Required CCU firmware version: ≥ 3.75.6
sha256: ed9b8fe4a6ad54b460eea3e54d4fd2355c2db3dbcaf084d9004776cb3a3493d1
C H A N G E L O G
Please note: Only use the firmware file in connection with the current software-version of the CCUx!
Device: HmIP-WTH-B-A - Homematic IP Wall Thermostat - basic
Company: eQ-3, Maiburger Str. 29, 26789 Leer, Germany
Version 1.6.2 - 2026-04-23
** Version
- Application: 1.6.2
- Bootloader: 1.16.2
- Library: 1.94.0
** Bugfix
- In connection with a switching actuator, the device sends target level 0 in the
"On" state (30.5).
- The antenna symbol continued to flash even though radio communication with the
floor heating controller had been restored.
- The hygrostat mode (2-point control with actuator) was operates in cooling mode
inverted.
** Inprovement
- Extension of the âHeating Controller Modeâ frame to include the information
âHeating/Coolingâ.
If a communication failure prevents the wall thermostat from being informed about a
heating/cooling mode change, the floor heating controller can use the additional
information in the Heating Controller Mode frame to check whether the devices are
synchronized in terms of mode. If not, the floor heating controller will inform the
wall thermostat again.
Version 1.4.4 - 2025-11-28
** Bugfix
- Window open temperature was not activated if parameter 0x5a in List 1 / Channel 5
deviates from the default value with regard to heating/cooling.
Version 1.4.2 - 2024-04-18
** Bugfix
- The "Heating Controller Mode" frame was sent several times.
The "Heating Controller Mode" telegram was sent cyclically to each channel of the
FAL. It is sufficient if the telegram is sent to the FAL only once.
- The device send no DEC telegram to link partners if a new link partner was
previously added or removed.
- Instead of a conditional switch command the device should send a level command to
linked switch actuators. This allows the actuator to be deactivated directly by the
wall thermostat.
- Hysteresis for 2-point control with switching actuator does not work as specified.
The hysteresis was not evaluated correctly for the humidity. The resolution should
be 1%. However, it actually had a resolution of 2%.
- Emergency shutdown at 30°C during cooling.
Cooling is also active when the set temperature is greater than 30.0°C
** Modification
- Default Value of TEMPERATURE_LOWERING_COOLING to 30.0°C
- Cooling Weekprogram to Flatline 28°C
- The automatic switchover from manu-mode to auto-mode after a restart following
receipt of the first time-info telegram should be deactivated.
** New Feature
- New Parameter TEMPERATURE_WINDOW_OPEN_COOLING for set point temperature in cooling
mode.
- Implementation of the "Heating controller 2 bit field" parameter in list 1 for
channel 5. The parameter values COOLING_ENABLE and HEATING_ENABLE were added for
channel 5 (Actuator link partner). This makes it possible to deactivate cooling or
heating in the respective mode.
Version 1.2.020 - 2023-04-20
** Version
- Application: 1.2.018
- Bootloader: 1.16.002
- Library: 1.64.000
** Bugfix
- After reinclusion, partly cyclic data telegrams for eTRV, actuator and FAL are not
sent.
- Device cannot be paired with channel 11 and 12 of FALMOT in pairing mode.
Version 1.2.016 - 2022-03-25
** First release
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