Junkers CERAPUR SMART ZWB28+CT200 Easy Control not recognized

[DinoFontana]

DESCRIPTION

I connect EMS interface of my Boiler JUNKER CERAPUR SMART using the screenshot terminal B-B. In the BUS ha e also CT200 Easy control.
The Boiler is recognized as a “Generic Boiler” and not as an exact model ,
I also receive many incomplete rx .

REQUESTED INFORMATION

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• [x ] Searched the issue in issues
• [ x] Searched the issue in discussions
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• [x ] Provide the System information in the area below, taken from http://<IP>/api/system

  Paste System information here....

{
  "system": {
    "version": "3.7.3-dev.17",
    "uptime": "000+00:11:18.832",
    "uptimeSec": 678,
    "platform": "ESP32",
    "cpuType": "ESP32-D0WD-V3",
    "arduino": "Tasmota Arduino v2.0.17",
    "sdk": "4.4.8.240628",
    "freeMem": 163,
    "maxAlloc": 91,
    "freeCaps": 114,
    "usedApp": 1665,
    "freeApp": 319,
    "partition": "app0",
    "flash_chip_size": 4096,
    "resetReason": "Software reset CPU / Software reset CPU",
    "psram": false,
    "model": ""
  },
  "network": {
    "network": "WiFi",
    "hostname": "ems-esp",
    "RSSI": -55,
    "WIFIReconnects": 0,
    "TxPowerSetting": 0,
    "staticIP": false,
    "lowBandwidth": false,
    "disableSleep": true,
    "enableMDNS": true,
    "enableCORS": false,
    "APProvisionMode": "disconnected",
    "APSecurity": "wpa2",
    "APSSID": "ems-esp"
  },
  "ntp": {
    "NTPStatus": "connected",
    "enabled": true,
    "server": "time.google.com",
    "tzLabel": "Europe/Rome",
    "timestamp": 1758229477
  },
  "mqtt": {
    "MQTTStatus": "disconnected",
    "enabled": false,
    "clientID": "esp32-a21b5ae0",
    "keepAlive": 60,
    "cleanSession": false,
    "entityFormat": 0,
    "base": "ems-esp",
    "discoveryPrefix": "homeassistant",
    "discoveryType": 0,
    "nestedFormat": 1,
    "haEnabled": false,
    "mqttQos": 0,
    "mqttRetain": false,
    "publishTimeHeartbeat": 60,
    "publishTimeBoiler": 10,
    "publishTimeThermostat": 10,
    "publishTimeSolar": 10,
    "publishTimeMixer": 10,
    "publishTimeWater": 10,
    "publishTimeOther": 60,
    "publishTimeSensor": 10,
    "publishSingle": false,
    "publish2command": false,
    "sendResponse": false
  },
  "syslog": {
    "enabled": false
  },
  "sensor": {},
  "api": {
    "APICalls": 0,
    "APIFails": 0
  },
  "bus": {
    "busStatus": "connected, tx issues - try a different Tx Mode",
    "busProtocol": "HT3",
    "busTelegramsReceived": 188,
    "busReads": 0,
    "busWrites": 0,
    "busIncompleteTelegrams": 52,
    "busReadsFailed": 140,
    "busWritesFailed": 0,
    "busRxLineQuality": 79,
    "busTxLineQuality": 0
  },
  "settings": {
    "boardProfile": "CUSTOM",
    "locale": "it",
    "txMode": 3,
    "emsBusID": 11,
    "showerTimer": false,
    "showerMinDuration": 180,
    "showerAlert": false,
    "phyType": 0,
    "rxGPIO": 16,
    "txGPIO": 17,
    "dallasGPIO": 0,
    "pbuttonGPIO": 0,
    "ledGPIO": 2,
    "ledType": 0,
    "hideLed": true,
    "noTokenApi": false,
    "readonlyMode": true,
    "fahrenheit": false,
    "dallasParasite": false,
    "boolFormat": 2,
    "boolDashboard": 2,
    "enumFormat": 1,
    "analogEnabled": false,
    "telnetEnabled": true,
    "maxWebLogBuffer": 25,
    "modbusEnabled": false,
    "forceHeatingOff": false,
    "developerMode": true
  },
  "devices": [
    {
      "type": "boiler",
      "name": "Generic Boiler",
      "deviceID": "0x08",
      "productID": 0,
      "brand": "",
      "version": "00.00",
      "entities": 28,
      "handlersReceived": "0x18 0x34",
      "handlersPending": "0xBF 0x10 0x11 0xC2 0xC6 0x15 0x1C 0x19 0x1A 0x35 0x2A 0xD1 0xE3 0xE4 0xE5 0xE9 0x0494 0x0495 0x048D 0x048F 0x048A 0x04A2 0x0485 0x0486 0x0492 0x0488 0x0484 0x048B 0x0491 0x0499 0x049C 0x049D 0x04AE 0x04AF 0x02CC"
    },
    {
      "type": "controller",
      "name": "Generic Controller",
      "deviceID": "0x09",
      "productID": 0,
      "brand": "",
      "version": "00.00",
      "entities": 0
    }
  ]
}

TO REPRODUCE

Steps to reproduce the behavior:

EXPECTED BEHAVIOUR

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SCREENSHOTS

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ADDITIONAL CONTEXT

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(Please remember to close the issue when it has been addressed)

[proddy]

can you attach the log as well. If Tx is not working and Rx is receiving incomplete telegrams then its most likely a wiring issue

[DinoFontana]

log.txt

I'm attaching the logs. The TX on the ESP is disabled (only via software). I don't think it could be the wiring. I checked the signal quality on the ESP32's RX pin, and it seems fine. (I'm attaching an image.)

[MichaelDvP]

The image shows a 5V signal, i don't think the esp like this.

[DinoFontana]

That is the signal on the rx pin of the esp32 after the interface, it is to confirm that the esp32 receives well, has no noise, the hardware interface is OK.

[MichaelDvP]

esp32 is 3.3V and also the input pins are limited to 3.3V, 5V it too much, the esp will be damaged or behave erratic.

[DinoFontana]

ok, you're right, I can fix this and reduce the power supply to 3.3V but I don't think it's the problem of the boiler not being recognized

[MichaelDvP]

As mentioned, the boiler is not recognized because tx is disabled. Ems-esp sees a boiler but can't determine the type, so it is set as generic.

[MichaelDvP]

This is a doublette of #2626, please close one.
Without TX it is not possible to read the device infos and to identify the boiler, so it shows up as generic.

[proddy]

moving to a discussion. this is not an issue with the EMS-ESP software

[DinoFontana]

log (3).txt
This is the log with TX enabled.
I remember that in addition to the boiler, the CT200 thermostat is also on the bus, and I believe that the CT200 is Master, therefore enabling tx could create conflicts

[MichaelDvP]

Tx is still not working ( Last Tx Read operation failed after 3 retries), i guess because of 3.3/5V mismatch.
CT200 is bus client, It just ignores any write or read request, we get no answer, but that's all.