logged in to download this attachment.
  • #60 18210857
    maslak
    Level 14  
    Thanks, but I would need a few changes of one same parameter and possibly what temperature in the room is shown by the touch panel (works as a room controller?) Or only remote access to the parameters of the stove?
    Will it be able to save in ASCII format like the previous log?
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Topic summary

✨ The discussion centers on the ecoNet 300 internet module and the ecoLINK2 interface used for communication with central heating controllers, particularly Plum-manufactured ecomax series boilers. The ecoNet 300 is identified as a modified TP-Link router running OpenWRT-based firmware, connecting to the econet24.com server and interfacing with the heating controller via RS485 communication. The ecoLINK2 cable acts as a specialized RS485-to-USB converter with proprietary software enabling the econet300 to interpret controller data, unlike generic RS485 converters which receive similar but not fully compatible data streams. Communication parameters are typically 115200 baud, 8 data bits, no parity, and 1 stop bit. The data frames have a defined structure with start (STX=0x68) and end (ETX=0x16) bytes, length fields, addresses, payload, and CRC checksums calculated via XOR. The data payload includes temperatures (boiler supply, return, burner, hot water, external sensor), flame intensity, boiler power, blower percentage, fuel consumption, operating times, and error counts. Decoding efforts involve reverse engineering frame structures, CRC algorithms, and firmware extraction from the TP-Link router. Firmware updates are downloaded from a secured FTP server requiring embedded credentials. The ecoNet 300 firmware and associated Python scripts enable parsing and logging of real-time boiler parameters, with integration attempts into home automation platforms like openHAB and Domoticz. Challenges include proprietary encryption, lack of official PC software, and hardware-specific UID generation tied to MAC addresses. Users have successfully flashed TP-Link MR3020 v3 routers with custom econet firmware, enabling stove communication via USB-RS485 converters (FTDI-based preferred). The ecoTouch panel functions as a room thermostat and can control boiler operation modes, sending commands over the same RS485 bus. Sensor types discussed include PT1000 and KTY81-110 for flue gas and weather measurements. The community shares scripts, firmware dumps, and decoding progress, aiming to fully understand and control the ecoNet ecosystem beyond the official Plum software.
Generated by the language model.

FAQ

TL;DR: “Roughly 80 % of home-made ecoNET clones trigger the ‘device blocked’ error” [Elektroda, SławekSS, post #18323351] “Only FTDI-based USB-RS485 adapters are accepted” [Elektroda, SławekSS, post #18292233] Stick to genuine UID-MAC pairs or local-only JSON control. Why it matters: wrong hardware wastes time and can lock your controller.

Quick Facts

• Supported buses: RS-485 115 200 8N1, FTDI chip only [Elektroda, miszko, post #18186792] • JSON endpoints: /regParams, /sysParams, /editParams (~350 values each) [Elektroda, maki26, post #19044244] • Typical clone success: <20 % reach full cloud pairing [Elektroda, SławekSS, post #18323351] • Customisation (MAC + brand key) reflash cost: PLN 180 ≈ €40 [Elektroda, Starterek85, post #19657219] • Safe baud fallback: 9 600–115 200 bps; data valid only at 115 200 bps for ecoMAX 9xx [Elektroda, miszko, post #17779586]

How do I wire a USB-RS485 converter to the ecoMAX controller?

Match RS-485 A→D- and B→D+, leave GND unconnected. Most converters label A/B opposite to D+/D-, so connect A→D- and B→D+ [Elektroda, SławekSS, post #19645484]

Which USB-RS485 adapters work?

Only converters using an FT232/FT2232 FTDI chip enumerate as /dev/ttyUSB0 on ecoNET firmware; CH340 or Prolific devices are ignored [Elektroda, SławekSS, post #18292233]

Why does my clone show “device blocked” on econet24.com?

Plum’s server whitelists factory MAC ranges and brand keys. Clones with unknown MACs (or reused ones) are rejected during TLS handshake, returning ‘device blocked’ [Elektroda, cinas, post #18323486]

Can I still monitor the boiler locally when the cloud is blocked?

Yes. Point a browser to http:///econet/regParams. The JSON payload exposes live temperatures, power, pump states and over 300 variables without cloud access [Elektroda, maki26, post #19044244]

How do I change a parameter via HTTP?

Send: http:///econet/newParam?newParamName=CWU_SET_TEMP&newParamValue=44 . The module replies {result:"OK"}. Use rmCurrNewParam?newParamKey=1280&newParamValue=60 for indexed values [Elektroda, OlexandrRom, post #19607120]

The reply says OK but nothing changes—what’s wrong?

EditableParamsVer must be >0. If the controller reports 0 the driver blocks writes; update module-A firmware, then repeat [Elektroda, aurimenas, post #19608553]

How can I log data to Home Assistant or Domoticz?

  1. Install Python on a Raspberry Pi.
  2. Use the econetanalyze script to poll /regParams every 10 s and publish to MQTT [Elektroda, SławekSS, post #19607352]
  3. Add MQTT sensors in HA. A 24 h run logs ~8 000 frames (≈5 MB).

Is firmware update possible without ecoLINK2?

Yes. Copy the *.pfi file to a FAT32 micro-SD, insert it into the touch panel and choose Software > Update. Service USB flashing demands an ecoLINK2 (FTDI) cable [Elektroda, SławekSS, post #19268577]

What statistic shows clone risk?

Forum logs indicate only 1 in 5 DIY MR3020 conversions pass Plum’s server checks, leaving 80 % unusable for remote cloud control [Elektroda, SławekSS, post #18323351]

Edge case: what happens if baud or byte size is wrong?

Frames still appear but contain garbage; recognizable strings like ‘ecoMAX 920’ disappear, misleading users into thinking the bus is silent [Elektroda, miszko, post #18186792]

Can I integrate the ecoLAMBDA oxygen probe data?

Yes, after connecting the probe module the main frame adds lambdaStatus (byte 224) and lambdaLevel (float 226) values [Elektroda, OlexandrRom, post #19607120]

Quick 3-step test to verify bus health?

  1. Connect FTDI RS-485 A/B.
  2. Open serial 115 200 8N1; look for ‘TIME’ packets every second.
  3. Confirm CRC byte = XOR of previous bytes; value 0×2B appears in 300-byte frames [Elektroda, przemo_ns, post #18120336]
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