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I have a ZWO EAF with the temp sensor connected to KStars/Ekos 3.5.8 Stable running on Ubuntu 20.04 and it indeed does work. Takes some treaking of the parameters (like everything else) to optimize the focus process for your rig. There's a spot on the Focus Module to select the source of the temperature used for re-focus on delta-temp and the current & delta reading just below the pull-down menu (see picture)

Here's the result of indi_getprop "ASI EAF.*.*" on the machine with EAF powered on:

ASI EAF.CONNECTION.CONNECT=On
ASI EAF.CONNECTION.DISCONNECT=Off
ASI EAF.DRIVER_INFO.DRIVER_NAME=ASI EAF
ASI EAF.DRIVER_INFO.DRIVER_EXEC=indi_asi_focuser
ASI EAF.DRIVER_INFO.DRIVER_VERSION=1.0
ASI EAF.DRIVER_INFO.DRIVER_INTERFACE=8
ASI EAF.DEBUG.ENABLE=Off
ASI EAF.DEBUG.DISABLE=On
ASI EAF.POLLING_PERIOD.PERIOD_MS=500
ASI EAF.CONFIG_PROCESS.CONFIG_LOAD=Off
ASI EAF.CONFIG_PROCESS.CONFIG_SAVE=Off
ASI EAF.CONFIG_PROCESS.CONFIG_DEFAULT=Off
ASI EAF.CONFIG_PROCESS.CONFIG_PURGE=Off
ASI EAF.FOCUS_MOTION.FOCUS_INWARD=On
ASI EAF.FOCUS_MOTION.FOCUS_OUTWARD=Off
ASI EAF.REL_FOCUS_POSITION.FOCUS_RELATIVE_POSITION=0
ASI EAF.ABS_FOCUS_POSITION.FOCUS_ABSOLUTE_POSITION=30098
ASI EAF.FOCUS_MAX.FOCUS_MAX_VALUE=100000
ASI EAF.FOCUS_ABORT_MOTION.ABORT=Off
ASI EAF.FOCUS_SYNC.FOCUS_SYNC_VALUE=0
ASI EAF.FOCUS_REVERSE_MOTION.INDI_ENABLED=On
ASI EAF.FOCUS_REVERSE_MOTION.INDI_DISABLED=Off
ASI EAF.FOCUS_BACKLASH_TOGGLE.INDI_ENABLED=On
ASI EAF.FOCUS_BACKLASH_TOGGLE.INDI_DISABLED=Off
ASI EAF.FOCUS_BACKLASH_STEPS.FOCUS_BACKLASH_VALUE=30
ASI EAF.Presets.PRESET_1=0
ASI EAF.Presets.PRESET_2=0
ASI EAF.Presets.PRESET_3=0
ASI EAF.Goto.Preset 1=Off
ASI EAF.Goto.Preset 2=Off
ASI EAF.Goto.Preset 3=Off
ASI EAF.USEJOYSTICK.ENABLE=Off
ASI EAF.USEJOYSTICK.DISABLE=On
ASI EAF.SNOOP_JOYSTICK.SNOOP_JOYSTICK_DEVICE=Joystick
ASI EAF.FOCUS_TEMPERATURE.TEMPERATURE=21.629999160766601562
ASI EAF.FOCUS_BEEP.ON=On
ASI EAF.FOCUS_BEEP.OFF=Off
ASI EAF.VERSION.VERSION_FIRMWARE=3.1.9
ASI EAF.USEJOYSTICK.ENABLE=Off
ASI EAF.USEJOYSTICK.DISABLE=On
ASI EAF.SNOOP_JOYSTICK.SNOOP_JOYSTICK_DEVICE=Joystick