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Unable to change any values on Junkers FW200 #105

Description

@simasjoris

ESP-32 Running latest firmware (v3.2.1)

Bug description
My Junkers FW200 controller displays all information correctly, but changing any values has no effect.
Connection Status shows Tx Errors with ~20% TX success rate.
Console also shows TX errors (see attached screenshot).

Tried changing all available TX protocols in settings without any success. Also tried changing flow, heating and other values
for boiler device - same TX errors.

Steps to reproduce
Open web console dashboard. Select FW200 thermostat, change temperature or date.

Expected behavior
Temperature or date changes

Screenshots
log

Device information

{
  "System": {
    "version": "3.2.1",
    "uptime": "000+00:44:57.787",
    "uptime_sec": 2697,
    "freemem": 167
  },
  "Status": {
    "bus": "connected, instable tx",
    "bus protocol": "HT3",
    "telegrams received": 3433,
    "read requests sent": 100,
    "write requests sent": 4,
    "incomplete telegrams": 0,
    "tx fails": 82,
    "rx line quality": 100,
    "tx line quality": 18,
    "MQTT publishes": 1196,
    "MQTT publish fails": 0,
    "dallas sensors": 0,
    "dallas reads": 0,
    "dallas fails": 0
  },
  "Devices": [
    {
      "type": "Boiler",
      "name": "Condens 2500/Logamax/Logomatic/Cerapur Top/Greenstar/Generic HT3 (DeviceID:0x08, ProductID:95, Version:18.03)",
      "handlers": "0x10 0x11 0x14 0x15 0x1C 0x18 0x19 0x1A 0x35 0x16 0x33 0x34 0x26 0x2A"
    },
    {
      "type": "Thermostat",
      "name": "Junkers FW200 (DeviceID:0x10 ProductID:106, Version:12.07)",
      "handlers": "0xA3 0x06 0xA2 0x12 0x16F 0x170 0x171 0x172 0x165 0x166 0x167 0x168"
    },
    {
      "type": "Mixer",
      "name": "Junkers IPM (DeviceID:0x21 ProductID:102, Version:16.64)",
      "handlers": "0x10C 0x1E"
    },
    {
      "type": "Mixer",
      "name": "Junkers IPM (DeviceID:0x20 ProductID:102, Version:16.64)",
      "handlers": "0x10C 0x1E"
    },
    {
      "type": "Controller",
      "name": "HT3 (DeviceID:0x09, ProductID:95, Version:18.03)",
      "handlers": ""
    }
  ]
}

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